; SERVID - Serial video display using Ubicom SX microcontroller ; $Id servid.asm,v 1.34 2001/01/31 07 25 31 eric Exp $ ;**************************************************************** ; SX-KEY source mnenomics for SX18 device by Peter Verkaik ; This port uses the same oscillator frequency as the original source ; so it should run directly for NTSC. ; Do not contact the authors of the original source about this conversion ; Instead contact me: peterverkaik@boselectro.nl ;**************************************************************** ; ; Copyright 2000, 2001 Eric Smith <eric@brouhaha.com> ; ; Home page ; http //www.brouhaha.com/ubicom/servid/ ; ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License version 2 as published ; by the Free Software Foundation. Note that permission is not granted ; to redistribute this program under the terms of any other version of the ; General Public License. ; ; This program is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; GNU General Public License for more details. ; ; You should have received a copy of the GNU General Public License ; along with this program; if not, write to the Free Software ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ; ; NOTE it is sometimes claimed that compliance with the GPL is ; awkward for commercial interests. Licenses for non-GPL use of this ; program may be negotiated with the author. ; ; This program is written to be assembled with the GPASM assembler, ; version 0.8.14 or newer ; http //gpasm.sourceforge.net/ ; NOTE there are references in this code to PAL and NTSC. Technically ; those are color standards. In most cases the references to PAL and NTSC ; are really intended to refer to 625/50 and 525/59.94 scanning, or (in ; non-interlaced mode) 312/25 and 262/29.97 scanning. device SX18L,oschs2,turbo,stackx_optionx,carryx ;sx device options freq 42_954_545 ;resonator frequency id '-SERVID-' ;code identification reset reset_entry ;set reset vector ;Features: ; ;serial input at 1200 bps 8N1 (eight data bits, no parity, one stop bit), MSB ignored ;monochrome displayo of four lines of twenty characaters ;1 volt peak-to-peak composite video ouptut into 75 ohm load ;ASCII character set, 95 displayable characters ;Subset of VT52 control characters and escape sequences ;Automatic scrolling ( no extra "4" characters when scrolling ) ;interlaced or non-interlaced video selectable by conditional assembly ;approximate RS-170 timing (525/60) ;approximate PAL timing (625/50) selectable by conditional assembly - maybe. ;PAL timing of an earlier version was only tested in a cursory fashion. ;Since then the line type table for PAL has been rewritten in an attempt to more ;closely meet PAL scanning specifications (e.g., 5 each equalization, vsync, ;equalization pulses per field). However, this newer code has not been tested ;in PAL mode at all. ;This is a preliminary release. As such, it basically works, ;but there are some known bugs (and probably a lot of unknown ones): ; ;some escape sequences are acting a bit flaky ;Supported control codes: ; ; $00 Null ; $07 Bell ; $08 Backspace ; $0A Line Feed ; $0C Form Feed - clear display and home cursor ; $0D Carriage Return ; $1B Escape - introduce escape sequence ; $7F Delete - ignored ; ; All unrecognized control characters are ignored. ;Supported escape sequences: ; ; ESC A - Cursor Up - wraparound rather than scroll ; ESC B - Cursor Down - wraparound rather than scroll ; ESC C - Cursor Left ; ESC D - Cursor Right ; ; ESC H - Cursor Home ; ESC I - Reverse Line Feed - may scroll ; ESC J - Erase to End of Screen ; ESC K - Erase to End of Line ; ; ESC Y- Direct cursor addressing, col and row offset by 32 ; ;Customization: ; ;SERVID is designed such that user application code may be added to (or replace) ;the serial character processing. In this release of the code there are 919 words ;of program memory free for a user application, and 21 bytes of RAM free. ;The video generation is entirely interrupt driven, so the user application code ;can run at non-interrupt time without any critical timing constraints. ; ;Software Requirements: ; ;As written, SERVID will only assemble with the GPASM assembler, version 0.8.14 ;or newer. GPASM is Free Software: ;http://gpasm.sourceforge.net/ ; ;Hardware Requirements: ; ;SERVID requires a processor clock of 42.954545 MHz (12 times the NTSC color burst frequency). ;Note that future versions of SERVID may change to a clock frequency of 57.272727 MHz ;(16 times the NTSC color burst frequency). Digikey offers suitable Epson oscillators ;which they program to customer spec; a suitable 8-pin DIP footprint (4 actual pin) part ;is part number SG-8002DC-PHB-ND. SERVID uses an 8-bit D/A converter on port B to generate ;the video output. A simple R-2R resistor ladder will suffice. ; ;The serial input should be fed into port RA0. If a conventional EIA-232 receiver ;(MC1489, MAX232, or the like) is used, the variable ft_ser_noninv near the top of ;the servid.asm source file should be set to 0. For a non-inverting serial input ;(such as the crude resistor-only method, see the file SCHEMATIC), ft_ser_noninv ;should be set to 1. ; ;Bill of Materials ;All parts but the microcontroller are available from Digikey. ;Digikey part numbers are given except for the microcontroller, ;for which a Mouser part number is given. ; ;http://www.digikey.com/ ;http://www.mouser.com/ ; ; Vendor Distributor ;Q. Vendor Part Part Number Description ;-- ------ --------- ------------- ---------------------------------------- ; 1 Ubicom SX18AC/DP 619-SX18AC/DP microcontroller, 18-pin plastic DIP ; 1 Epson SG-8002DC-PHB preprogrammed oscillator, 42.9545454 MHz ; 1 CTS 761-3-R220 8 * 220 ohm DIP resistor network ; 2 CTS 770-103-R120 5 * 120 ohm SIP res. network, isolated ; ; 1 15 ohm 1/8 watt resistor ; 1 33K ohm 1/8 watt resistor ; 1 180K ohm 1/8 watt resistor ; 1 0.1 uF ceramic capacitor ; ; 1 BNC or RCA jack for video output ; 1 DB25 connector for serial input ; 1 5V regulated DC power supply ; ;Schematic ;Schematic for SERVID ;$Id: SCHEMATIC,v 1.4 2001/01/04 23:52:55 eric Exp $ ; ;Copyright 2001 Richard Ottosen ; ; ; +5V ; | ; +---------------+ ; | | ; 0.1 uF | ; | | 1.25V p-p ; | ---------------- Video into ; V | | 75 ohms ; | Ubicom / | ; | SX18AC | 7 |--- 220 ohm ---+--------+--- 15 ohm ---> ; | | | | | ; +5V --| MCLR | | 120 ohm 120 ohm +---> ; | | | | | | ;---------- | | 6 |--- 220 ohm ---+ | | ;|42.954545 | | | | | V V ;| MHz |-----| OSC1 | | 120 ohm ;|Oscillator| | | | | ; ---------- NC--| OSC2 | 5 |--- 220 ohm ---+ ; | | | | ; | | | 120 ohm ; +------| RTCC | | | ; | | / 4 |--- 220 ohm ---+ ; V | | | | ; | Port B < | 120 ohm ; | | | | ; NC--| PA3 \ 3 |--- 220 ohm ---+ ; | | | | ; NC--| PA2 | | 120 ohm ; | | | | ; +------| PA1 | 2 |--- 220 ohm ---+ ; | | | | | ; -- | | | 120 ohm ; piezo [] ))) | | | | ; -- | | 1 |--- 220 ohm ---+ ; | | | | | ; | | | | 120 ohm ; V | | | | ;IA-232 | | 0 |--- 220 ohm ---+ ;Input | \ | | ;<----+--- 33K ---| PA0 | 120 ohm ; | | | | ; 180K ---------------- | ; | | 120 ohm ;<----+ | | ; | | | ; V V V ;--------------------------------------------------------------------------- ; feature test switches ;--------------------------------------------------------------------------- ft_pal_video equ 0 ; 0 for NTSC 525/60, 1 for PAL 625/50 ; (approximate timing only) ; (not well tested) ft_interlace equ 1 ; 1 for interlaced video ft_color equ 0 ; 1 for color burst (NTSC only) ft_serial_input equ 1 ; 1 for normal serial input, ; 0 to omit (when replaced with user ; application code) ft_ser_noninv equ 1 ; 0 for "normal" TTL-level serial, ; mark = low, space = high ; 1 for non-inverted serial (the ; crude resistor-only method) ; mark = high, space = low ft_splash equ 1 ; 1 for splash screen ;============================================================================== ; ; This program is available from ; ; Rho Enterprises ; 4100 W. Colfax Ave. ; Box 33 ; Denver, CO 80204 ; ; Phone 720-359-1467 Email info@rhoent.com ; ; http //www.rhoent.com/ ; ;============================================================================== ; ;SXDEFS.INC by Loren Blaney and Richard Ottosen 14-FEB-2000 ; ;Scenix SX Definitions for Microchip MPASM. ; ;REVISIONS ;FEB-23-98, Released. ;MAR-21-98, Added ID label. Corrected XT & HS defs by swapping them. ; Removed ASCII defs. New STATUS defs. ;MAR-27-98, Added PAGEA, BANKA, FCALL, FGOTO, SKIP. ;APR-13-98, Added CSA, CSBE (etc.) macros. Enclose all arguments in parentheses. ; Indent macros. ;APR-23-98, Changed some comments. ;OCT-4-98, Removed "RADIX DEC", added processor type based on SX FUSEX bits, ; added Trim bits to FUSEX and other cleanup. R.O. ;OCT-14-98 BOSC defaults to a "1". ;NOV-4-98, Revised Pins, Trim bits and BOSC in DEVICE equates, removed some ; inversions. R.O. ;SEP-11-99, Added warnings and messages to BANK and PAGE macros. R.O. ;9-JAN-2000, Changed ID bytes to leave unused bits as ones. R.O. ;12-JAN-2000, Made variables in macros local. R.O. ;14-FEB-2000, Cleanup. R.O. ;Define special function registers ;INDF equ 00h ;used for indirects thru fsr ;RTCC equ 01h ;real time clock/counter ;PCL equ 02h ;low 8 bits of PC ;STATUS equ 03h ;status bits ;FSR equ 04h ;file select register ;PORTA equ 05h ;I/O ports ;PORTB equ 06h ;supports multi-input wake-up (MIWU) ;PORTC equ 07h ;Define STATUS register bits CF equ 0 ;carry DCF equ 1 ;digit carry ZF equ 2 ;zero PDF equ 3 ;sleep power down (true low) TOF equ 4 ;watchdog time out (true low) ;PA0 equ 5 ;page select (LSB) ;PA1 equ 6 ;page select ;PA2 equ 7 ;page select (MSB) ;Define port control registers ;TRISX equ 0Fh ;tristate (1=input, 0=output) ;PLP equ 0Eh ;pullup (1=none, 0=20k) ;LVL equ 0Dh ;level (1=TTL, 0=CMOS) ;ST equ 0Ch ;Schmitt trigger (1=disabled, 0=enabled) ;WKEN equ 0Bh ;wake up (1=disabled, 0=enabled) ;WKED equ 0Ah ;wake up edge (1=falling, 0=rising) ;WKPND equ 09h ;wake up pending (1=pending, 0=none) ;CMP equ 08h ;comparator bit 0=result, 6=output, 7=enabled ;Define device symbols for configuration words (FUSE & FUSEX) ;OSCRC equ %00 ;external RC network (default, inverted) ;OSCHS equ %01 ;high speed external crystal/resonator ;OSCXT equ %10 ;normal external crystal/resonator ;OSCLP equ %11 ;low power external crystal/resonator ;WATCHDOG equ 1 << 2 ;watchdog timer enabled ; default to disabled ;PROTECT equ 1 << 3 ;code protect enabled (inverted) ; default is to disable code protect ;OSC4MHZ equ %1000 << 4 ;internal 4MHz ;OSC2MHZ equ %1001 << 4 ;internal 2MHz ;OSC1MHZ equ %1010 << 4 ;internal 1MHz ;OSC500KHZ equ %1011 << 4 ;internal 500KHz ;OSC250KHZ equ %1100 << 4 ;internal 250KHz ;OSC125KHZ equ %1101 << 4 ;internal 125KHz ;OSC62KHZ equ %1110 << 4 ;internal 62.5KHz ;OSC31KHZ equ %1111 << 4 ;internal 31.25KHz ;STACKX equ 1 << 8 ;stack is extended to 8 levels (inverted) ; default to 2 levels ;OPTIONX equ 1 << 9 ;extend option register to 8 bits (inverted) ; default to 6 bits ;SYNC equ 1 << 10 ;input syncing enabled (inverted) ; default to disabled ;TURBO equ 1 << 11 ;turbo mode enabled (inverted) ; default to disabled ;PAGES1 equ %00 << 12 ;default ;PAGES2 equ %01 << 12 ;PAGES4 equ %10 << 12 ;PAGES8 equ %11 << 12 ;BANKS1 equ %00 << 14 ;default ;BANKS2 equ %01 << 14 ;BANKS4 equ %10 << 14 ;BANKS8 equ %11 << 14 ;BOR40 equ %11 << 16 ;4.0V brownout reset ;BOR25 equ %10 << 16 ;2.5 ;BOR13 equ %01 << 16 ;1.3 ;BOR00 equ %00 << 16 ;disabled (default, inverted) ;CARRYX equ 1 << 18 ;ADDWF & SUBWF use carry input (inverted) ; default is to ignore carry in ;PRE7 equ 1 << 19 ;for changing the preset FUSEX bit 7 (inverted) ; default is no change ;for modifying factory IRC calibration ;TRIM0 equ %0000 << 20 ;highest frequency ;TRIM3 equ %0001 << 20 ;TRIM6 equ %0010 << 20 ;TRIM9 equ %0011 << 20 ; about 3% per step ;TRIM12 equ %1000 << 20 ;TRIM15 equ %1001 << 20 ;TRIM18 equ %1010 << 20 ;TRIM21 equ %1011 << 20 ;lowest frequency (default) ;PINS18 equ %0 << 22 ;default to 18 pin ;PINS28 equ %1 << 22 int_off equ $c3 ; RTCC internal clock, prescale by 16, ; RTCC interrupt off, WDT disabled int_on equ $83 ; RTCC internal clock, prescale by 16, ; RTCC interrupt on, WDT disabled ;--------------------------------------------------------------------------- ; other includes ;--------------------------------------------------------------------------- ; ASCII character definitions for serial video display ; $Id ascii.inc,v 1.1 2001/01/03 20 06 47 eric Exp $ ; ; Copyright 2000, 2001 Eric Smith <eric@brouhaha.com> ; ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License version 2 as published ; by the Free Software Foundation. Note that permission is not granted ; to redistribute this program under the terms of any other version of the ; General Public License. ; ; This program is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; GNU General Public License for more details. ; ; You should have received a copy of the GNU General Public License ; along with this program; if not, write to the Free Software ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ; ; Licenses for non-GPL use may be negotiated with the author. asc_nul equ 00h asc_bel equ 07h asc_bs equ 08h asc_ht equ 09h asc_lf equ 0ah asc_ff equ 0ch asc_cr equ 0dh asc_so equ 0eh asc_si equ 0fh asc_esc equ 1ah asc_del equ 7fh ;--------------------------------------------------------------------------- ; video definitions ;--------------------------------------------------------------------------- ; Display size in characters. Note that simply changing these definitions ; won't have the desired effect. rows equ 4 columns equ 20 ; osc = 42,954,545 Hz = 12 * color burst ; tCYC = 23.2804 ns ; theoretical total width = 12 * 227.5 = 2730 cycles = 2 * 3 * 5 * 91 = 15 * 182 ; ; The RTCC prescaler can only be set for powers of two, and we need the ; count to be a little under 256, so we use a prescaler of 16 and a divisor ; of 171, for an actual scan line width of 2736 cycles (63.7 us). int_period equ 171 ; used by interrupt_done h equ 2736 ; 63.7 us hsync_pulse_width equ 201 ; 4.7 us equalization_pulse_width equ 98 ; 2.3 us serration_pulse_width equ 201 ; 4.7 us vsync_pulse_width equ (h/2)-serration_pulse_width front_porch_width equ 64 ; 1.5 us back_porch_width equ 193 ; 4.5 us ; safe area = 40 us = 1718 cycles ; ; 20 chars wide * (5+2) = 139 pixels wide, 12.4 cycles per pixel ; ("rounded" up to 13) ; ; for 4 3 aspect ratio, display should be 90 pixels tall, so make ; a pixel be 3 scan lines. scan_lines_per_vpixel equ 3 vpixels_per_char equ 10 chars_per_row equ 20 if ft_pal_video total_active_lines equ 287 else total_active_lines equ 242 endif active_video_lines equ rows*vpixels_per_char*scan_lines_per_vpixel top_border equ (total_active_lines-active_video_lines)/2 bottom_border equ total_active_lines-(top_border+active_video_lines) ;--------------------------------------------------------------------------- ; composite video definitions ;--------------------------------------------------------------------------- vid_port equ rb ; D/A converter ; DAC 0 = ground (sync tip), 255 = 1.25V into 75 ohm load ; one DAC step = 1.25/255 V = 4.902 mV ; there are 140 IRE units to 1.0V, so an IRE unit is 7.143 mV = 1.457 DAC steps vid_sync equ 0 ; -40 IRE vid_blank equ 58 ; 58.29 = 0 IRE vid_black equ 69 ; 69.21 = 7.5 IRE vid_white equ 204 ; 204.00 = 100 IRE vid_max_chroma equ 249 ; 249.17 = 131 IRE burst_amplitude equ 58 ; 58.29 = 40 IREs ;--------------------------------------------------------------------------- ; I/O port definitions ;--------------------------------------------------------------------------- rxd_bit equ 0 pzt_bit equ 1 txd_bit equ 2 ; not used mode_button_bit equ 3 ; not used rxd equ ra.rxd_bit pzt equ ra.pzt_bit txd equ ra.txd_bit mode_button equ ra.mode_button_bit trisa equ $01 ; RxD is our only input inita equ $00 trisb equ $00 ; all outputs initb equ vid_sync ;--------------------------------------------------------------------------- ; bell definitions ;--------------------------------------------------------------------------- ; The bell tone is nominally around 500 Hz for 200 ms (100 cycles). ; This works out to a period of 32 scan lines. bell_half_period equ 16 ; lines bell_duration equ 200 ; half-periods ;--------------------------------------------------------------------------- ; serial definitions ;--------------------------------------------------------------------------- ; While serial line idle, sample every scan line. Once start bit is ; detected, delay 6 scan lines, then sample every 13. This results ; in a 1208 bps rate, 0.6% fast. lines_per_serial_sample equ 13 skip_on_ser_rx_mark macro noexpand if ft_ser_noninv expand sb rxd noexpand else expand snb rxd noexpand endif endm skip_on_ser_rx_space macro noexpand if ft_ser_noninv expand snb rxd noexpand else expand sb rxd noexpand endif endm ;--------------------------------------------------------------------------- ; memory utilization ;--------------------------------------------------------------------------- rambase equ 08h ; start of RAM rombase equ 0000h ; beginning of program romsize equ 0800h chargen equ romsize-384 intvec equ 0000h ; interrupt vector main_page equ 0000h int_page equ 0200h ;--------------------------------------------------------------------------- ; shared variables ;--------------------------------------------------------------------------- org rambase ; start of RAM g_field_count ds 1 ; field down-counter g_mtemp ds 1 ; global temp for main ; "DelM" uses "DelMCnt" in the interupt. Do NOT use DelM or DelMCnt in main! DelMCnt ds 1 ; counter used for cycle delays Five ds 1 Fifteen ds 1 ;--------------------------------------------------------------------------- ; variables for main ;--------------------------------------------------------------------------- org 010h main_vars temp ds 3 char ds 1 ; character being processed escape_state ds 1 ; 0 = normal ; 1 = ESC seen, waiting for 2nd char ; 2 = ESC-Y seen, waiting for <col> ; 3 = ESC-Y <col> seen, waiting for <row> esc_Y_col ds 1 ; cursor cursor_col ds 1 cursor_row ds 1 cursor_loc ds 1 ; for scrolling src_addr equ temp dest_addr equ temp+1 move_count equ temp+2 ;--------------------------------------------------------------------------- ; variables for interrupt ;--------------------------------------------------------------------------- org 030h int_vars line_type ds 1 ; type of scan line we're working on ; 2 * [0 .. line_types-1] line_count ds 1 ; how many lines of this type to do if ft_color burst_phase ds 1 ; LSB used for burst phase int_temp ds 1 ; general use in interrupt endif line_start ds 1 ; start buffer loc of currently displayed line char_ptr ds 1 ; pointer to currently displayed character chargen_ptr ds 2 ; pointer into character generator inverse_flag ds 1 ; bit 7 indicates current char inverse vpix_cnt ds 1 ; vertical pixel counter scanline_cnt ds 1 ; vertical scan line counter (per pixel) char_cnt ds 1 pixels ds 1 ; pixels of current char ; bell bell_half_cyc ds 1 ; bell half-cycle in lines bell_line_cnt ds 1 ; bell half-cycle down-counter bell_dur_cnt ds 1 ; bell duration ;--------------------------------------------------------------------------- ; variables for serial receive ;--------------------------------------------------------------------------- if ft_serial_input org 050h ser_vars ser_rx_state ds 1 ser_rx_byte ds 1 ser_rx_samp_cnt ds 1 ser_rx_bit_cnt ds 1 ser_rx_char ds 1 ser_rx_flag ds 1 endif ;--------------------------------------------------------------------------- ; video buffer ;--------------------------------------------------------------------------- ; NOTE subtract offset of 20h (space) before storing characters into ; video buffer video_buffer equ 070h ; 80 characters, uses last five banks ; *must* start on a bank boundary ; reserve RAM, skipping over banks as needed res_bank_ram macro 1 ;res_bank_ram count noexpand local1 = \1 rept local1 expand ds 1 noexpand if ($ & 010h)=0 expand org $+010h noexpand endif endr endm org video_buffer line_0 res_bank_ram columns line_1 res_bank_ram columns line_2 res_bank_ram columns-1 line_2_end res_bank_ram 1 line_3 res_bank_ram columns-1 line_3_end res_bank_ram 1 org rombase page interrupt ; 0 jmp interrupt ; 1 escape_state_table mov W, escape_state add PC, W jmp esc_not_seen jmp esc_seen jmp esc_Y_col_seen jmp esc_Y_row_seen control_char_table mov W, char add PC, W jmp null ; 00 - NUL - null - don't do anything jmp null ; 01 - jmp null ; 02 - jmp null ; 03 - jmp null ; 04 - jmp null ; 05 - jmp null ; 06 - jmp bell ; 07 - BEL - bell jmp backspace ; 08 - BS - backspace jmp null ; 09 - jmp line_feed ; 0a - LF - line feed jmp null ; 0b - jmp form_feed ; 0c - FF - form feed - clear screen jmp carriage_return ; 0d - CR - carriage return jmp null ; 0e jmp null ; 0f jmp null ; 10 jmp null ; 11 jmp null ; 12 jmp null ; 13 jmp null ; 14 jmp null ; 15 jmp null ; 16 jmp null ; 17 jmp null ; 18 jmp null ; 19 jmp null ; 1a jmp escape ; 1b - ESC - escape jmp null ; 1c jmp null ; 1d jmp null ; 1e jmp null ; 1f esc_char_table add PC, W jmp bad_escape ; 40 - @ jmp cursor_up ; 41 - A - cursor up jmp cursor_down ; 42 - B - cursor down jmp cursor_left ; 43 - C - cursor left jmp cursor_right ; 44 - D - cursor right jmp bad_escape ; 45 - E jmp bad_escape ; 46 - F jmp bad_escape ; 47 - G jmp home_cursor ; 48 - H - cursor home jmp rev_line_feed ; 49 - I - reverse line feed (can scroll) jmp clear_eop ; 4A - J - clear to end of screen jmp clear_eol ; 4B - K - clear to end of line jmp bad_escape ; 4C - L jmp bad_escape ; 4D - M jmp bad_escape ; 4E - N jmp bad_escape ; 4F - O jmp bad_escape ; 50 - P jmp bad_escape ; 51 - Q jmp bad_escape ; 52 - R jmp bad_escape ; 53 - S jmp bad_escape ; 54 - T jmp bad_escape ; 55 - U jmp bad_escape ; 56 - V jmp bad_escape ; 57 - W jmp bad_escape ; 58 - X jmp esc_Y ; 59 - Y - cursor positioning jmp bad_escape ; 5A - Z jmp bad_escape ; 5B - [ jmp bad_escape ; 5C - jmp bad_escape ; 5D - ] jmp bad_escape ; 5E - ^ jmp bad_escape ; 5F - _ show_cursor mov W, cursor_loc mov fsr, W setb indf.7 bank main_vars ret hide_cursor mov W, cursor_loc mov fsr, W clrb indf.7 bank main_vars ret ; delay until either the number of fields specified in W have been ; displayed (zero flag set), or a serial character is received ; (zero flag clear) delay_fields bank ser_vars mov g_field_count, W df_loop if ft_serial_input test ser_rx_flag ; check serial receive flag sb status.zf ; character received? jmp df_return ; yes, return to caller endif test g_field_count ; has field count decremented to zero? sb status.zf jmp df_loop ; no, keep looping df_return bank main_vars ret home_cursor clr cursor_row carriage_return clr cursor_col compute_cursor_loc mov W, cursor_row ; cursor_loc = 20 * cursor_row mov cursor_loc, W clrb status.cf rl cursor_loc rl cursor_loc mov W, <>cursor_row add cursor_loc, W mov W, cursor_col ; cursor_loc += cursor_col add cursor_loc, W mov W, cursor_loc ; shift high nibble left one bit and W, #0f0h add cursor_loc, W mov W, #video_buffer ; add in base address add cursor_loc, W null ret ; output a character from W to the display output_char and W, #07fh ; strip MSB (parity?) and save mov char, W jmp escape_state_table ; process character esc_not_seen mov W, char and W, #060h ; is it a control character? snb status.zf jmp control_char_table ; yes, process and return mov W, char ; is it a DEL xor W, #asc_del snb status.zf ret ; yes, do nothing mov W, char ; fall into printable_char printable_char mov g_mtemp, W ; save character mov W, #-' ' ; remove offset add g_mtemp, W mov W, cursor_loc ; store character mov fsr, W mov W, g_mtemp mov indf, W bank main_vars ; fall into cursor_advance cursor_advance inc cursor_col mov W, cursor_col xor W, #columns sb status.zf jmp compute_cursor_loc crlf clr cursor_col line_feed inc cursor_row mov W, cursor_row xor W, #rows sb status.zf jmp compute_cursor_loc dec cursor_row ; restore call compute_cursor_loc scroll_up mov W, #line_1 mov src_addr, W mov W, #line_0 mov dest_addr, W mov W, #(rows-1)*columns mov move_count, W call block_move_up mov W, #line_3 ; clear freed space mov temp+1, W mov W, #columns mov temp, W jmp clear_chars block_move_up mov W, src_addr mov fsr, W mov W, indf mov g_mtemp, W bank main_vars inc src_addr setb src_addr.4 mov W, dest_addr mov fsr, W mov W, g_mtemp mov indf, W bank main_vars inc dest_addr setb dest_addr.4 decsz move_count jmp block_move_up ret backspace dec cursor_col sb cursor_col.7 jmp compute_cursor_loc mov W, #columns-1 mov cursor_col, W rev_line_feed dec cursor_row sb cursor_row.7 jmp compute_cursor_loc inc cursor_row ; restore call compute_cursor_loc scroll_down mov W, #line_2_end mov src_addr, W mov W, #line_3_end mov dest_addr, W mov W, #(rows-1)*columns mov move_count, W call block_move_down mov W, #line_0 ; clear freed space mov temp+1, W mov W, #columns mov temp, W jmp clear_chars block_move_down mov W, src_addr mov fsr, W mov W, indf mov g_mtemp, W bank main_vars dec src_addr snb src_addr.4 jmp bmd_1 mov W, #010h sub src_addr, W bmd_1 mov W, dest_addr mov fsr, W mov W, g_mtemp mov indf, W bank main_vars dec dest_addr snb dest_addr.4 jmp bmd_2 mov W, #010h sub dest_addr, W bmd_2 decsz move_count jmp block_move_down ret clear_eol mov W, #columns ; compute number of chars to clear mov temp, W ; temp = columns - cursor_col mov W, cursor_col sub temp, W mov W, cursor_loc mov temp+1, W ; clear temp chars starting at loc temp+1 clear_chars mov W, #' '-020h mov g_mtemp, W ; fill temp chars starting at loc temp+1 to value temp+2 fill_chars mov W, temp+1 mov fsr, W mov W, g_mtemp mov indf, W bank main_vars inc temp+1 setb temp+1.4 decsz temp jmp fill_chars ret form_feed call home_cursor clear_eop call clear_eol ; clear to end of current line mov W, #rows-1 ; compute additional rows to clear mov temp, W ; temp = (rows - 1) - cursor_row mov W, cursor_row sub temp, W snb status.zf ; any rows to clear? ret ; no clrb status.cf ; multiply temp by 20 to get char count rl temp clrb status.cf rl temp mov W, temp clrb status.cf rl temp clrb status.cf rl temp add temp, W jmp fill_chars cursor_up dec cursor_row mov W, #rows-1 snb cursor_row.7 mov cursor_row, W jmp compute_cursor_loc cursor_down inc cursor_row snb cursor_row.2 ; hard-coded for 4 rows clr cursor_row jmp compute_cursor_loc cursor_left dec cursor_col mov W, #columns-1 snb cursor_col.7 mov cursor_col, W jmp compute_cursor_loc cursor_right inc cursor_col mov W, cursor_col xor W, #columns snb status.zf clr cursor_row jmp compute_cursor_loc esc_Y mov W, #2 mov escape_state, W bad_escape ret esc_Y_col_seen mov W, #' ' mov W, char-w mov esc_Y_col, W inc escape_state ret escape inc escape_state ret esc_Y_row_seen mov W, #(256-' ')-rows ; range check the row (still has ' ' offset) add W, char snb status.cf jmp bad_row mov W, #' ' ; move cursor to specified column mov W, char-w mov cursor_row, W bad_row mov W, #256-columns ; range check the column add W, esc_Y_col snb status.cf jmp bad_col mov W, esc_Y_col ; move cursor to specified column mov cursor_col, W bad_col clr escape_state jmp compute_cursor_loc esc_seen clr escape_state ; assume only two-char sequence mov W, #$40 mov W, char-w mov temp, W and W, #060h ; check for range 40-5F sb status.zf jmp bad_escape mov W, temp jmp esc_char_table bell bank int_vars ; start a bell mov W, #bell_half_period mov bell_half_cyc, W mov bell_line_cnt, W mov W, #bell_duration mov bell_dur_cnt, W bank main_vars ret reset_entry mode 0fh ; paranoia mov W, #int_off mov !OPTION, W bank main_vars mov W, #inita mov Ra, W mov W, #trisa mov !ra,w mov W, #initb mov Rb, W mov W, #trisb mov !rb,w clr escape_state call form_feed bank int_vars mov W, #5 ; set up for DelM macro mov Five, W mov W, #15 mov Fifteen, W clr line_type mov W, ++line_type ; get initial line count page line_dispatch call line_dispatch page $ mov line_count, W if ft_serial_input bank ser_vars clr ser_rx_state mov W, #1 mov ser_rx_samp_cnt, W clr ser_rx_flag endif bank main_vars mov W, #int_on mov !OPTION, W if ft_splash page splash call splash endif ;call home_cursor main_loop call show_cursor if ft_pal_video mov W, #25 else mov W, #30 endif call delay_fields if ft_serial_input sb status.zf jmp got_char endif call hide_cursor if ft_pal_video mov W, #25 else mov W, #30 endif call delay_fields if ft_serial_input sb status.zf jmp got_char endif jmp main_loop if ft_serial_input got_char call hide_cursor ; hide cursor during character processing bank ser_vars ; get character and clear rx flag mov W, ser_rx_char clr ser_rx_flag bank main_vars call output_char jmp main_loop endif ;--------------------------------------------------------------------------- ; interrupt handler ;--------------------------------------------------------------------------- org 0200h ; 30-DEC-2000 Eric Smith ; changed for GPASM assembler ;6-JAN-2000 Richard Ottosen ;This routine is for the SX parts in Turbo mode only. It does not matter if the ; Carry fuse is set or clear. ; ;Macro to delay for M number of cycles from 0 through 65535. ; The macro includes paging for long calls. ; ;Uses the routine "DelW" to do the short delays and uses the variable "DelMCnt" ; as well for long delays. ;The constants 5 and 15 must be loaded into variables "Five" and "Fifteen" ; before DelM is used. ; ; DelM MACRO 1 ;DelM _MM noexpand local2 = \1 IF (local2 & $FF)=0 ;No delay at all ENDIF IF (local2 & $FF)=1 nop ;Delay 1 cycle inline ENDIF IF (local2 & $FF)=2 nop ;Delay 2 cycles inline nop ENDIF IF (local2 & $FF)=3 jmp $+1 ;Delay 3 cycles inline ENDIF IF (local2 & $FF)=4 jmp $+1 ;Delay 4 cycles inline nop ENDIF IF (local2 & $FF)=5 jmp $+1 ;Delay 5 cycles inline nop nop ENDIF IF (local2 & $FF)=6 jmp $+1 ;Delay 6 cycles inline jmp $+1 ENDIF IF (local2 & $FF)=7 PAGE Delay6 call Delay6 ;Delay 7 cycles ENDIF IF (local2 & $FF)=8 PAGE Delay7 call Delay7 ;Delay 8 cycles ENDIF IF (local2 & $FF)=9 PAGE Delay8 call Delay8 ;Delay 9 cycles ENDIF IF (local2 & $FF)=10 PAGE Delay9 call Delay9 ;Delay 10 cycles ENDIF IF (local2 & $FF)=11 PAGE Delay10 call Delay10 ;Delay 11 cycles ENDIF IF (local2 & $FF)=12 PAGE Delay11 call Delay11 ;Delay 12 cycles ENDIF IF (local2 & $FF)=13 PAGE Delay12 call Delay12 ;Delay 13 cycles ENDIF IF (local2 & $FF)=14 PAGE Delay13 call Delay13 ;Delay 14 cycles ENDIF IF (local2 & $FF)=15 PAGE Delay14 call Delay14 ;Delay 15 cycles ENDIF IF (local2 & $FF)=16 PAGE Delay15 call Delay15 ;Delay 16 cycles ENDIF IF (local2 & $FF)>16 mov W, #((local2-1) & $FF) PAGE DelW call DelW ;Delay for 17 thru 255 cycles ENDIF IF (local2 >> 8)<>0 mov W, #(local2 >> 8) ;Delay more for greater than 255 cycles mov DelMCnt, W ;_DelMLoop mov W, #251 PAGE DelW call DelW decsz DelMCnt jmp $-4 ;jmp _DelMLoop ENDIF ENDM ; original gpasm source macro by Eric Smith 7/8/96 Hacked by Richard Ottosen 8/8/99 ; converted to sx-key mnenomics by Peter Verkaik ;----------------------------------------------------------------------------- ;This version of DelW is for the Scenix parts in Turbo mode. It does not matter ;if the Carry fuse is set or clear. ; DelW delays W cycles, including call, return, and one cycle for the ; mov W, #instruction to set up the count in W ; range is 16..255 ; ; For example, the sequence ; mov W, #17 ; call DelW ; will take 17 cycles to execute ;----------------------------------------------------------------------------- ; W value on entry 16 17 18 19 20 21 22 23 ; Caller's instructions --- --- --- --- --- ----- ----- ----- ; mov W, #n 0 0 0 0 0 0 0 0 ; call DelW 1 1 1 1 1 1 1 1 DelW setb status.cf ; 4 4 4 4 4 4 4 4 mov W, Fifteen-w ; 5 5 5 5 5 5 5 5 _DelWLp add W, Five ; 6 6 6 6 6 6 11 7 11 7 11 sb status.cf ; 7 7 7 7 7 7 12 12 12 jmp _DelWLp ; 8 8 8 clrb status.cf ; 9 9 9 9 9 14 14 14 add PC, W ; 10 10 10 10 10 15 15 15 Delay10 nop ; 13 Delay9 nop ; 13 14 Delay8 nop ; 13 14 15 18 Delay7 nop ; 13 14 15 16 18 19 Delay6 retp ; 13 14 15 16 17 18 19 20 ; 16 17 18 19 20 21 22 23 Delay15 nop Delay14 nop Delay13 nop Delay12 nop Delay11 jmp Delay8 scanln macro 2 ;scanln count,function expand jmp \2 ;jmp function retw \1 ;retw count noexpand endm ; table of line type function pointers and counts ; when called for function, takes cycles 58-63 line_dispatch add PC, W ; 58 if ft_pal_video ; PAL lines scanln 2,equalization_line ; 624-625 scanln 2,vsync_line ; 1-2 scanln 1,vsync_eq_line ; 3 scanln 2,equalization_line ; 4-5 scanln 17,vblank_line ; 6-22 scanln 1,vblank_black_line ; 23 scanln top_border,black_video_line ; 24-106 scanln active_video_lines,active_video_line ; 107-226 scanln bottom_border-1,black_video_line ; 227-309 if ft_interlace scanln 1,black_video_line ; 310 scanln 2,equalization_line ; 311-312 scanln 1,eq_vsync_line ; 313 scanln 2,vsync_line ; 314-315 scanln 2,equalization_line ; 316-317 scanln 1,eq_vblank_line ; 318 scanln 17,vblank_line ; 319-335 scanln top_border,black_video_line ; 336-418 scanln active_video_lines,active_video_line ; 419-538 scanln bottom_border,black_video_line ; 539-622 endif scanln 1,black_eq_line ; 310 or 623 else ; NTSC lines scanln 3,equalization_line ; 1-3 scanln 3,vsync_line ; 4-6 scanln 3,equalization_line ; 7-9 scanln 11,vblank_line ; 10-20 scanln top_border,black_video_line ; 21-81 scanln active_video_lines,active_video_line ; 82-201 scanln bottom_border,black_video_line ; 202-262 if ft_interlace scanln 1,black_eq_line ; 263 scanln 2,equalization_line ; 264-265 scanln 1,eq_vsync_line ; 266 scanln 2,vsync_line ; 267-268 scanln 1,vsync_eq_line ; 269 scanln 2,equalization_line ; 270-271 scanln 1,eq_vblank_line ; 272 scanln 10,vblank_line ; 273-282 scanln 1,vblank_black_line ; 283 scanln top_border,black_video_line ; 284-344 scanln active_video_lines,active_video_line ; 345-464 scanln bottom_border,black_video_line ; 465-525 endif endif line_types equ (($-line_dispatch)-1)/2 if ft_serial_input ; serial input state machine dispatch serial_state_table mov W, ser_rx_state ; 12 add PC, W ; 13-15 jmp ser_idle ; 16-18 jmp ser_data_bit ; 16-18 jmp ser_stop_bit ; 16-18 endif bell_48 clrb pzt ; 48 delm 1 ; 49 bell_50 delm 1 ; 50 jmp bell_done ; 51-53 interrupt mov W, #vid_blank ; 4 start front porch mov vid_port, W ; 5 if ft_serial_input bank ser_vars ; 6 decsz ser_rx_samp_cnt ; 7 jmp skip_serial ; 8-10 call serial_state_table ; 9-11 jmp serial_done ; 39-41 skip_serial delm 31 ; 11-41 serial_done else delm 36 ; 6-41 endif bank int_vars ; 42 test bell_dur_cnt ; 43 - bell active? snb status.zf ; 44 jmp bell_48 ; 45-47 - no decsz bell_line_cnt ; 46 - time to toggle PZT? jmp bell_50 ; 47-49 - no mov W, #1<<pzt_bit ; 48 - toggle PZT xor Ra, W ; 49 dec bell_dur_cnt ; 50 - decrement duration mov W, bell_half_cyc ; 51 - reinit line count mov bell_line_cnt, W ; 52 delm 1 ; 53 bell_done mov W, line_type ; 54 call line_dispatch ; 55-57 decsz line_count ; any more lines of the current type? jmp interrupt_done ; no, done inc line_type ; advance to next line type inc line_type mov W, line_type ; end of field? xor W, #line_types*2 sb status.zf jmp get_line_count ; no clr line_type ; yes, start new field test g_field_count ; decrement field counter sb status.zf dec g_field_count get_line_count mov W, ++line_type ; new line type, how many lines? call line_dispatch mov line_count, W interrupt_done mov W, #256-int_period ; all done with this scan line retiw ; at some point within the frame before the first active video line, ; call this subroutine to initialize the pointers display_frame_setup mov W, #video_buffer mov line_start, W clr vpix_cnt mov W, #scan_lines_per_vpixel mov scanline_cnt, W ret if ft_color burst_l equ vid_blank-(burst_amplitude/2) burst_h equ vid_blank+(burst_amplitude/2) burst_x equ burst_l^burst_h ; burst starts at 228 cycles from horizontal reference point, ; which is 292 cycles from our start of back porch. color_burst delm 14 ; 270-283 ; $$$ actually, don't toggle burst phase, because our current ; line timing is an integral multiple of the color carrier mov W, #0 ; 284 - toggle burst phase xor burst_phase, W ; 285 mov W, #18 ; 286 - 18 half-cycles of burst mov int_temp, W ; 287 mov W, #burst_h ; 288 - assume leading edge high snb burst_phase.0 ; 289 mov W, #burst_l ; 290 burst_loop xor W, #burst_x ; 291 399 mov vid_port, W ; 292 400 decsz int_temp ; 293 401 jmp burst_loop ; 294-296 402 delm 2 ; 403 mov W, #vid_blank ; 405 mov vid_port, W ; 406 delm 48 ; 407 ret ; 455-457 else color_burst delm 185 ; 270-454 ret ; 455-457 endif equalization_line mov W, #vid_sync ; 64 - start equalizing pulse mov vid_port, W delm equalization_pulse_width-2 mov W, #vid_blank ; end equalizing pulse mov vid_port, W delm ((h/2)-equalization_pulse_width)-2 eq_second_half mov W, #vid_sync ; start equalizing pulse mov vid_port, W delm equalization_pulse_width-2 mov W, #vid_blank ; end equalizing pulse mov vid_port, W ret vsync_line mov W, #vid_sync ; 64 - start vsync pulse mov vid_port, W delm vsync_pulse_width-2 mov W, #vid_blank ; end vsync pulse - start serration mov vid_port, W delm serration_pulse_width-2 vsync_second_half mov W, #vid_sync ; start vsync pulse mov vid_port, W delm vsync_pulse_width-2 mov W, #vid_blank ; end vsync pulse - start serration mov vid_port, W ret vblank_line mov W, #vid_sync ; 64 - start hsync pulse mov vid_port, W ; 65 delm hsync_pulse_width-2 ; 66-264 mov W, #vid_blank ; 265 - end hsync pulse mov vid_port, W ; 266 call color_burst ; 267-269 ret black_video_line mov W, #vid_sync ; 64 - start hsync pulse mov vid_port, W ; 65 delm hsync_pulse_width-2 ; 66-264 mov W, #vid_blank ; 265 - end hsync pulse, start back porch mov vid_port, W ; 266 call color_burst ; 267-269 mov W, #vid_black ; 458 - end back porch, start active video mov vid_port, W ; 459 jmp display_frame_setup ; $$$ not the best place for this? ; ret if ft_interlace|ft_pal_video ; NTSC line 263, PAL line 623 (interlaced), PAL line 310 (non-interlaced) black_eq_line mov W, #vid_sync ; 64 - start hsync pulse mov vid_port, W ; 65 delm hsync_pulse_width-2 ; 66-264 mov W, #vid_blank ; 265 - end hsync pulse, start back porch mov vid_port, W ; 266 call color_burst ; 267-269 mov W, #vid_black ; 458 - end back porch, start active video mov vid_port, W ; 459 delm ((h/2)-(hsync_pulse_width+back_porch_width))-5 jmp eq_second_half endif if ft_interlace ; NTSC line 266, PAL line 313 eq_vsync_line mov W, #vid_sync ; 64 - start equalizing pulse mov vid_port, W delm equalization_pulse_width-2 mov W, #vid_blank ; end equalizing pulse mov vid_port, W delm ((h/2)-equalization_pulse_width)-5 jmp vsync_second_half endif if ft_interlace|ft_pal_video ; NTSC line 269, PAL line 3 vsync_eq_line mov W, #vid_sync ; 64 - start vsync pulse mov vid_port, W delm vsync_pulse_width-2 mov W, #vid_blank ; end vsync pulse - start serration mov vid_port, W delm serration_pulse_width-5 jmp eq_second_half endif if ft_interlace ; NTSC line 272 - like an equalization, but a full line with only one pulse ; PAL line 318 eq_vblank_line mov W, #vid_sync ; 64 - start equalizing pulse mov vid_port, W delm equalization_pulse_width-2 mov W, #vid_blank ; end equalizing pulse mov vid_port, W ret endif if ft_interlace|ft_pal_video ; NTSC line 283, PAL line 23 vblank_black_line mov W, #vid_sync ; 64 - start hsync pulse mov vid_port, W ; 65 delm hsync_pulse_width-2 ; 66-264 mov W, #vid_blank ; 265 - end hsync pulse mov vid_port, W ; 266 call color_burst ; 267-269 delm ((h/2)+front_porch_width)-458 ; 458-1431 mov W, #vid_black ; 1432 - start active video mov vid_port, W ret endif active_video_line mov W, #vid_sync ; 64 - start hsync pulse mov vid_port, W ; 65 delm hsync_pulse_width-2 ; 66-264 mov W, #vid_blank ; 265 - end hsync pulse, start back porch mov vid_port, W ; 266 call color_burst ; 267-269 mov W, #vid_black ; 458 - end back porch, start active video mov vid_port, W ; 459 snb vpix_cnt.3 ; vpixel >= 8? jmp active_video_line_done delm 100 mov W, line_start mov char_ptr, W mov W, #chars_per_row+1 mov char_cnt, W ; leading dummy character is always blank, allows us to fill ; the pixel pipeline clr pixels character ; pixel 0 mov W, #vid_black ; 0 snb pixels.0 ; 1 mov W, #vid_white ; 2 mov vid_port, W ; 3 mov W, char_ptr ; 4 - get next character mov fsr, W ; 5 mov W, indf ; 6 bank int_vars ; 7 mov inverse_flag, W ; 8 and W, #07fh ; 9 mov chargen_ptr, W ; 10 mov W, --char_cnt ; 11 - increment buffer pointer sb status.zf ; 12 - unless we're at end of line inc char_ptr ; 13 - (due to pipeline, we pass through setb char_ptr.4 ; 14 - here columns+1 times) ; pixel 1 mov W, #vid_black ; 0 snb pixels.1 ; 1 mov W, #vid_white ; 2 mov vid_port, W ; 3 mov W, #(chargen/4)&0ffh ; 4 - add low part of chargen base add chargen_ptr, W ; 5 mov W, #(chargen/4)>>8 ; 6 - add high part of chargen base mov chargen_ptr+1, W ; 7 snb status.cf ; 8 inc chargen_ptr+1 ; 9 clrb status.cf ; 10 - rotate high bit of vpix_cnt into snb vpix_cnt.2 ; 11 - table address setb status.cf ; 12 rl chargen_ptr ; 13 rl chargen_ptr+1 ; 14 ; pixel 2 mov W, #vid_black ; 0 snb pixels.2 ; 1 mov W, #vid_white ; 2 mov vid_port, W ; 3 clrb status.cf ; 4 - rotate next bit of vpix_cnt into snb vpix_cnt.1 ; 5 - table address setb status.cf ; 6 rl chargen_ptr ; 7 rl chargen_ptr+1 ; 8 delm 6 ; 9-14 ; pixel 3 mov W, #vid_black ; 0 snb pixels.3 ; 1 mov W, #vid_white ; 2 mov vid_port, W ; 3 DelM 11 ; 4-14 ; pixel 4 mov W, #vid_black ; 0 snb pixels.4 ; 1 mov W, #vid_white ; 2 mov vid_port, W ; 3 mov W, chargen_ptr+1 ; 4 mov m,w ; 5 mov W, chargen_ptr ; 6 iread ; 7-10 mov pixels, W ; 11 mov w,m ; 12 mode 0fh ; 13 mov chargen_ptr, W ; 14 - now use chargen_ptr as a temp ; intercharacter space snb vpix_cnt.0 ; 0 - get left four pixels into bits 0..3 swap pixels ; 1 mov W, #vid_black ; 2 mov vid_port, W ; 3 clrb pixels.4 ; 4 snb vpix_cnt.0 ; 5 - get rightmost pixel into bit 4 rr chargen_ptr ; 6 snb chargen_ptr.0 ; 7 setb pixels.4 ; 8 mov W, #01fh ; 9 - invert if needed snb inverse_flag.7 ; 10 xor pixels, W ; 11 ; $$$ add more inter-character spacing here? decsz char_cnt ; 12 jmp character ; 13-15 active_video_line_done decsz scanline_cnt ; more scan lines for this pixel row? ret mov W, #scan_lines_per_vpixel mov scanline_cnt, W inc vpix_cnt ; more pixels for this character row? mov W, vpix_cnt xor W, #vpixels_per_char sb status.zf ret clr vpix_cnt mov W, char_ptr ; advance buffer pointer to next character row mov line_start, W ret ;--------------------------------------------------------------------------- ; serial receive routine ;--------------------------------------------------------------------------- if ft_serial_input ser_idle mov W, #1 ; 19 - sample every line mov ser_rx_samp_cnt, W ; 20 skip_on_ser_rx_mark ; 21 - start bit detected? jmp ser_ret_25 ; 22-24 - no, return mov W, #lines_per_serial_sample * 3 / 2 ; 23 mov ser_rx_samp_cnt, W ; 24 - skip start bit and sample first data bit ; in middle of bit time mov W, #8 ; 25 - set up to receive 8 chars mov ser_rx_bit_cnt, W ; 26 clr ser_rx_byte ; 27 - not needed for 8-bit chars inc ser_rx_state ; 28 - advance to next state jmp ser_ret_32 ; 29-31 ser_data_bit clrb status.cf ; 19 - read a bit skip_on_ser_rx_mark ; 20 setb status.cf ; 21 rr ser_rx_byte ; 22 - rotate into byte mov W, #lines_per_serial_sample ; 23 - set up for next sample mov ser_rx_samp_cnt, W ; 24 decsz ser_rx_bit_cnt ; 25 - all data bits read? jmp ser_ret_29 ; 26-28 - no mov W, ser_rx_byte ; 27 - move char to buffer mov ser_rx_char, W ; 28 inc ser_rx_flag ; 29 - signal main mov W, #(lines_per_serial_sample * 11)/8 ; 30 - set up for stop bit mov ser_rx_samp_cnt, W ; 31 inc ser_rx_state ; 32 - advance to next state jmp ser_ret_36 ; 33-35 ser_stop_bit mov W, #1 ; 19 - sample every line mov ser_rx_samp_cnt, W ; 20 skip_on_ser_rx_mark ; 21 - line idle? clr ser_rx_state ; 22 - yes, back to idle ser_ret_23 delm 2 ; 23-24 ser_ret_25 delm 4 ; 25-28 ser_ret_29 delm 3 ; 29-31 ser_ret_32 delm 4 ; 32-35 ser_ret_36 ret ; 36-38 endif ;--------------------------------------------------------------------------- ; splash screen ;--------------------------------------------------------------------------- if ft_splash org 400h splash_table add PC, W dw asc_bel ; 01234567890123456789 dw 'SERVID 0.2 Copyright' dw '2001 Eric Smith and', asc_cr, asc_lf dw 'Richard Ottosen', asc_cr, asc_lf dw '(SXLIST challenge) ' dw 0 splash clr temp+2 splash_loop mov W, temp+2 call splash_table xor W, #0 snb status.zf retp page output_char call output_char ; $$$ change to end with retp? page $ inc temp+2 jmp splash_loop endif ;--------------------------------------------------------------------------- ; character generator macros ;--------------------------------------------------------------------------- org chargen cg_row1 macro 1 ;cg_row1 pixels noexpand char1 = \1 r1_bits = 0 rept 5 r1_bits = (r1_bits*2)+(char1//10) char1 = char1/10 endr endm cg_row2 macro 1 ;cg_row2 pixels noexpand char2 = \1 r2_bits = 0 rept 5 r2_bits = (r2_bits*2)+(char2//10) char2 = char2/10 endr expand dw ((r1_bits&010h)<<4)+(r1_bits&0fh)+((r2_bits&010h)<<5)+((r2_bits&0fh)<<4) noexpand endm ; SERVID character set ; $Id charset.inc,v 1.4 2001/01/04 04 58 40 eric Exp $ ; ; Copyright 2001 Richard Ottosen and Loren Blaney ; ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License version 2 as published ; by the Free Software Foundation. Note that permission is not granted ; to redistribute this program under the terms of any other version of the ; General Public License. ; ; This program is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; GNU General Public License for more details. ; ; You should have received a copy of the GNU General Public License ; along with this program; if not, write to the Free Software ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ; ; Licenses for non-GPL use may be negotiated with the authors. ; ; originally from Bion as a vertical font ; used by Richard Ottosen's Whirlygig ; rotated to horizontal form by Loren Blaney ; munged for SERVID by Richard Ottosen cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;20h cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00000 cg_row1 00100 cg_row2 00000 ;21h cg_row1 01010 cg_row2 01010 cg_row1 01010 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;22h cg_row1 01010 cg_row2 01010 cg_row1 11111 cg_row2 01010 cg_row1 11111 cg_row2 01010 cg_row1 01010 cg_row2 00000 ;23h cg_row1 00100 cg_row2 01111 cg_row1 10100 cg_row2 01110 cg_row1 00101 cg_row2 11110 cg_row1 00100 cg_row2 00000 ;24h cg_row1 11000 cg_row2 11001 cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 10011 cg_row1 00011 cg_row2 00000 ;25h cg_row1 01000 cg_row2 10100 cg_row1 10100 cg_row2 01000 cg_row1 10101 cg_row2 10010 cg_row1 01101 cg_row2 00000 ;26h cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;27h cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 01000 cg_row1 01000 cg_row2 00100 cg_row1 00010 cg_row2 00000 ;28h cg_row1 01000 cg_row2 00100 cg_row1 00010 cg_row2 00010 cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 00000 ;29h cg_row1 00100 cg_row2 10101 cg_row1 01110 cg_row2 00100 cg_row1 01110 cg_row2 10101 cg_row1 00100 cg_row2 00000 ;2Ah cg_row1 00000 cg_row2 00100 cg_row1 00100 cg_row2 11111 cg_row1 00100 cg_row2 00100 cg_row1 00000 cg_row2 00000 ;2Bh cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00100 cg_row2 00100 cg_row1 01000 cg_row2 00000 ;2Ch cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 11111 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;2Dh cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00100 cg_row2 00000 ;2Eh cg_row1 00000 cg_row2 00001 cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 10000 cg_row1 00000 cg_row2 00000 ;2Fh cg_row1 01110 cg_row2 10001 cg_row1 10011 cg_row2 10101 cg_row1 11001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;30h cg_row1 00100 cg_row2 01100 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 01110 cg_row2 00000 ;31h cg_row1 01110 cg_row2 10001 cg_row1 00001 cg_row2 00110 cg_row1 01000 cg_row2 10000 cg_row1 11111 cg_row2 00000 ;32h cg_row1 11111 cg_row2 00001 cg_row1 00010 cg_row2 00110 cg_row1 00001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;33h cg_row1 00010 cg_row2 00110 cg_row1 01010 cg_row2 10010 cg_row1 11111 cg_row2 00010 cg_row1 00010 cg_row2 00000 ;34h cg_row1 11111 cg_row2 10000 cg_row1 11110 cg_row2 00001 cg_row1 00001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;35h cg_row1 00111 cg_row2 01000 cg_row1 10000 cg_row2 11110 cg_row1 10001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;36h cg_row1 11111 cg_row2 00001 cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 01000 cg_row1 01000 cg_row2 00000 ;37h cg_row1 01110 cg_row2 10001 cg_row1 10001 cg_row2 01110 cg_row1 10001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;38h cg_row1 01110 cg_row2 10001 cg_row1 10001 cg_row2 01111 cg_row1 00001 cg_row2 00010 cg_row1 11100 cg_row2 00000 ;39h cg_row1 00000 cg_row2 00000 cg_row1 00100 cg_row2 00000 cg_row1 00100 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;3Ah cg_row1 00000 cg_row2 00000 cg_row1 00100 cg_row2 00000 cg_row1 00100 cg_row2 00100 cg_row1 01000 cg_row2 00000 ;3Bh cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 10000 cg_row1 01000 cg_row2 00100 cg_row1 00010 cg_row2 00000 ;3Ch cg_row1 00000 cg_row2 00000 cg_row1 11111 cg_row2 00000 cg_row1 11111 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;3Dh cg_row1 01000 cg_row2 00100 cg_row1 00010 cg_row2 00001 cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 00000 ;3Eh cg_row1 01110 cg_row2 10001 cg_row1 00010 cg_row2 00100 cg_row1 00100 cg_row2 00000 cg_row1 00100 cg_row2 00000 ;3Fh cg_row1 01110 cg_row2 10001 cg_row1 10101 cg_row2 10111 cg_row1 10110 cg_row2 10000 cg_row1 01111 cg_row2 00000 ;40h cg_row1 00100 cg_row2 01010 cg_row1 10001 cg_row2 10001 cg_row1 11111 cg_row2 10001 cg_row1 10001 cg_row2 00000 ;41h cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 11110 cg_row1 10001 cg_row2 10001 cg_row1 11110 cg_row2 00000 ;42h cg_row1 01110 cg_row2 10001 cg_row1 10000 cg_row2 10000 cg_row1 10000 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;43h cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 11110 cg_row2 00000 ;44h cg_row1 11111 cg_row2 10000 cg_row1 10000 cg_row2 11110 cg_row1 10000 cg_row2 10000 cg_row1 11111 cg_row2 00000 ;45h cg_row1 11111 cg_row2 10000 cg_row1 10000 cg_row2 11110 cg_row1 10000 cg_row2 10000 cg_row1 10000 cg_row2 00000 ;46h cg_row1 01111 cg_row2 10000 cg_row1 10000 cg_row2 10000 cg_row1 10011 cg_row2 10001 cg_row1 01111 cg_row2 00000 ;47h cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 11111 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 00000 ;48h cg_row1 01110 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 01110 cg_row2 00000 ;49h cg_row1 00001 cg_row2 00001 cg_row1 00001 cg_row2 00001 cg_row1 00001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;4Ah cg_row1 10001 cg_row2 10010 cg_row1 10100 cg_row2 11000 cg_row1 10100 cg_row2 10010 cg_row1 10001 cg_row2 00000 ;4Bh cg_row1 10000 cg_row2 10000 cg_row1 10000 cg_row2 10000 cg_row1 10000 cg_row2 10000 cg_row1 11111 cg_row2 00000 ;4Ch cg_row1 10001 cg_row2 11011 cg_row1 10101 cg_row2 10101 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 00000 ;4Dh cg_row1 10001 cg_row2 10001 cg_row1 11001 cg_row2 10101 cg_row1 10011 cg_row2 10001 cg_row1 10001 cg_row2 00000 ;4Eh cg_row1 01110 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;4Fh cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 11110 cg_row1 10000 cg_row2 10000 cg_row1 10000 cg_row2 00000 ;50h cg_row1 01110 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 10101 cg_row2 10010 cg_row1 01101 cg_row2 00000 ;51h cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 11110 cg_row1 10100 cg_row2 10010 cg_row1 10001 cg_row2 00000 ;52h cg_row1 01110 cg_row2 10001 cg_row1 10000 cg_row2 01110 cg_row1 00001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;53h cg_row1 11111 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00000 ;54h cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;55h cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 01010 cg_row1 00100 cg_row2 00000 ;56h cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 10101 cg_row1 10101 cg_row2 11011 cg_row1 10001 cg_row2 00000 ;57h cg_row1 10001 cg_row2 10001 cg_row1 01010 cg_row2 00100 cg_row1 01010 cg_row2 10001 cg_row1 10001 cg_row2 00000 ;58h cg_row1 10001 cg_row2 10001 cg_row1 01010 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00000 ;59h cg_row1 11111 cg_row2 00001 cg_row1 00010 cg_row2 00100 cg_row1 01000 cg_row2 10000 cg_row1 11111 cg_row2 00000 ;5Ah cg_row1 11111 cg_row2 11000 cg_row1 11000 cg_row2 11000 cg_row1 11000 cg_row2 11000 cg_row1 11111 cg_row2 00000 ;5Bh cg_row1 00000 cg_row2 10000 cg_row1 01000 cg_row2 00100 cg_row1 00010 cg_row2 00001 cg_row1 00000 cg_row2 00000 ;5Ch cg_row1 11111 cg_row2 00011 cg_row1 00011 cg_row2 00011 cg_row1 00011 cg_row2 00011 cg_row1 11111 cg_row2 00000 ;5Dh cg_row1 00000 cg_row2 00000 cg_row1 00100 cg_row2 01010 cg_row1 10001 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;5Eh cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 11111 cg_row2 00000 ;5Fh cg_row1 01000 cg_row2 00100 cg_row1 00010 cg_row2 00000 cg_row1 00000 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;60h cg_row1 00000 cg_row2 00000 cg_row1 01110 cg_row2 00001 cg_row1 01111 cg_row2 10001 cg_row1 01111 cg_row2 00000 ;61h cg_row1 10000 cg_row2 10000 cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 11110 cg_row2 00000 ;62h cg_row1 00000 cg_row2 00000 cg_row1 01111 cg_row2 10000 cg_row1 10000 cg_row2 10000 cg_row1 01111 cg_row2 00000 ;63h cg_row1 00001 cg_row2 00001 cg_row1 01111 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 01111 cg_row2 00000 ;64h cg_row1 00000 cg_row2 00000 cg_row1 01110 cg_row2 10001 cg_row1 11111 cg_row2 10000 cg_row1 01111 cg_row2 00000 ;65h cg_row1 00110 cg_row2 01001 cg_row1 01000 cg_row2 11110 cg_row1 01000 cg_row2 01000 cg_row1 01000 cg_row2 00000 ;66h cg_row1 00000 cg_row2 00000 cg_row1 01110 cg_row2 10001 cg_row1 10001 cg_row2 01111 cg_row1 00001 cg_row2 01110 ;67h cg_row1 10000 cg_row2 10000 cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 00000 ;68h cg_row1 00100 cg_row2 00000 cg_row1 01100 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 01110 cg_row2 00000 ;69h cg_row1 00010 cg_row2 00000 cg_row1 00010 cg_row2 00010 cg_row1 00010 cg_row2 00010 cg_row1 10010 cg_row2 01100 ;6Ah cg_row1 10000 cg_row2 10000 cg_row1 10010 cg_row2 10100 cg_row1 11000 cg_row2 10100 cg_row1 10010 cg_row2 00000 ;6Bh cg_row1 01100 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 01110 cg_row2 00000 ;6Ch cg_row1 00000 cg_row2 00000 cg_row1 11010 cg_row2 10101 cg_row1 10101 cg_row2 10101 cg_row1 10101 cg_row2 00000 ;6Dh cg_row1 00000 cg_row2 00000 cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 00000 ;6Eh cg_row1 00000 cg_row2 00000 cg_row1 01110 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 01110 cg_row2 00000 ;6Fh cg_row1 00000 cg_row2 00000 cg_row1 11110 cg_row2 10001 cg_row1 10001 cg_row2 11110 cg_row1 10000 cg_row2 10000 ;70h cg_row1 00000 cg_row2 00000 cg_row1 01111 cg_row2 10001 cg_row1 10001 cg_row2 01111 cg_row1 00001 cg_row2 00001 ;71h cg_row1 00000 cg_row2 00000 cg_row1 10110 cg_row2 11001 cg_row1 10000 cg_row2 10000 cg_row1 10000 cg_row2 00000 ;72h cg_row1 00000 cg_row2 00000 cg_row1 01111 cg_row2 10000 cg_row1 01110 cg_row2 00001 cg_row1 11110 cg_row2 00000 ;73h cg_row1 00100 cg_row2 00100 cg_row1 11111 cg_row2 00100 cg_row1 00100 cg_row2 00100 cg_row1 00011 cg_row2 00000 ;74h cg_row1 00000 cg_row2 00000 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 10001 cg_row1 01111 cg_row2 00000 ;75h cg_row1 00000 cg_row2 00000 cg_row1 10001 cg_row2 10001 cg_row1 10001 cg_row2 01010 cg_row1 00100 cg_row2 00000 ;76h cg_row1 00000 cg_row2 00000 cg_row1 10001 cg_row2 10101 cg_row1 10101 cg_row2 10101 cg_row1 01010 cg_row2 00000 ;77h cg_row1 00000 cg_row2 00000 cg_row1 10001 cg_row2 01010 cg_row1 00100 cg_row2 01010 cg_row1 10001 cg_row2 00000 ;78h cg_row1 00000 cg_row2 00000 cg_row1 10001 cg_row2 10001 cg_row1 01010 cg_row2 00100 cg_row1 01000 cg_row2 10000 ;79h cg_row1 00000 cg_row2 00000 cg_row1 11111 cg_row2 00010 cg_row1 00100 cg_row2 01000 cg_row1 11111 cg_row2 00000 ;7Ah cg_row1 00110 cg_row2 01000 cg_row1 01000 cg_row2 11000 cg_row1 01000 cg_row2 01000 cg_row1 00110 cg_row2 00000 ;7Bh cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00000 cg_row1 00100 cg_row2 00100 cg_row1 00100 cg_row2 00000 ;7Ch cg_row1 01100 cg_row2 00010 cg_row1 00010 cg_row2 00011 cg_row1 00010 cg_row2 00010 cg_row1 01100 cg_row2 00000 ;7Dh cg_row1 00000 cg_row2 00000 cg_row1 01000 cg_row2 10101 cg_row1 00010 cg_row2 00000 cg_row1 00000 cg_row2 00000 ;7Eh ;cg_row1 11111 ;cg_row2 11111 ;cg_row1 11111 ;cg_row2 11111 ;cg_row1 11111 ;cg_row2 11111 ;cg_row1 11111 ;cg_row2 11111 ;7Fh end
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