; 29.8.00
;
; @=$100 ; normal com programm
@=$200 ; batch binary
move.w #$82,r5 ; start after space
movu.bw -2.b(r5.w),r6 ; cmdline length
dec.w r6 ; char after space
_10: dec.w r6 ; char left?
bmi.b _100 ; no
move.b (r5.w),r0 ; next char from cmdline
inc.w r5
cmp.b #' ',r0 ; space ?
beq.b _10 ; yes, ignore
cmp.b #'e',r0 ; echo command?
beq.b echo ; yes
cmp.b #'+',r0 ; incr command
beq.b inc ; yes
_100: rts.w ; no other commands
inc: move.w r6,r2 ; length of number
dec.w r6 ; at least 1
bmi.b _100 ; no
move.w r5,r1 ; adr of first digit
add.w r6,r5 ; adr of last digit
_20: inc.b (r5.w) ; inc last digit
cmp.b #'9',(r5.w) ; now > 9?
bls.b _10 ; no: ok
move.b #'0',(r5.w) ; set 0
dec.w r5 ; go to preceding digit
dec.w r6 ; digits left?
bpl.b _20 ; yes
_10: bsr.w out1 ; all done
_100: rts.w
echo: move.w #buf,r1 ; write buffer
move.w #1,r2 ; write 1 char
_00: dec.w r6 ; chars left?
bmi.b _100 ; no
move.b (r5.w),r0 ; next char from cmdline
inc.w r5
cmp.b #'l',r0 ; lower case subcommand
bne.b _10 ; no
inc.b _200 ; yes: set flag >0
_10: cmp.b #'u',r0 ; upper case subcommand
bne.b _20 ; no
dec.b _200 ; yes: set flag <0
_20: cmp.b #'_',r0 ; space subcommand?
bne.b _21 ; no
inc.b _201 ; yes: set flag >0
_21: cmp.b #'.',r0 ; skip after . subcommand
bne.b _30 ; no
inc.b _202 ; remember number of . to skip
_30: cmp.b #':',r0 ; skip before . subcommand
bne.b _40 ; no
dec.b _202 ; remember number of . to skip
_40: cmp.b #' ',r0 ; space
bne.b _00 ; no: read more subcommands
_50: dec.w r6 ; chars left?
bmi.b _100 ; no
move.b (r5.w),r0 ; get next char
inc.w r5
cmp.b #'$',r0 ; start of hex value or date command
bne.b _60 ; no
cmp.b #'t',(r5.w) ; date command?
bne.b _51 ; no
dec.w r6 ; number of chars left
inc.w r5 ; adr of next char
move.b #$2a,m0 ; get date function
trap #$21 ; call dos
move.w r2,r0 ; year
divu.b c100,m0|r0 ; last 2 digits -> m0
lsr.w #8,r0 ; last 2 digits -> r0
move.w #buf,r3 ; adr of write buffer
bsr.w _500 ; output in write buffer
move.b m1,r0 ; month
bsr.w _500 ; output in write buffer
move.b r1,r0 ; day
bsr.w _500 ; output in write buffer
move.w #buf,r1 ; adr of write buffer
move.w #6,r2 ; write 6 char: yymmdd
bsr.w out1 ; write it
move.w #1,r2 ; restore 1
br.b _50 ; process next char
_51: bsr.w hex2bin ; convert hex to bin
bsr.w hex2bin ; convert hex to bin
_60: bsr.w out ; write it
br.b _50 ; process next char
_100: bsr.w in ; read char from stdin
bcs.b _199 ; if error
or.w r0,r0 ; 1 char read
beq.b _199 ; no
move.b buf,r0 ; read char -> r0
cmp.b #10,r0 ; LF
beq.b _100 ; yes: ignore
cmp.b #13,r0 ; CR
beq.b _198 ; read LF and exit
tst.b #$ff,_200 ; lower/upper case flag
beq.b _103 ; not set
bpl.b _104 ; convert to lower
cmp.b #'a',r0 ; >= a ?
blo.b _103 ; no: nothing to convert
cmp.b #'z',r0 ; <= z ?
bhi.b _103 ; no: nothing to convert
br.b _105 ; convert
_104: cmp.b #'A',r0 ; >= A ?
blo.b _103 ; no: nothing to convert
cmp.b #'Z',r0 ; <= Z ?
bhi.b _103 ; no: nothing to convert
_105: eor.b #$20,r0 ; convert
_103: tst.b #$ff,_201 ; space flag
beq.b _106 ; not set
cmp.b #' ',r0 ; space ?
bne.b _106 ; no: nothing to do
move.b #'_',r0 ; replace by _
_106: tst.b #$ff,_202 ; skip after/before . flag
beq.b _110 ; not set
bpl.b _111 ; skip after .
cmp.b #'.',r0 ; is this char a . ?
bne.b _100 ; no: nothing to do
inc.b _202 ; yes: decr number of . to skip
br.b _100 ; next char
_111: cmp.b #'.',r0 ; is this char a . ?
bne.b _110 ; no: write char
dec.b _202 ; yes: dec number of . to output
bne.b _110 ; if not 0: write .
move.b #$80,_202 ; will skip the next 128 .
br.b _100 ; next char
_110: bsr.w out ; write char to stdout
br.b _100 ; next char
_198: bsr.w in ; read LF
_199: rts.w ; exit
_200: dc.b 0 ; upper/lower flag
_201: dc.b 0 ; space flag
_202: dc.b 0 ; . flag
_500: divu.b c10,m0|r0 ; r0=high m0=low digit
add.w #'00',r0 ; convert to ascii
move.w r0,(r3.w) ; copy in write buffer
inc.w r3 ; inc write pointer
inc.w r3 ; inc write pointer
eor.w r0,r0 ; clear r0
rts.w
c100: dc.b 100 ; constant 100
c10: dc.b 10 ; constant 10
in: move.b #$3f,m0 ; read function
eor.w r3,r3 ; stdin
trap #$21 ; call dos
rts.w
out: move.b r0,buf ; copy char in write buffer
out1: move.b #$40,m0 ; write function
move.w #1,r3 ; stdout
trap #$21 ; call dos
rts.w
hex2bin:dec.w r6 ; decr. number of chars left
move.b (r5.w),m0 ; get next char
inc.w r5 ; incr pointer to next char
or.b #$20,m0 ; convert to lower case (A-F)
sub.b #'a'-10,m0 ; convert ascii to bin
bpl.b _10 ; all done if a-f
add.b #'a'-10-'0',m0 ; correct if 0-9
_10: lsl.b #4,r0 ; shift last nibble
add.b m0,r0 ; add new nibble
rts.w
buf: ; write buffer
| file: /Techref/DOS/echadd_mac.htm, 7KB, , updated: 2004/5/20 15:44, local time: 2024/12/25 18:01,
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