RETIW lit |
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Description: | Return from interrupt, compensate RTCC |
Operation: | PC, W, FSR and status = shadow register; RTCC += lit |
Flags affected: | none |
Registers affected: | RTCC PC |
Sources referenced: | lit |
Cycles: | 1 |
Opcode: | |
Details: | SX Users Manual page # 115 |
Microchip PIC syntax: | |
Notes: |
RETIW - Same as RETI but adds the contents of W to RTCC without affecting the prescaler. This provides a periodic interrupt that can be adjusted by 256 steps (minus the time it takes to execute the interrupt routine)
by Loren Blaney via Richard Ottosen
The RETIW instruction ADDS W to RTCC, not subtracts it as stated in Table 16-1 in SX Datasheet page 33
See also:
See:
file: /Techref/SCENIX/inst/retiw.htm, 2KB, , updated: 2018/11/6 12:52, local time: 2024/8/14 14:04,
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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