mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 04:30:10 +00:00
19 lines
411 B
ArmAsm
19 lines
411 B
ArmAsm
.interruptor ticktock, 24
|
|
|
|
.include "pce.inc"
|
|
.include "extzp.inc"
|
|
|
|
ticktock:
|
|
bbr5 vdc_flags,@s1 ; not vertical-blank interrupt
|
|
|
|
; Increment the system tick counter.
|
|
inc tickcount
|
|
bne @s1
|
|
inc tickcount+1
|
|
bne @s1
|
|
inc tickcount+2
|
|
bne @s1
|
|
inc tickcount+3
|
|
|
|
@s1: rts
|