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Switched to using tmp1 instead of self-mod to store the jiffies value

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ZeroByteOrg
2022-08-08 15:17:28 -05:00
parent 78870219a4
commit 9b3b652fa5
1 changed files with 3 additions and 3 deletions
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6
libsrc/cx16/waitvsync.s
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@@ -10,15 +10,15 @@
; ;
.export _waitvsync .export _waitvsync
.importzp tmp1
.proc _waitvsync: near .proc _waitvsync: near
RDTIM = $FFDE ; Kernal API for reading the jiffy timer RDTIM = $FFDE ; Kernal API for reading the jiffy timer
jsr RDTIM jsr RDTIM
sta lastjiffy sta tmp1
keep_waiting: keep_waiting:
jsr RDTIM jsr RDTIM
cmp #$FF ; self-mod the value returned by RDTIM to save memory cmp tmp1
lastjiffy=(*-1)
beq keep_waiting beq keep_waiting
rts rts
.endproc .endproc