mirror of
https://github.com/cc65/cc65.git
synced 2024-10-30 12:28:25 +00:00
419eb700b5
The way we want to use the INITBSS segment - and especially the fact that it won't have the type bss on all ROM based targets - means that the name INITBSS is misleading. After all INIT is the best name from my perspective as it serves several purposes and therefore needs a rather generic name. Unfortunately this means that the current INIT segment needs to be renamed too. Looking for a short (ideally 4 letter) name I came up with ONCE as it contains all code (and data) accessed only once during initialization.
34 lines
577 B
ArmAsm
34 lines
577 B
ArmAsm
;
|
|
; clock_t clock (void);
|
|
;
|
|
|
|
.include "gamate.inc"
|
|
.include "extzp.inc"
|
|
|
|
.export _clock
|
|
.forceimport ticktock
|
|
.importzp sreg
|
|
.constructor initclock
|
|
|
|
|
|
.proc _clock
|
|
|
|
lda tickcount+3
|
|
sta sreg+1
|
|
lda tickcount+2
|
|
sta sreg
|
|
ldx tickcount+1
|
|
lda tickcount
|
|
rts
|
|
|
|
.endproc
|
|
|
|
.segment "ONCE"
|
|
initclock:
|
|
lda #0
|
|
ldx #3
|
|
@lp: sta tickcount,x
|
|
dex
|
|
bpl @lp
|
|
rts
|