You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
485 B
ArmAsm
31 lines
485 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 31.08.1998
|
|
;
|
|
; CC65 runtime: Push word from stack
|
|
;
|
|
|
|
.export pushb, pushbidx
|
|
.import pushax
|
|
.importzp ptr1
|
|
|
|
.macpack cpu
|
|
|
|
pushbidx:
|
|
sty ptr1
|
|
clc
|
|
adc ptr1
|
|
bcc pushb
|
|
inx
|
|
pushb: sta ptr1
|
|
stx ptr1+1
|
|
ldx #0 ; Load index/high byte
|
|
.if (.cpu .bitand CPU_ISET_65SC02)
|
|
lda (ptr1) ; Save one cycle for the C02
|
|
.else
|
|
lda (ptr1,x)
|
|
.endif
|
|
bpl L1
|
|
dex ; Make high byte FF
|
|
L1: jmp pushax
|
|
|