mirror of
https://github.com/cc65/cc65.git
synced 2024-12-25 02:29:52 +00:00
25 lines
573 B
ArmAsm
25 lines
573 B
ArmAsm
;
|
|
; 2020-07-14, Groepaz
|
|
;
|
|
; char cpeekc (void);
|
|
;
|
|
; get character from current position, do NOT advance cursor
|
|
|
|
.export _cpeekc
|
|
|
|
.include "pce.inc"
|
|
.include "extzp.inc"
|
|
|
|
_cpeekc:
|
|
st0 #VDC_MARR ; Memory-Address Read
|
|
ldy SCREEN_PTR
|
|
ldx SCREEN_PTR+1
|
|
sty VDC_DATA_LO
|
|
stx VDC_DATA_HI
|
|
|
|
st0 #VDC_VRR ; VRAM Read Register
|
|
lda VDC_DATA_LO ; character
|
|
and #<~$80 ; remove reverse bit
|
|
ldx #0
|
|
rts
|