mirror of
https://github.com/cc65/cc65.git
synced 2024-11-03 10:07:02 +00:00
36 lines
912 B
ArmAsm
36 lines
912 B
ArmAsm
|
;
|
||
|
|
; 2016-02-28, Groepaz
|
||
|
|
; 2017-06-15, Greg King
|
||
|
|
;
|
||
|
|
; unsigned char cpeekrevers (void);
|
||
|
|
;
|
||
|
|
|
||
|
|
.export _cpeekrevers
|
||
|
|
|
||
|
|
; Get a system-specific file.
|
||
|
|
; Note: The cbm610, and c128 targets need special
|
||
|
|
; versions that handle RAM banking and the 80-column VDC.
|
||
|
|
|
||
|
|
.if .def(__C16__)
|
||
|
|
.include "plus4.inc" ; both C16 and Plus4
|
||
|
|
.elseif .def(__C64__)
|
||
|
|
.include "c64.inc"
|
||
|
|
.elseif .def(__CBM510__)
|
||
|
|
.import CURS_X: zp, SCREEN_PTR: zp
|
||
|
|
.include "cbm510.inc"
|
||
|
|
.elseif .def(__PET__)
|
||
|
|
.include "pet.inc"
|
||
|
|
.elseif .def(__VIC20__)
|
||
|
|
.include "vic20.inc"
|
||
|
|
.endif
|
||
|
|
|
||
|
|
|
||
|
|
_cpeekrevers:
|
||
|
|
ldy CURS_X
|
||
|
|
lda (SCREEN_PTR),y ; get screen code
|
||
|
|
and #$80 ; get reverse bit
|
||
|
|
asl a
|
||
|
|
tax ; ldx #>$0000
|
||
|
|
rol a ; return boolean value
|
||
|
|
rts
|