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cc65/libsrc/atari/cpeekrevers.s

19 lines
394 B
ArmAsm

;
; 2017-06-21, Greg King
;
; unsigned char cpeekrevers (void);
;
.export _cpeekrevers
.include "atari.inc"
_cpeekrevers:
lda OLDCHR ; get char under cursor
and #$80 ; get reverse bit
asl a
tax ; ldx #>$0000
rol a ; return boolean value
rts