Files
open-roms/c64/kernal/screen/screen_get_cliped_pntr.s
T

20 lines
269 B
ArmAsm

#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Get PNTR value clipped to 0-39 range in .Y, sets flags to compare with 0, can trash .A
//
screen_get_clipped_PNTR:
ldy PNTR
cpy #40
bcc !+
tya
sbc #40
tay
!:
cpy #$00
rts
#endif // ROM layout