cc65/libsrc/c64/kplot.s

23 lines
600 B
ArmAsm

;
; Ullrich von Bassewitz, 2002-12-09, 2009-09-27
;
; PLOT replacement function for the C64. The kernal function in the -02 kernals
; does not set the pointer to the color RAM correctly, so we need to fix that.
;
.export PLOT
.scope KERNAL
.include "cbm_kernal.inc"
.endscope
.proc PLOT
bcs @L1
jsr KERNAL::PLOT ; Set cursor position using original ROM PLOT
jmp KERNAL::UPDCRAMPTR ; Set pointer to color RAM to match new cursor position
@L1: jmp KERNAL::PLOT ; Get cursor position
.endproc