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cc65/libsrc/pce/kplot.s

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.export PLOT
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.include "pce.inc"
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.include "extzp.inc"
PLOT:
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bcs @getpos
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tya
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;clc ; already cleared
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adc _plotlo,x
sta SCREEN_PTR
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lda _plothi,x
adc #0
sta SCREEN_PTR+1
@getpos:
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ldx CURS_Y
ldy CURS_X
rts
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.rodata
_plotlo:
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.repeat screenrows,line
.byte <($0000+(line*$80))
.endrepeat
_plothi:
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.repeat screenrows,line
.byte >($0000+(line*$80))
.endrepeat
;-------------------------------------------------------------------------------
; force the init constructor to be imported
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.import initconio
conio_init = initconio