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cc65/libsrc/pce/vce.s

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.include "pce.inc"
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.export vce_init
.segment "INIT"
vce_init:
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; Set CTA to zero
stz VCE_ADDR_LO
stz VCE_ADDR_HI
ldy #$01
vce_clear_bank:
ldx #$00
vce_clear_color:
stz VCE_DATA_LO ; Clear color (LSB)
stz VCE_DATA_HI ; Clear color (MSB)
dex
bne vce_clear_color
dey
bne vce_clear_bank
rts