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419eb700b5
The way we want to use the INITBSS segment - and especially the fact that it won't have the type bss on all ROM based targets - means that the name INITBSS is misleading. After all INIT is the best name from my perspective as it serves several purposes and therefore needs a rather generic name. Unfortunately this means that the current INIT segment needs to be renamed too. Looking for a short (ideally 4 letter) name I came up with ONCE as it contains all code (and data) accessed only once during initialization.
21 lines
470 B
ArmAsm
21 lines
470 B
ArmAsm
.include "pce.inc"
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.export vce_init
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.segment "ONCE"
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vce_init:
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; Set CTA to zero
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stz VCE_ADDR_LO
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stz VCE_ADDR_HI
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ldy #$01
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vce_clear_bank:
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ldx #$00
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vce_clear_color:
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stz VCE_DATA_LO ; Clear color (LSB)
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stz VCE_DATA_HI ; Clear color (MSB)
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dex
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bne vce_clear_color
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dey
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bne vce_clear_bank
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rts
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