37 lines
583 B
ArmAsm
37 lines
583 B
ArmAsm
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.export _waitvblank
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.import PALFLAG
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.import sys_bank, restore_bank
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.importzp vic
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.include "cbm510/cbm510.inc"
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_waitvblank:
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rts ; FIXME
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jsr sys_bank ; Switch to the system bank
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lda PALFLAG
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beq ntsc
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ldx #(312-24)-256
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.byte $2c
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ntsc:
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ldx #(262-2)-256
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sei
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ldy #VIC_CTRL1
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l1:
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lda (vic),y
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and #$80
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beq l1
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;?!?
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; ldy #VIC_HLINE
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; txa
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;l2:
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; cmp (vic),y
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; bcs l2
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cli
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jmp restore_bank
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