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29 lines
504 B
ArmAsm
29 lines
504 B
ArmAsm
;
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; Written by Groepaz <groepaz@gmx.net>
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;
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; void waitvsync (void);
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;
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.export _waitvsync
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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.inc"
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_waitvsync:
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jsr sys_bank ; Switch to the system bank
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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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bpl @l1
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@l2:
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lda (vic),y
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bmi @l2
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cli
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jmp restore_bank
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