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23 lines
444 B
ArmAsm
23 lines
444 B
ArmAsm
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; Christian Groessler, 02-Apr-2019
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.export _bgcolor
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.include "atari.inc"
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_bgcolor:
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ldx COLOR2 ; get old value
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sta COLOR2 ; set new value
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and #$0e
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cmp #8
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bcs bright
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lda #$0e
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.byte $2c ; bit opcode, eats the next 2 bytes
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bright: lda #0
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sta COLOR1
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txa
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ldx #0 ; fix X
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rts
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