48 lines
608 B
NASM
48 lines
608 B
NASM
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.MACRO Spin_Loop ARGS XCOUNT
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ldx #XCOUNT
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lvl3\@:
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lda #$ff
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lvl2\@:
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xba
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lda #$ff
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lvl1\@:
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dea
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cmp #$00
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bne lvl1\@
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xba
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dea
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cmp #$00
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bne lvl2\@
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dex
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txa
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cmp #$00
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bne lvl3\@
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.ENDM
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.MACRO Set_A_8_XY_16
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; 16-bit xy, 8-bit a
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rep #%00010000
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sep #%00100000
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.ENDM
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.MACRO Reset_Palette_Offset
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stz $2121
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.ENDM
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.MACRO Load_Palette_Color ARGS BYTE1 BYTE2
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lda #BYTE1
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sta $2122
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;lda #BYTE2
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;sta $2122
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.ENDM
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.MACRO Set_Screen_Brightness
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lda #\1
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sta $2100 ; $2100 is the screen brightness register
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.ENDM
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