19 lines
343 B
ArmAsm
19 lines
343 B
ArmAsm
; Function defined on pp272-273 of C64 Programmers Reference Guide
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ioinit:
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; Set $00/$01 port mode and value
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; We want BASIC and KERNAL ROMs mapped, and datasette motor off
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; (https://www.c64-wiki.com/wiki/Zeropage)
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LDA #$2F
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STA $00
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LDA #$27
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STA $01
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;; Compute's Mapping the 64, p156
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lda #$0e
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sta $D020
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lda #$06
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sta $D021
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rts
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