50 lines
1.2 KiB
NASM
50 lines
1.2 KiB
NASM
; Set 8-bit accumulator
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setaxs .macro
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SEP #$30 ; set A&X short
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.as
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.xs
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.endm
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; Set 16-bit accumulator
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setaxl .macro
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REP #$30 ; set A&X long
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.al
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.xl
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.endm
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; Set 8-bit accumulator
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setas .macro
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SEP #$20 ; set A short
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.as
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.endm
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; Set 16-bit accumulator
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setal .macro
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REP #$20 ; set A long
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.al
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.endm
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; Set 8 bit index registers
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setxs .macro
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SEP #$10 ; set X short
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.xs
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.endm
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; Set 16-bit index registers
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setxl .macro
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REP #$10 ; set X long
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.xl
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.endm
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sdb .macro ; Set the B (Data bank) register
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pha ; begin setdbr macro
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php
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.setas
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lda #\1
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pha
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plb
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.databank \1
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plp
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pla ; end setdbr macro
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.endm
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