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https://github.com/jonthomasson/retro1.git
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54 lines
563 B
Plaintext
54 lines
563 B
Plaintext
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; Push A and X, destroys A
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.macro phax
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pha
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txa
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pha
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.endmacro
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; Push A and Y, destroys A
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.macro phay
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pha
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tya
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pha
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.endmacro
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; Push A, X and Y, destroys A
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.macro phaxy
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pha
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txa
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pha
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tya
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pha
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.endmacro
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; Pull A and X
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.macro plax
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pla
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tax
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pla
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.endmacro
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; Pull A and Y
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.macro play
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pla
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tay
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pla
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.endmacro
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; Pull A, X and Y
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.macro plaxy
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pla
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tay
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pla
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tax
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pla
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.endmacro
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; Load zero page register reg/reg+1 with the 16-bit value, destroys A
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.macro ld16 reg, value
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lda #<(value)
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sta reg
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lda #>(value)
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sta reg + 1
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.endmacro
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