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32 lines
663 B
Plaintext
32 lines
663 B
Plaintext
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;ACME 0.97
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; zp variables
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!addr ptr = $fb
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; kernal
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!addr k_chrout = $ffd2
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; print immediate - prints zero-terminated string located directly
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; after calling JSR. returns to opcode following the terminator.
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primm pla ; get low byte of return address - 1
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tay ; into Y
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pla ; get high byte of return address - 1
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sta ptr + 1 ; to ptr high
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lda #0 ; and zero ptr low, so "(ptr), y" points before text
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sta ptr
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beq @entry
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;;;
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--- jsr k_chrout
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@entry iny
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bne +
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; fix high byte
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inc ptr + 1
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+ lda (ptr), y
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bne ---
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; push updated address onto stack
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lda ptr + 1
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pha
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tya
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pha
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rts ; return to caller (after zero-terminated text)
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