26 lines
720 B
NASM
26 lines
720 B
NASM
; "Hello World" in dasm assembler format.
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; This could actually be done in less code since the display
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; BIOS can output strings.
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; tpasm -l hello.out hello.asm -P 6502
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processor 6502
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ddata equ $ffa0 ; Display data address.
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dcommand equ $ffa1 ; Display command address.
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org $200 ; Code start.
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ldx #0 ; Starting index 0 in X register.
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printnext:
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lda text,x ; Get character from string.
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beq done ; If we read a 0 we're done.
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sta ddata ; Output character.
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lda #$7
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sta dcommand
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inx ; Increment index to next character.
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bne printnext ; Repeat if index doesn't overflow to 0.
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done:
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brk ; Just die.
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text:
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dc.b "Hello, world!", $00
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