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- .define Mprint
- .sect .text
- .sect .rom
- .sect .data
- .sect .bss
- .sect .text
- ! This subroutine prints a zero terminated ascii string.
- ! The registerpair AX contains the start of the string.
- ! The subroutine WRCH is a special routine on the BBC microcomputer
- ! which prints the character in A to the screen.
- ! The subroutine WRCH is a special one provided by the BBC
- ! microcomputer.
- Mprint:
- stx ADDR ! start address of string (lowbyte)
- sta ADDR+1 ! start address of string (highbyte)
- ldy #0
- 1: lda (ADDR),y ! get ascii character
- beq 2f
- jsr WRCH ! put it on the screen
- iny
- bne 1b
- 2: rts
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