48 lines
506 B
ArmAsm
48 lines
506 B
ArmAsm
.sect .text; .sect .rom; .sect .data; .sect .bss
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.sect .text
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.define printc,printd,prints
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SIO_D = 0xD8
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SIO_S = 0xDA
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TXRDY = 0x01
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! argument in ax
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! uses bx
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prints:
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xchg ax,bx
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1:
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movb al,(bx)
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inc bx
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testb al,al
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jz 2f
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call printc
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jmp 1b
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2:
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ret
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! argument in ax
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! uses cx and dx
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printd:
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xor dx,dx
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mov cx,10
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div cx
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test ax,ax
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jz 1f
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push dx
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call printd
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pop dx
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1:
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xchg ax,dx
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addb al,'0'
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! argument in ax
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printc:
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push ax
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1:
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inb SIO_S
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andb al,TXRDY
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jz 1b
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pop ax
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outb SIO_D
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ret
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