37 lines
477 B
ArmAsm
37 lines
477 B
ArmAsm
.define getchar, putchar
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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! These getchar and putchar routines can be used for HERMAC computer
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! Read a character from HERMAC-monitor
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! Character is returned in a-reg
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getchar:
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in 0xF1
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ani 1
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jz getchar
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in 0xF0
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cpi 0x0D
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jnz 1f
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mvi a,0x0A
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1: ret
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! Write character on HERMAC monitor
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! Assumes character in a-reg
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putchar:
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cpi 0x0A
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jnz 1f
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mvi a,0x1F
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1: push psw
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2: in 0xF1
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ani 4
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jz 2b
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pop psw
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out 0xF0
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ret
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