2019-03-30 00:48:18 +01:00
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; important functions in this file: kprintf
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2019-03-31 14:22:42 +02:00
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; print a byte
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2019-03-30 00:48:18 +01:00
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; in: al
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2019-03-31 14:22:42 +02:00
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print8:
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push ax ; avoid destroying ah
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2019-03-30 00:48:18 +01:00
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push bx
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mov bx, 0x0000
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2019-03-31 14:22:42 +02:00
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aam 16 ; high nibble moved into ah, low nibble into al
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add ax, 0x3030
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push ax
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xchg al, ah
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call .nib
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pop ax
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call .nib
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2019-03-30 00:48:18 +01:00
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pop bx
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pop ax
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ret
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2019-03-31 14:22:42 +02:00
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.nib:
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2019-03-30 00:48:18 +01:00
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cmp al, 0x3a
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2019-03-31 14:22:42 +02:00
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jl .out
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2019-03-30 00:48:18 +01:00
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add al, 0x07
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2019-03-31 14:22:42 +02:00
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.out:
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mov ah, 0x0e
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int 0x10
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2019-03-30 00:48:18 +01:00
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ret
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; print a word
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; in: ax
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print16:
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xchg ah,al
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call print8
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xchg ah,al
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call print8
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ret
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