57 lines
776 B
NASM
57 lines
776 B
NASM
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console_hide_cursor:
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push ax
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push cx
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mov ah, 1
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mov cx, 0x1F1F
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int 0x10
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pop cx
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pop ax
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ret
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console_show_cursor:
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push ax
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push cx
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mov ah, 1
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mov cx, 0x001F
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int 0x10
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pop cx
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pop ax
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ret
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; Raw console i/o without echo
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; IN DL character to output or FF
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; OUT ZF if DL=FF: zero if character input
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; AL if not ZF: ascii char, otherwise corrupt
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console_io:
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cmp dl, 0xFF
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je .read
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push ax
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push bx
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mov al, dl
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mov ah, 0x0e
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xor bx, bx
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int 0x10
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pop bx
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pop ax
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ret
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.read:
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call console_show_cursor
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; if no character avail, exit with leaving
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; cursor displayed
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mov ah, 1
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int 0x16
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jz .end
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pushf
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; actually read character
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xor ax, ax
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int 0x16
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call console_hide_cursor
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; restore zero flag
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popf
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.end:
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ret
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