source:
trunk/minix/lib/i86/misc/io_inb.s@
9
Last change on this file since 9 was 9, checked in by , 14 years ago | |
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File size: 223 bytes |
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1 | ! inb() - Input one byte Author: Kees J. Bot |
2 | ! 18 Mar 1996 |
3 | ! unsigned inb(U16_t port); |
4 | |
5 | .sect .text |
6 | .define _inb |
7 | _inb: |
8 | push bp |
9 | mov bp, sp |
10 | mov dx, 4(bp) ! port |
11 | inb dx ! read 1 byte |
12 | xorb ah, ah |
13 | pop bp |
14 | ret |
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