source:
trunk/minix/lib/i86/misc/io_inb.s@
12
Last change on this file since 12 was 9, checked in by , 14 years ago | |
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File size: 223 bytes |
Rev | Line | |
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[9] | 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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