2 * Copyright (c) 1998 Robert Nordier
5 * Redistribution and use in source and binary forms are freely
6 * permitted provided that the above copyright notice and this
7 * paragraph and the following disclaimer are duplicated in all
10 * This software is provided "AS IS" and without any express or
11 * implied warranties, including, without limitation, the implied
12 * warranties of merchantability and fitness for a particular
16 #include <sys/cdefs.h>
17 __FBSDID("$FreeBSD$");
19 #include <sys/param.h>
21 #include <machine/psl.h>
30 #define V86_ZR(x) ((x) & PSL_Z)
32 #define SECOND 18 /* Circa that many ticks in a second. */
34 uint8_t ioctrl = IO_KEYBOARD;
42 v86.eax = 0xe00 | (c & 0xff);
51 if (ioctrl & IO_KEYBOARD)
53 if (ioctrl & IO_SERIAL)
71 * The extra comparison against zero is an attempt to work around
72 * what appears to be a bug in QEMU and Bochs. Both emulators
73 * sometimes report a key-press with scancode one and ascii zero
74 * when no such key is pressed in reality. As far as I can tell,
75 * this only happens shortly after a reboot.
81 return fn == 0 ? v86.eax & 0xff : (!V86_ZR(v86.efl) && (v86.eax & 0xff));
88 if (OPT_CHECK(RBX_NOINTR))
91 if (ioctrl & IO_KEYBOARD && getc(1))
92 return (fn ? 1 : getc(0));
93 if (ioctrl & IO_SERIAL && sio_ischar())
94 return (fn ? 1 : sio_getc());
102 keyhit(unsigned int secs)
106 if (OPT_CHECK(RBX_NOINTR))
114 t1 = *(uint32_t *)PTOV(0x46c);
117 if (t1 < t0 || t1 >= t0 + secs)
125 getstr(char *cmdstr, size_t cmdstrsize)
132 switch (c = xgetc(0)) {
147 if (s - cmdstr < cmdstrsize - 1)