diff options
Diffstat (limited to 'sys/i386/boot/io.c')
| -rw-r--r-- | sys/i386/boot/io.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/sys/i386/boot/io.c b/sys/i386/boot/io.c index 7cb6d02ba93a..29fd128c9ce7 100644 --- a/sys/i386/boot/io.c +++ b/sys/i386/boot/io.c @@ -1,3 +1,4 @@ + /* * Mach Operating System * Copyright (c) 1992, 1991 Carnegie Mellon University @@ -24,7 +25,7 @@ * the rights to redistribute these changes. * * from: Mach, Revision 2.2 92/04/04 11:35:57 rpd - * $Id: io.c,v 1.3 1993/10/16 19:11:36 rgrimes Exp $ + * $Id: io.c,v 1.6 1994/06/16 03:53:29 adam Exp $ */ #include <i386/include/pio.h> @@ -38,10 +39,10 @@ #define KC_CMD_WIN 0xd0 /* read output port */ #define KC_CMD_WOUT 0xd1 /* write output port */ -#define KB_A20 0x9f /* enable A20, +#define KB_A20 0xdf /* enable A20, enable output buffer full interrupt enable data line - disable clock line */ + enable clock line */ /* * Gate A20 for high memory @@ -137,13 +138,24 @@ getchar() return(c); } +#if BOOTWAIT +spinwait(i) +int i; +{ + while (--i >= 0) + (void)inb(0x84); +} +#endif + gets(buf) char *buf; { int i; char *ptr=buf; - for (i = 240000; i>0; i--) +#if BOOTWAIT + for (i = BOOTWAIT; i>0; spinwait(10000),i--) +#endif if (ischar()) for (;;) switch(*ptr = getchar() & 0xff) { |