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Fix DOS keyboard handling to use standard pointer addresses instead of

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an index into a private array.
Submitted by:	Randall Hopper <rhh@ct.picker.com>
This commit is contained in:
Jonathan Lemon 1998-01-21 21:37:02 +00:00
parent 9d8d61fb4d
commit 462232c223
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=32686
1 changed files with 19 additions and 11 deletions
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30
usr.bin/doscmd/tty.c
View file

@ -29,7 +29,7 @@
*
* BSDI tty.c,v 2.4 1996/04/08 22:03:27 prb Exp
*
* $Id: tty.c,v 1.1 1997/08/09 01:43:03 dyson Exp $
* $Id: tty.c,v 1.2 1997/08/16 00:16:48 jlemon Exp $
*/
#ifndef NO_X
@ -167,6 +167,7 @@ u_short read_raw_kbd(int fd, u_short *code);
#define K_BUFENDP *(u_short *)0x482
#define K_BUFSTART ((u_short *)(0x400 + *(u_short *)0x480))
#define K_BUFEND ((u_short *)(0x400 + *(u_short *)0x482))
#define K_BUF(i) *((u_short *)((u_char *)0x400 + (i)))
#define K1_STATUS BIOSDATA[0x17]
#define K1_RSHIFT 0x01
@ -1579,7 +1580,7 @@ tty_report(int *r, int *c)
void
tty_flush()
{
K_NEXT = K_FREE = 0;
K_NEXT = K_FREE = K_BUFSTARTP;
}
void
@ -1911,37 +1912,44 @@ KbdEmpty()
void
KbdWrite(u_short code)
{
int klen = K_BUFEND - K_BUFSTART;
int kf = (K_FREE + 1) % klen;
int kf;
kf = K_FREE + 2;
if (kf == K_BUFENDP)
kf = K_BUFSTARTP;
if (kf == K_NEXT) {
#ifndef NO_X
XBell(dpy, 0);
#endif
return;
}
K_BUFSTART[K_FREE] = code;
K_BUF(K_FREE) = code;
K_FREE = kf;
}
void
KbdRepl(u_short code)
{
K_BUFSTART[K_NEXT] = code;
K_BUF(K_NEXT) = code;
}
u_short
KbdRead()
{
int klen = K_BUFEND - K_BUFSTART;
int kf = K_NEXT;
K_NEXT = (K_NEXT + 1) % klen;
return(K_BUFSTART[kf]);
K_NEXT = K_NEXT + 2;
if (K_NEXT == K_BUFENDP)
K_NEXT = K_BUFSTARTP;
return(K_BUF(kf));
}
u_short
KbdPeek()
{
return(K_BUFSTART[K_NEXT]);
return(K_BUF(K_NEXT));
}
void int10(REGISTERS);
@ -1984,7 +1992,7 @@ video_init()
K_BUFSTARTP = 0x1e; /* Start of keyboard buffer */
K_BUFENDP = 0x3e; /* End of keyboard buffer */
K_NEXT = K_FREE = 0x00;
K_NEXT = K_FREE = K_BUFSTARTP;
vec = insert_hardint_trampoline();
ivec[0x09] = vec;