Spacewar Gngngngnnnn!!!
Robert Best
bob at turnkey.TCC.COM
Tue Jun 21 08:53:38 AEST 1988
Spacewar patch for Xenix 386 (286?)
from Bob Best (bob at dhw68k.cts.com)
The following patches can be used as input to Larry Wall's patch program
to revise the following files:
update.c
cmd.c
play.c
All patches involve manipulation of alarm(2) system calls that were causing
spacewar to fail during execution. Since these patches are timing related,
no guaranty can be made regarding their success on varying systems. These
patches have only been tested on Xenix 386 2.2.2.
To generate the patches, enter 'patch <patchfile' at shell prompt, where
this file is 'patchfile'. This must be done from directory containing source.
Next, run 'make', install binaries in directory specified in spacewar.h and
then, hopefully, type 'psw.sh' and TAKE OFF!
*** /usr/tmp/sw/org/update.c
--- update.c
**************
*** 4,10
* Copyright 1985 obo Systems, Inc.
* Copyright 1985 Dan Rosenblatt
*/
-
#include "spacewar.h"
#ifndef VMS
#include <sys/types.h>
--- 4,9 -----
* Copyright 1985 obo Systems, Inc.
* Copyright 1985 Dan Rosenblatt
*/
#include "spacewar.h"
#ifndef VMS
#include <sys/types.h>
**************
*** 30,35
char *s,*lckmsg();
extern int numpling;
#ifdef DEBUG
DBG("update()\n");
#endif
--- 29,35 -----
char *s,*lckmsg();
extern int numpling;
+ alarm(0);/*RSB - alarm off during update*/
#ifdef DEBUG
DBG("update()\n");
#endif
**************
*** 60,65
}
}
/* movement of objects */
updobjs();
updmov();
--- 60,66 -----
}
}
+ if (gametime%10L == 0) { /*RSB - do update on every 10th call*/
/* movement of objects */
updobjs();
updmov();
**************
*** 76,82
/* direction, sensors, homing */
upddsh();
!
/* player's screens */
for (plogin=loginlst;plogin < loginlst+MAXLOGIN;++plogin) {
if (!plogin->ln_tty || !(puniv=plogin->ln_play.ip_ptr)) continue;
--- 77,83 -----
/* direction, sensors, homing */
upddsh();
! }
/* player's screens */
for (plogin=loginlst;plogin < loginlst+MAXLOGIN;++plogin) {
if (!plogin->ln_tty || !(puniv=plogin->ln_play.ip_ptr)) continue;
**************
*** 85,91
output(plogin,0,0,0);
pcrft->cr_time += 1;
}
-
#ifdef DEBUG
VDBG("update return\n");
#endif
--- 86,91 -----
output(plogin,0,0,0);
pcrft->cr_time += 1;
}
#ifdef DEBUG
VDBG("update return\n");
#endif
**************
*** 89,92
#ifdef DEBUG
VDBG("update return\n");
#endif
}
--- 89,93 -----
#ifdef DEBUG
VDBG("update return\n");
#endif
+ alarm(1);/*RSB - alarm on*/
}
*** /usr/tmp/sw/org/cmd.c
--- cmd.c
**************
*** 357,363
struct uio2 inp2;
#endif /* VMS */
#endif /* BSD */
-
#ifdef DEBUG
DBG("getinp()\n");
#endif /* DEBUG */
--- 357,362 -----
struct uio2 inp2;
#endif /* VMS */
#endif /* BSD */
#ifdef DEBUG
DBG("getinp()\n");
#endif /* DEBUG */
**************
*** 372,377
#ifdef DEBUG
VDBG("getinp return\n");
#endif
return(NULL);
}
doproctrap = 1;
--- 371,377 -----
#ifdef DEBUG
VDBG("getinp return\n");
#endif
+ alarm(1);/*RSB*/
return(NULL);
}
doproctrap = 1;
**************
*** 394,399
continue;
}
#endif /* VMS BSD SYSIII SYSV */
doproctrap = 0;
#ifdef DEBUG
#ifndef BSD
--- 394,400 -----
continue;
}
#endif /* VMS BSD SYSIII SYSV */
+ alarm(0);/*RSB*/
doproctrap = 0;
#ifdef DEBUG
#ifndef BSD
**************
*** 457,462
#ifdef DEBUG
VDBG("getinp return\n");
#endif /* DEBUG */
return(inp.uio_lgn);
case '\025': /* control-U */
--- 458,464 -----
#ifdef DEBUG
VDBG("getinp return\n");
#endif /* DEBUG */
+ alarm(1);/*RSB*/
return(inp.uio_lgn);
case '\025': /* control-U */
**************
*** 495,500
#ifdef DEBUG
VDBG("getinp return\n");
#endif /* DEBUG */
return(inp.uio_lgn);
}
--- 497,503 -----
#ifdef DEBUG
VDBG("getinp return\n");
#endif /* DEBUG */
+ alarm(1);/*RSB*/
return(inp.uio_lgn);
}
*** /usr/tmp/sw/org/play.c
--- play.c
**************
*** 58,63
char ucargs[9][20+1],inuc=0;
dsplcmnt tmpdspl;
#ifdef DEBUG
DBG("play(#%d/%s)\n",plogin-loginlst,plogin->ln_name);
#endif
--- 58,64 -----
char ucargs[9][20+1],inuc=0;
dsplcmnt tmpdspl;
+ alarm(0);/*RSB*/
#ifdef DEBUG
DBG("play(#%d/%s)\n",plogin-loginlst,plogin->ln_name);
#endif
**************
*** 65,70
/* if not yet placed into the universe, try doing so */
if (!plogin->ln_play.ip_ptr) {
if (plinit(plogin)) {
pcrft = plogin->ln_play.ip_ptr->uv_ptr.uv_crft;
sprintf(plogin->ln_input,"Wlcm abrd the %s captain %s",
plogin->ln_crft,plogin->ln_name);
--- 66,72 -----
/* if not yet placed into the universe, try doing so */
if (!plogin->ln_play.ip_ptr) {
if (plinit(plogin)) {
+ alarm(0);/*RSB*/
pcrft = plogin->ln_play.ip_ptr->uv_ptr.uv_crft;
sprintf(plogin->ln_input,"Wlcm abrd the %s captain %s",
plogin->ln_crft,plogin->ln_name);
**************
*** 74,79
#ifdef DEBUG
VDBG("play return\n");
#endif
return;
}
pcrft = plogin->ln_play.ip_ptr->uv_ptr.uv_crft;
--- 76,82 -----
#ifdef DEBUG
VDBG("play return\n");
#endif
+ alarm(1);/*RSB*/
return;
}
pcrft = plogin->ln_play.ip_ptr->uv_ptr.uv_crft;
**************
*** 527,532
output(plogin,'E',0,0);
output(plogin,'C',0,PROMPT);
output(plogin,0,0,0);
return;
}
sprintf(buf,"%.14s - not docked and BAD != 0",plogin->ln_input);
--- 530,536 -----
output(plogin,'E',0,0);
output(plogin,'C',0,PROMPT);
output(plogin,0,0,0);
+ alarm(1);/*RSB*/
return;
}
sprintf(buf,"%.14s - not docked and BAD != 0",plogin->ln_input);
**************
*** 1149,1154
#ifdef DEBUG
VDBG("play return\n");
#endif
return;
}
--- 1153,1159 -----
#ifdef DEBUG
VDBG("play return\n");
#endif
+ alarm(1);/*RSB*/
return;
}
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