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diff -urp bochs-2.2.6/iodev/pit82c54.cc bochs-2.2.6.orig/iodev/pit82c54.cc
--- bochs-2.2.6.orig/iodev/pit82c54.cc 2006-01-08 12:39:08.000000000 -0800
+++ bochs-2.2.6/iodev/pit82c54.cc 2006-04-03 14:00:27.000000000 -0700
@@ -28,6 +28,7 @@
#include "iodev.h"
#include "pit82c54.h"
+#include <stdlib.h>
#define LOG_THIS this->
@@ -359,7 +360,13 @@
case 2:
if(thisctr.count_written) {
if(thisctr.triggerGATE || thisctr.first_pass) {
- set_count(thisctr, thisctr.inlatch);
+ unsigned n = thisctr.inlatch;
+ if (jitter && n > 5) {
+ n *= (double) rand() / RAND_MAX;
+ if (n < 5)
+ n = 5;
+ }
+ set_count(thisctr, n);
thisctr.next_change_time=(thisctr.count_binary-1) & 0xFFFF;
thisctr.null_count=0;
if(thisctr.inlatch==1) {
diff -urp bochs-2.2.6/main.cc bochs-2.2.6.orig/main.cc
--- bochs-2.2.6.orig/main.cc 2006-01-22 04:31:15.000000000 -0800
+++ bochs-2.2.6/main.cc 2006-04-03 14:00:54.000000000 -0700
@@ -105,6 +105,7 @@
#endif
char *bochsrc_filename = NULL;
+int jitter = 0;
void bx_print_header ()
{
@@ -459,6 +460,13 @@
else if (!strcmp ("-q", argv[arg])) {
SIM->get_param_enum(BXP_BOCHS_START)->set (BX_QUICK_START);
}
+ else if (!strcmp ("-j", argv[arg])) {
+ if (++arg >= argc) BX_PANIC(("-j must be followed by a number"));
+ else {
+ jitter = 1;
+ srand (atoi (argv[arg]));
+ }
+ }
else if (!strcmp ("-f", argv[arg])) {
if (++arg >= argc) BX_PANIC(("-f must be followed by a filename"));
else bochsrc_filename = argv[arg];
diff -up /home/blp/cs140/bochs-2.2.6/bochs.h\~ /home/blp/cs140/bochs-2.2.6/bochs.h
--- bochs-2.2.6/bochs.h.orig 2006-01-28 08:16:02.000000000 -0800
+++ bochs-2.2.6/bochs.h 2006-04-03 14:03:54.000000000 -0700
@@ -698,4 +698,6 @@ int bx_init_hardware ();
#endif
+extern int jitter;
+
#endif /* BX_BOCHS_H */
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