Add our doscmd to the tree. This is a result of work from BSDI, and

a group of dos emulator developers.
Submitted by:	Jonathan Lemon <jlemon@americantv.com>
Obtained from:	BSDI

1 files changed, 50 insertions, 0 deletions

diff --git a/usr.bin/doscmd/timer.c b/usr.bin/doscmd/timer.c
new file mode 100644
index 0000000..afaa69f
--- /dev/null
+++ b/usr.bin/doscmd/timer.c
@@ -0,0 +1,50 @@
+/*
+** No copyright?!
+**
+** $Id: timer.c,v 1.3 1996/09/22 15:42:59 miff Exp $
+*/
+#include "doscmd.h"
+
+static void
+int08(regcontext_t *REGS)
+{
+    softint(0x1c);
+}
+
+static void
+int1c(regcontext_t *REGS)
+{
+}
+
+unsigned char timer;
+
+static u_char
+inb_timer(int port)
+{
+    return (--timer);
+}
+
+void
+timer_init(void)
+{
+    u_long 		vec;
+    struct itimerval	itv;
+
+    vec = insert_hardint_trampoline();
+    ivec[0x08] = vec;
+    register_callback(vec, int08, "int 08");
+    
+    vec = insert_softint_trampoline();
+    ivec[0x1c] = vec;
+    register_callback(vec, int1c, "int 1c");
+
+    define_input_port_handler(0x42, inb_timer);
+    define_input_port_handler(0x40, inb_timer);
+    
+    itv.it_interval.tv_sec = 0;
+    itv.it_interval.tv_usec = 54925; /* 1193182/65536 times per second */
+    itv.it_value.tv_sec = 0;
+    itv.it_value.tv_usec = 54925;	 /* 1193182/65536 times per second */
+    if (! timer_disable)
+        setitimer(ITIMER_REAL, &itv, 0);
+}