Move update of BIOS variable at 0x6c (time counter) completely to timer.c.

Suggested by:	Igor Serikov <bt@turtle.pangeatech.com>

1 files changed, 16 insertions, 10 deletions

diff --git a/usr.bin/doscmd/timer.c b/usr.bin/doscmd/timer.c
index a91c8d1..7f40725 100644
--- a/usr.bin/doscmd/timer.c
+++ b/usr.bin/doscmd/timer.c
@@ -8,16 +8,11 @@
 static void
 int08(regcontext_t *REGS)
 {
-    struct timeval tv;
-    time_t tv_sec;
-    struct timezone tz;
-    struct tm tm;
-
-    gettimeofday(&tv, &tz);
-    tv_sec = tv.tv_sec;
-    tm = *localtime(&tv_sec);
-    *(u_long *)&BIOSDATA[0x6c] =
-        (((tm.tm_hour * 60 + tm.tm_min) * 60) + tm.tm_sec) * 182 / 10;
+    *(u_long *)&BIOSDATA[0x6c] += 1;    /* ticks since midnight */
+    while (*(u_long *)&BIOSDATA[0x6c] >= 24*60*6*182) {
+	*(u_long *)&BIOSDATA[0x6c] -= 24*60*6*182;
+	BIOSDATA[0x70]++;               /* # times past mn */
+    }
 
     softint(0x1c);
 }
@@ -40,6 +35,10 @@ timer_init(void)
 {
     u_long 		vec;
     struct itimerval	itv;
+    struct timeval	tv;
+    time_t		tv_sec;
+    struct timezone	tz;
+    struct tm		tm;
 
     vec = insert_hardint_trampoline();
     ivec[0x08] = vec;
@@ -52,6 +51,13 @@ timer_init(void)
     define_input_port_handler(0x42, inb_timer);
     define_input_port_handler(0x40, inb_timer);
     
+    /* Initialize time counter BIOS variable. */
+    gettimeofday(&tv, &tz);
+    tv_sec = tv.tv_sec;
+    tm = *localtime(&tv_sec);
+    *(u_long *)&BIOSDATA[0x6c] =
+        (((tm.tm_hour * 60 + tm.tm_min) * 60) + tm.tm_sec) * 182 / 10;
+
     itv.it_interval.tv_sec = 0;
     itv.it_interval.tv_usec = 54925; /* 1193182/65536 times per second */
     itv.it_value.tv_sec = 0;