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authormalc <malc@c046a42c-6fe2-441c-8c8c-71466251a162>2008-09-28 02:43:18 +0000
committermalc <malc@c046a42c-6fe2-441c-8c8c-71466251a162>2008-09-28 02:43:18 +0000
commitf87fc09b15bb73874b812ab82e96105ef6c7a2ba (patch)
treebfe3b0c544b445762614e89760073bd62602d502 /hw/vga.c
parent2d6f89714186bc51d20d34641bf4ab5a726ab54a (diff)
Fix dots per clock value, cleanup and "optimize"
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5338 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw/vga.c')
-rw-r--r--hw/vga.c19
1 files changed, 9 insertions, 10 deletions
diff --git a/hw/vga.c b/hw/vga.c
index 366da11bee..19a9b4ac12 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -192,7 +192,7 @@ static void vga_precise_update_retrace_info(VGAState *s)
clocking_mode = (s->sr[0x01] >> 3) & 1;
clock_sel = (s->msr >> 2) & 3;
- dots = (s->msr & 1) ? 9 : 8;
+ dots = (s->msr & 1) ? 8 : 9;
chars_per_sec = hz[clock_sel] / dots;
@@ -213,12 +213,10 @@ static void vga_precise_update_retrace_info(VGAState *s)
r->hend = r->hstart + hretr_end_char + 1;
r->htotal = htotal_chars;
+#if 0
printf("hz=%f\n",
- (double) ticks_per_sec / (r->ticks_per_char * r->total_chars));
-#if 0 /* def DEBUG_RETRACE */
- printf("hz=%f\n",
- (double) ticks_per_sec / (r->ticks_per_char * r->total_chars));
printf (
+ "hz=%f\n"
"htotal = %d\n"
"hretr_start = %d\n"
"hretr_skew = %d\n"
@@ -232,6 +230,7 @@ static void vga_precise_update_retrace_info(VGAState *s)
"dots = %d\n"
"ticks/char = %lld\n"
"\n",
+ (double) ticks_per_sec / (r->ticks_per_char * r->total_chars),
htotal_chars,
hretr_start_char,
hretr_skew_chars,
@@ -265,11 +264,11 @@ static uint8_t vga_precise_retrace(VGAState *s)
if (cur_line >= r->vstart && cur_line <= r->vend) {
val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
- }
-
- cur_line_char = cur_char % r->htotal;
- if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
- val |= ST01_DISP_ENABLE;
+ } else {
+ cur_line_char = cur_char % r->htotal;
+ if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
+ val |= ST01_DISP_ENABLE;
+ }
}
return val;