haraldwolff/qemu-patch-raspberry4
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Fix dots per clock value, cleanup and "optimize"

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5338 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
malc 2008-09-28 02:43:18 +00:00
parent 2d6f897141
commit f87fc09b15
1 changed files with 9 additions and 10 deletions
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19
hw/vga.c
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@ -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;