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Optional "precise" VGA retrace support

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Selected via: -vga <name>,retrace=precise

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5336 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
malc 2008-09-28 00:42:12 +00:00
parent 3893c124e7
commit cb5a7aa8c3
5 changed files with 220 additions and 6 deletions
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17
hw/cirrus_vga.c
View file

@ -2744,8 +2744,7 @@ static uint32_t vga_ioport_read(void *opaque, uint32_t addr)
case 0x3ba:
case 0x3da:
/* just toggle to fool polling */
s->st01 ^= ST01_V_RETRACE | ST01_DISP_ENABLE;
val = s->st01;
val = s->st01 = s->retrace((VGAState *) s);
s->ar_flip_flop = 0;
break;
default:
@ -2808,6 +2807,7 @@ static void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
break;
case 0x3c2:
s->msr = val & ~0x10;
s->update_retrace_info((VGAState *) s);
break;
case 0x3c4:
s->sr_index = val;
@ -2819,6 +2819,7 @@ static void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
#endif
s->sr[s->sr_index] = val & sr_mask[s->sr_index];
if (s->sr_index == 1) s->update_retrace_info((VGAState *) s);
break;
case 0x3c6:
cirrus_write_hidden_dac(s, val);
@ -2886,6 +2887,18 @@ static void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
s->cr[s->cr_index] = val;
break;
}
switch(s->cr_index) {
case 0x00:
case 0x04:
case 0x05:
case 0x06:
case 0x07:
case 0x11:
case 0x17:
s->update_retrace_info((VGAState *) s);
break;
}
break;
case 0x3ba:
case 0x3da: