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qemu-options.hx: mention retrace= VGA option 

The feature was added in commit cb5a7aa8c3 Sep 2008.
My description is based on "Better VGA retrace emulation (needed
for some DOS games/demos)" from
http://www.boblycat.org/~malc/code/patches/qemu/index.html

Signed-off-by: Matthew Ogilvie <mmogilvi_qemu@miniinfo.net>
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
Matthew Ogilvie 2012-08-23 00:24:41 -06:00 committed by malc
parent 7764ae9671
commit 39dda26062
1 changed files with 7 additions and 1 deletions
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8
qemu-options.hx
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@ -945,7 +945,7 @@ DEF("vga", HAS_ARG, QEMU_OPTION_vga,
"-vga [std|cirrus|vmware|qxl|xenfb|none]\n"
" select video card type\n", QEMU_ARCH_ALL)
STEXI
@item -vga @var{type}
@item -vga @var{type}[,@var{prop}=@var{value}[,...]]
@findex -vga
Select type of VGA card to emulate. Valid values for @var{type} are
@table @option
@ -970,6 +970,12 @@ Recommended choice when using the spice protocol.
@item none
Disable VGA card.
@end table
Valid optional properties are
@table @option
@item retrace=dumb|precise
Select dumb (default) or precise VGA retrace logic, useful for some
DOS games/demos.
@end table
ETEXI
DEF("full-screen", 0, QEMU_OPTION_full_screen,