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Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 3e8085d463..0682338e9f 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -975,6 +975,25 @@ Valid optional properties are @item retrace=dumb|precise Select dumb (default) or precise VGA retrace logic, useful for some DOS games/demos. +@item cga_hacks=@var{hack1}[+@var{hack2},[...]] +Enable various extra CGA compatibility hacks for programs that are +trying to directly set CGA modes without BIOS assistance nor +real knowledge of EGA/VGA. These might only work with -vga std. +Valid hacks are +@table @option +@item palette_blanking +Wait to blank the screen until palette registers seem to actually be +modified, instead of blanking it as soon as the palette address bit (0x10) +of the attribute address register (0x3c0) is cleared. +@item font_height +Ignore attempts to change the VGA font height (index 9), +cursor start (index 10), and cursor end (index 11) of the CRTC control +registers (0x3d5) if trying to set them to the default for CGA fonts +instead of VGA fonts. +@item all +Enable all CGA hacks. More CGA hacks may be added in future versions +of qemu. +@end table @end table ETEXI |