QEMU patches

General information

To apply (except for VGA BIOS, combined and mouse patches):

cd /path/to/cvs/qemu
zcat /path/to/patch/VER_NAME.patch.gz | patch -p0
        

Combined patch

Download

Current version demo-qemu-11-02-2006.zip (224k)

Version that applies to 0.8.0 cleanly demo-qemu-20-12-2005.zip (195k)

Description

Interpreter, VGA BIOS, Retrace, GUS/OPL3, Optic Nerve patches stuffed together.

Interpreter

Download

Current version 21e_iqemu.patch.gz (141k) - 11-02-2006

Previous version 21_iqemu.patch.gz (139k)

Ancient version 20b_iqemu.patch.gz (100k)

Description

"Enhances" QEMU with -interp command line switch (and interp monitor command), which turns QEMU into a turtle

Caveats

Needs some work on endianness front

Cycle counting, segment access/limit checks, x86-only version and trace are disabled by default

Sometimes(?) can not get past Win2k's boot logo screen, progress bar never updates (gradient moves though). Works fine, if interpreter was switched off during boot logo screen and then again on.

Boots (not necessarily installs)

• WfW
• MSDOS 6.22
• Linux RedHat 5.2, QEMUs test image (2.5.74), SuSE 9.1 (PE)
• ReactOS 0.2.2
• NetBSD 1.5, 1.6.2
• OS/2 Warp (Merlin)
• QNX 6.21 (NC)
• Win95 (4.00.950 B)
• Win98 (4.10.2222 A)
• BeOS R5 (PE)
• FreeBSD 4.7, 5.3-RC2 (mini-inst ISO)
• OpenBSD 3.5 (FreeOSZoo)

Audio patch (SB16, ES1370, OPL2, AC97)

Download

Current version 21_aqemu.patch.gz (17k) - 11-02-07

Previous version 20_aqemu.patch.gz (5.4k)

Ancient version 17i_aqemu.patch.gz (2.4k)

Info

In Win98 guest make sure that SB16s 16bit DMA is set to 5

DOS environment string BLASTER=A220 I5 D1 H5 T6

OPL2 emulation via AdPlugs LGPLed version of fmopl.c (Tatsuyuki Satoh)

Drivers

Supply --enable-X as needed, the list is available via
configure --help

Once built you can read what drivers are named and list of fine-tuning options via
qemu -audio-help

Problems

SB16: No support for ADC, (m)uLaw, ADPCM

SB16: XMPlay sounds good but pause/resume behaves strangely

fmopl.c (OPL2) uses FPU internally - therefore Adlib emulation is disabled by default

VM saving/loading is not available for Adlib

Loading VM with active audio results in a noticeable delay before sound starts playing again (SB16 only?)

Sound will continue (looping) after VM has been stopped for some output drivers (SB16 only?)

SB16: At startup Win95 complains about MSSBLST.VXD missing or failing to load, sound works nevertheless

ES1370: Win9x - this from here worked for me (16b_aqemu required). Thanks to Stefan Becker for this post.

ES1370: No UART support

All: No game port support

All: No mixer support (no way to set volume, etc)

Sierras audblst.drv information here

YMF262(aka OPL3) and GF1(aka GUS Classic)

Download

Current version 5b_aog_qemu.patch.gz (35k) - 11-02-2006

Previous version 5_aog_qemu.patch.gz (34k)

Info

OPL3 emulation via MAME's ymf262.c (Jarek Burczynski)

Gravis Ultrasound GF1 emulation via GUSemu32

GUS DOS environment string ULTRASND=240,3,3,7,7

Problems

MAMEs license (mame.txt) is incompatible with QEMU licenses and thus this patch can not be included into the main tree. However, nothing precludes end user from patching the sources manually and using it
(IANAL)

GUSemu32 license (GUSEMU32.LICENSE) is incompatible with QEMU licenses ... read above

VM saving/loading is not implemented

VGA retrace and PIT-mode-3 patch

Download

Current version 5c_rqemu.patch.gz (4.2k) - 11-02-2006

Previous version 4_rqemu.patch.gz (2.5k)

Info

Better VGA retrace emulation (needed for some DOS games/demos)

After applying the patch documentation can be found in Retrace.txt online copy

Standard VGA BIOS patch

Download

Current version 2_vgabios.tgz (42k) - 11-02-2006

Info

This one is adds many non-standard VESA modes

Only available when QEMU emulates standard VGA

Useful to run old DOS games/demos that require modes not available for Cirrus (For instance modes with 32bit depth)

Inside the archive

• A patch for Plex86/Bochs LGPL VGABios (extvbe.patch)
• Prebuilt binary of the bios (VGABIOS-lgpl-latest.bin)
• File containing non-standard modes (modes)
• Script to produce vgabios.bin out of the above two (makevgabios.sh/makevgabios.bat)

Usage

Replace standard vgabios.bin with the obtained one

Invoke QEMU like this: qemu -std-vga ...

Grab-less mouse

Download

Current version 1_mqemu.tgz (30k) - 11-02-2006

Info

Inside the archive and in this post

Capture hack

Download

Current version 2_cqemu.tgz (6.9k) - 27-06-2006

Info

Archive contains short README

this _old_ post

Example

prince.avi (434K)