Installing Windows 95 on Qemu

First of all Windows 95 will run on Qemu.. Yes even the hokey Windows 95a. However the PCI support from the first version of Windows 95 is.. not all that good. Prepare for hell.

Windows 95 Japanese running on Qemu

Requirements

I've found that you really need four key things for a good Qemu Windows 95 system:

• Intel PCI drivers for 95
• VBEMP video driver for 95
• 8029 NIC driver for 95
• mkisofs for building an install CD with tools..

Optional would be Internet Explorer 5.5sp2.. which is the last version to run on Windows 95.

Rough guide ISA

The first thing I did was to grab a bootdisk & make sure I could fdisk/format the hard disk & mount a CD-ROM.. Now if you don't have a good bootdisk for MS-DOS or an MS-DOS intall set, I'd recommend bootdisk.com

I'm using a real CD-ROM with Windows 95.. It's the 'upgrade' version so there is a little hackery to get around installing Windows 3.1..

The first thing you'll need to do is create a virtual hard disk. Because Windows 95 is a fat16 OS you can only have 2GB max partitions.. So I just create a 2gb disk.. I think the 'minimum' you would want would be 200MB..

qemu-img create -f qcow win95.disk 2G

Anyways for the first boot on Qemu 0.10.5 it looks like this:

qemu -L . -hda win95.disk -m 32 -M isapc -cdrom \\.\d: -fda bootfloppy.vfd -boot a

This will create & run a Windows 95 ISA machine, mount the physical CD-ROM and boot from the 'floppy'. From here you'll want to fdisk & format the hard drive.. It's not that hard with MS-DOS 6.22 as it'll want to just do it (keep hitting 1!)..

From the it will want to reboot, and you can format the hard disk....

format c: /s/u/v:hard_disk/q

Now with the disk formatted, I'm going to 'assume' your boot disk can read the CD-ROM.. I prep a fake windows 3.1 directory, and then copy the install files to the hard disk...

c:
cd \
md install
cd install
md win95
cd win95
copy d:\win95\*.* .
cd \
md win
cd win
dir > win.com
md system
cd system
dir > win386.exe

Ok, now from here I'd close Qemu, and start it up like this:

qemu -L . -hda win95.disk -m 32 -M isapc -soundhw sb16 -vga std

This forces the virtual machine to have a Soundblaster 16 & standard VGA. The cirrus drivers in Windows 95a will *NOT* work with Qemu... Also we are still going to install this as an ISA computer. Once MS-DOS has done it's quick boot (no config.sys/autoexec.bat) we go ahead and run windows setup.

cd install\win95
setup

From here the setup program will start to copy files, and then prompt you that it wants to check for a previous windows install.. It'll find the 'stub' windows and then prompt for a new install in the C:\windows direcotory. So far so good. From here I usually modify the hardware myself, unselect all network cards, scsi cards, remove the video except for the standard VGA adapter, remove all audio cards, and select only the soundblaster, and let it do it's thing.

Then it will reboot the VM a few times, ask about printers, and whatnot.. Then you will have a running Windows 95 machine on ISA hardware. From here I'd recommend you shut down the VM, and backup the disk image.. This way you have something to fallback on that will boot, because from here the PCI 'upgrade' gets trickey.

PCI phase

This phase is trickey as you have to do a lot of foot work, but I find the PCI stuff works better then ISA... And I like SVGA not 16 colors..

Creating an update CDROM

In a directory with the NIC driver, PCI drivers & Internet explorer you'll need to run mkisofs. It's somewhat simple just use something like this:

..\mkisofs.exe -o ..\update.iso -J -r -v -V 95up_disk  .

Starting the updates =

Ok with your disk image backed up, it's time to start the PCI fun. We now run Qemu like this:

qemu -L . -hda win95.disk -soundhw sb16 -M pc -m 32 -vga std -cdrom update.iso

On the first boot nothing will have changed, you've got to kick in the hardware detection in the control panel to get Windows 95 to realize you are on a PCI machine now. From here it will go crazy installing device drivers for all kinds of things. And it will want to reboot a few times. I interuppeted it on the 3rd reboot about the fifo IDE stuff... I just hit cancel until the explorer window opened up. Once you can get to explorer it's time to run the Intel PCI updates for Windows 95.