docs: adding instructions for Windows 9x

docs/windows-9x.md

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+## Installing using QEMU
+
+Recommended versions:
+ - Windows 95 OSR2(.5)
+ - Windows 98 Second Edition (SE)
+
+-------------
+
+1. Create a disk image (up to 2 GB): 
+```sh
+qemu-img -f raw hdd.img <size in megabytes>M
+```
+2. Run QEMU with the following settings:
+```sh
+qemu-system-i386 -m 128 -M pc,acpi=off -hda hdd.img
+```
+ - add `-cdrom /path/to/installCD.iso`, if you use a CD version.
+ - add `-fda /path/to/boot_floppy.img -boot a`, if you use a floppy version or your install CD is non-bootable.
+ - (optionally) add `-device sb16` to enable sound
+ - (optionally) add `-nic user,model=ne2k_pci` or `-device ne2k_pci,netdev=<...>` to enable networking
+
+3. For Windows 98: select "Start Windows 98 Setup from CD-ROM". For Windows 95: select "Load NEC IDE CDROM driver" and run `fdisk` to create partition, restart emulator, run `format c:` and `D:\WIN95\SETUP`.
+
+4. To change floppy disk, press *Ctrl+Alt+2* to switch to the QEMU Monitor, run `change floppy0 /path/to/new_floppy_image` and press *Ctrl+Alt+1* to switch to VGA.
+5. Follow the installation guide on the screen.
+6. (optionally) If "Windows protection" errors appears on startup, apply [FIX95CPU](http://lonecrusader.x10host.com/fix95cpu.html) or [patcher9x](https://github.com/JHRobotics/patcher9x#installation).
+
+> [!TIP]
+> For transfer files from host to guest, use [genisoimage](https://wiki.debian.org/genisoimage) ([UltraISO](https://www.ultraiso.com/) and [PowerISO](https://www.poweriso.com/) for Windows and Mac) for creating CD-ISO image or [dosfstools](https://github.com/dosfstools/dosfstools) ([WinImage](https://www.winimage.com/download.htm) for Windows) for creating floppy disk images, then mount the created image to QEMU.
+
+## Floppy disk support
+
+Currently, the floppy drive in v86 works only with MS-DOS compatibility mode.
+
+To check this: open the Start menu, click on "Control Panel" and "System", select "Performance" tab. 
+If it says *"Drive A is using MS-DOS compatibility mode file system"*, the floppy drive should work properly in v86. If not, try this solution:
+
+1. Click on "Device Manager" in "System Properties".
+2. Open "Floppy disk controllers", select "Standard Floppy Disk Controller" and press "Remove" at the bottom.
+3. Restart Windows.
+
+## Enabling True Color (32 bpp)
+
+The default VGA display driver only supports 640x480x8 video mode, to fix this, install **Universal VBE9x Video Display Driver**.
+
+> [!WARNING]
+> After installing, DOS Mode (and other programs and games that require it) may not work properly. 
+> This is a problem in VBE9x, not v86, see [#110](https://github.com/copy/v86/issues/110).
+> Also, this driver doesn't support DirectX, DirectDraw and OpenGL.
+
+1. Download driver from https://bearwindows.zcm.com.au/vbe9x.htm and unpack into Windows.
+2. Right-click on the Desktop, click on "Properties".
+3. Click "Advanced" > "Adapter" > "Change".
+4. Press "Next", select "Display a of all the drivers in a specific location..." and press again "Next".
+5. Press "Have Disk...", click "Browse" and go to folder with unpacked driver. Inside the folder with driver, should be folders like `032mb`, `064mb`, `128mb`. Choose a version based on needed video memory size (for example, `032mb`), then select `vbemp.inf` inside.
+6. Select "VBE Miniport" adapter, press "OK" and "Next".
+7. After installing, restart Windows.
+
+## CPU idling on Windows 95
+See about [installing AmnHLT](cpu-idling.md#windows-9x-using-amnhlt).
+
+## Enabling networking on Windows 95 (requires install CD)
+
+1. Open the Start menu, click on "Control Panel" and "Add New Hardware".
+2. Press "Next", select "No" and select next options:
+
+```
+Hardware type: Network adapters
+Manufacturers: Novell
+Models: NE2000 Compatible
+```
+
+3. Press "Next" and restart Windows.
+4. After restarting, right-click on "My computer", select "Propeties".
+5. Open "Device Manager" tab, select "NE2000 Compatible" (in "Network adapters") and press "Properties"
+6. Open "Resources", change values by selecting the properties and click on "Change Setting":
+
+```
+Interrupt Request: 10
+Input/Output Range: 0300 - 031F
+```
+
+7. In "Control Panel", open "Network", click on "Add", choose "Protocol" and select the following options:
+
+```
+Manufacturers: Microsoft
+Network Protocols: TCP/IP
+```
+
+8. (optionally) Set "Primary Network Logon" to `Windows Logon`.
+
+## Enabling sound manually
+
+> [!NOTE]
+> If you don't have an install CD, use the Sound Blaster 16 driver from https://www.claunia.com/qemu/drivers/index.html.
+
+1. Open "Start" menu, click on "Control Panel" and "Add New Hardware".
+2. Press "Next", select "No" and select the following options:
+
+```
+Hardware type: Sound, video and game cotrollers
+Manufacturers: Creative Labs
+Models: Creative Labs Sound Blaster 16 or AWE-32
+```
+
+3. Restart Windows.