Create a new IDE hard drive image (2GB to 10GB is recommended for XP).

Emulating hardware requires significant computing power. To achieve a smooth 100% emulation speed on a high-end Windows XP configuration, your host machine should meet the following specifications:

Acquire a PCem ROM collection (freely available on archive and community sites) and extract the contents into the roms folder of your PCem directory. PCem will not boot without these hardware BIOS files. 2. Creating the Virtual Machine

Emulating Windows XP on PCem: The Ultimate Guide to Accurate Retro Hardware Simulation

Save BIOS changes and exit. The blue Windows XP setup screen will initialize.

PCem requires original motherboard and video card BIOS ROMs to function. Due to copyright laws, these are not bundled with the emulator. You must source a complete "PCem ROMs" package online and extract these files directly into the roms/ directory inside your PCem folder. Step 2: Creating the Virtual Machine Configuration

PCem supports full-screen mode and various display scaling options. For mouse input, recent versions of 86Box (the PCem fork) have introduced smoother mouse handling, which may be worth considering if input latency is problematic in PCem.

Most people first try to run Windows XP in a Virtual Machine (VM) like Oracle VirtualBox

8 GB minimum (PCem itself uses very little, but the host needs overhead).

Once the installation finishes, Windows XP will reboot and load the desktop. Phase 4: Optimizing for Performance

Because PCem forces high usage on one CPU core, ensure your host laptop/PC has good cooling, or it will throttle, resulting in terribly slow emulation.

In the configuration, add a new hard drive. An IDE drive with 10–20 GB is plenty for a retro build.

: Older games that tie their physics engine or game speed to CPU clock rates will run exactly as they did in 2001.

Once you reach the Windows XP desktop, you will need to install specific hardware drivers to enable smooth performance and full 3D graphics acceleration. Video Drivers