Published on: 2025-06-21 12:25:09
CSMWrap CSMWrap is a cool little hack that brings back the good old PC BIOS on those fancy-pants UEFI-only systems. It utilises the CSM (Compatibility Support Module) and VESA VBIOS from SeaBIOS project to emulate a legacy BIOS environment. Current Status Right now, CSMWrap can: Boot FreeDOS, Windows XP, and Windows 7 in QEMU (both q35 and piix4 machines) Run on some real hardware too! (Your mileage may vary) Implementation Details CSMWrap works by: Unlocking the legacy BIOS memory regio
Keywords: 4g bios csmwrap legacy memory
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