Dossier
Intel 8086
Coverage of Intel 8086 in the Nexus archive.
- Microsoft open-sources "the earliest DOS source code discovered to date"
Microsoft has released the earliest discovered DOS source code, including 86-DOS 1.00 kernel sources and PC-DOS 1.00 development snapshots, along with documentation. The code predates the MS-DOS branding and traces back to Tim Paterson's original 86-DOS (QDOS) created for Intel 8086-based systems, later licensed by Microsoft for the IBM PC.
- 8087 Emulation on 8086 Systems
The article discusses how 8087 math coprocessor instructions can be emulated on 8086-based systems, enabling compatibility with software requiring floating-point operations. It highlights technical methods for replicating 8087 functionality in software, useful for retro computing and legacy system preservation.