~/talk

A Venix/86 emulator

Talkat FOSDEM 2022 · on Sunday, 2022-02-06· at 16:30· D.emulator

speaker

name:Warner Losh

links:none on file

resources

video:https://video.fosdem.org/2022/D.emulator/venix.mp4

slides:https://docs.google.com/presentation/d/1aAxBk6ODGA28H32cH1GNghGJ4O-fSyam5faNFWVSrdI/edit?usp=sharing

summary

Describes an emulator written to run Venix/86 (the early Unix port for IBM PC and DEC Rainbow 100B) to speed development of a Venix/86 source-recreation project. Covers the emulator’s architecture, its system-call interface, portability to other 8086/8088 Unixes, and techniques used to overcome no-MMU systems; implementation details include decompiling libc to recover syscalls and running the emulator using vm86 on FreeBSD/i386 bhyve (with potential qemu user-* port).

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