What hardware does 6th Edition Unix support?
[Answered by: Warren Toomey wkt@tuhs.org] I’ve only ever seen V6 distributed as disk images, although the manuals describe how to load it from tape. It would be nice if someone recreated the tape records. As distributed, virgin V6 expects an 11/40-style machine: 18-bit addressing with kernel and user modes and EIS, and around 96Kw of memory. You will need a line-frequency clock or a real-time clock (KW11-L). There is support for 11/45-style machines with supervisor mode in sys/conf; split I/D is supported. Floating point is required to run some programs: UNIX only supports the 11/45 FP11-B floating point unit. For machines without this hardware, there is a user subroutine available that will catch illegal instruction traps and interpret floating point operations. (See fptrap(3)). The system as delivered has this code included in all commands that have floating point. This code is never used if the FP hardware is available and therefore does not need to be changed. The penalty is a litt
