On Jul 19, 2017 10:43 AM, "Douglas Taylor via cctalk" <cctalk@classiccmp.org> wrote:
The pdp11_fp.c code is quite intricate. If simh was a simple simulation it would take the easy route and use the intel fp co-processor as you point out, but it doesn't. It actually 'emulates' what the pdp11 would do in hardware. Do all PDP-11 FPP hardware (and/or microcode) implementations give the same results in all cases? Does FIS?