Ancient Unix
Ale
Posts: 2,363
As I commented in another thread I am developing a COG with some other features in a FPGA, but for fun I decided to test a sort of ready-to-use pdp-11 core. It works up to 33 MHz, at least my simple test does. A very interesting architecture. But using the simh simulator, you can run unix v5 to v7. You only need the right commands... The V5 Kernel is only 25 kbytes, the v7 is much bigger at 52 kbytes. 
for version 5 (and simh 3.9)
set cpu 11/45
set cpu 256K
set cpu idle
set tto 7b
attach rk unix_v5_rk.dsk
boot rk
[/code]
at the '@' prompt you type unix and press Enter
for version 7
at the '@' prompmt you type boot and press Enter
and at the '.' prompt you type rl(0,0)rl2unix
for version 5 (and simh 3.9)
set cpu 11/45
set cpu 256K
set cpu idle
set tto 7b
attach rk unix_v5_rk.dsk
boot rk
[/code]
at the '@' prompt you type unix and press Enter
for version 7
set cpu 11/45 set cpu 256K set cpu idle set tto 7b attach rl unix_v7_rl.dsk boot rl
at the '@' prompmt you type boot and press Enter
and at the '.' prompt you type rl(0,0)rl2unix