Although Prosser was very detailed, I needed a range of other sources of information to make this happen. These included:

• A PDP-8 implemented in Verilog. While I did not use his Verilog code, there are a ton of useful files here including several test programs (see later) and the user manuals for them. There is an older version here that has a slightly different set of auxiliary files. 

• A mac-compatible PDP-8/e simulator program. This also included a binary version of FOCAL-8 that was my ultimate goal.

• simh - a simulation of many processors, including the PDP-8

• A Verilog simulation - this was a much faster way to do development since compilation is essentially instantaneous (and Quartus takes about 20 minutes to compile).

  • Icarus Verilog - a simulator​

  • gtkw - a viewer for the output files

• Other books:

  • Verilog By Example by Blaine C. Readler - a good intro to Verilog​

  • Embedded SoPC Design With NIOSII Processor and Verilog Examples by Pong P Chu

• Websites​

  • Verilog for Finite State Machines. Good simple examples.​

  • Finite State Machines in Verilog. 

  • alt.sys.pdp8. A very helpful user group.​

  • HD6120 datasheet. This is a "PDP-8 on a chip" and had useful details about extended addressing and interrupts.

• People​

  • Martin Bishop of Emeritus Solutions - ​for his helpful PDP-8 and Verilog advice

  • Vince Slyngstad from the alt.sys.pdp8 user group for huge help with IO

  • Rob Doyle from the alt.sys.pdp8 user group for huge help with interrupt handling