I got side tracked for a bit. I have a 16 bit alu wired up. Its not the most photogentic project. To simplify working I made a stack of PCB board with AM2901 chips. The common signals travel vertically via stacking headers. This still needs fully tested.
I am still hung up on how I will setup the Microcode seqencer. I have in my possession all three options for AM2909, AM2910 and AM2910 chips. The current issue I am running into is the microcode map (ROM) for using 8 bit instruction requires memmory with 8 address lines and 12 data lines.
In other news I found a write up via Dangerous Prototype, Ken Shirriff did a post on the internal silicon of the AM2901. Found here: http://www.righto.com/2020/04/inside-am2901-amds-1970s-bit-slice.html