retrocomputing and fpg's 18 or other odd size bits

On 4/11/2018 4:16 PM, Torfinn Ingolfsen via cctalk wrote: Does NOT support my FPGA. I am using the FPGA for all the heavy lifting of testing my cpu design so in time it can be used for other things. The real design is a microcode 2901 cpu about 1976 ish, with 256x8 70 ns proms. Modern 22V10's will be used as 'prom' and 'glue' logic, but alas that software and GAL programmer still are windows only. It is a similar feel to the 16 bit computers other than the PDP 11, and same cycle times as core of that era. 1.3 us for operate and 2.6 us memory operations. 18 bits is just about right for a 'small' computer size and operands and front panel. Disk I/O will be fake devices of 9 bit characters on a SD card. Now I need to hit the web for some good programing books from the 1970's era so I finalize the I/O and memory map of the computer and fine tune the instruction set. Ben. Yes I know the FPGA card can run faster,but not with 1976 speeds.