[bogomipz]

Thank you this really helps.

One last question do the individual files. There seems to be 3 distinct file groups:

0b.txt - 8t.txt

l0.txt - l3.txt

r0.txt-r3.txt

Do each of these represent different ROMs or different logical parts of the two ROMs? Or am I reading too much into the naming convention?

By the way - brilliant work. This is really a fascinating read.

[ajenner]

The b and t files are the bottom and top halves of the 9 "chunks" of the decoder above the main microcode ROM. The l* and r* files are the left and right halves of the four horizontal slices of the main ROM. I split them up that way because bitract needs the bits to be regularly spaced in both the horizontal and vertical directions.

Thanks - glad you enjoyed it!