And I'm
very close to having a 360/65 in VHDL.
Was the microcode derived from the engineering drawings?
Yes, from hand-corrected OCR scans.
To be precise, the ALDs and microcode I'm using are not for a plain 2065,
but for a 7201-02, the variant that was used in the 9020 complex. I'm
making modifications that I hope make it work like a 2065 again.
From memory, the 65 is the bigger brother to the 50
with a wider memory
bus.
And a bigger ALU, so the microcode for floating point operations is very
different I believe.
Camiel