Pentagon 48 или GRM1 начало INTа

[Shockwav3]

This is how I modified the board:

Which would mean BLANK would still get generated by the diode-resistor OR-Gate

Checking further into the schematic I realized that the CPU has 2 gate delays less in the P128 (clocked by C20 [C25 in the P128 schematics]) than in the P48 (clocked by C20 going through 2 flip-flops becoming !CAS)