Pentagon 128k debugging

[solegstar]

testing the INT and RAM using Test 4.30 (which also confirms the tact at 171680 cycles).

How many INT cycles? "Too short", "Too long" or..?

One more thing that comes to my mind would be testing a demo that uses covox sound and that would be pretty much all.

If you connect DAC (R-2R or 8bit chip) on "printer port"... only after that you can hear covox sound.