pttak's latest activity

Hi Andy, Where can I get the code for that very cool display on your PET ? Mike

Based on comments from AndyG and Dave I programmed a TMS2532 with the Superpet character ROM contents. With 6809E and new character...

Dave, Yes the 8032 works correctly now with all chips installed on the combo board but when I switch to 6809 mode I have a full screen...

Thanks very much. Good advice. I ordered a couple "E" I have two 6809s here, plain and E. Unfortunately I don't recall which one came...

Hi Dave, I've been taking another crack at fixing the combo board. I had previously removed the 6809 but had never tried removing...

Hi Fred, thanks for response. I'll keep you in mind, but I guess I am not the type to give up so easy so I'll probably give it some...

When I remove the combo board the 8032 works fine. I think I will give up and sell the combo board in non-working condition. Any...

Still no luck getting combo board to work. 8032 without combo works fine. My 8032 is a version 8032080. Looking at 8032080 sheet 1 of...

With the 6809 removed I was able to boot in 6502 mode intermittently. Works sometimes and not others. I have yet to figure out the...

I removed the 6809 and tried to boot up in 6502 mode. Then I scoped all 40 pins. I have results here: https://kl6m.com/c/test1.gif I...

6502 mode: U17 pin8 = +5v U13 pin39 = high U13 pin40 = low 6809 mode U17 pin8 = low U13 pin39 = low U13 pin40 = high

The NoROM line is high with 6502 switch selected. All three 6809 ROM select lines (pin20) U49, U48, U47 are all logic high. When I...

I modified the 8032 board for the 16MHz clock. I put everything back together and checked NoROM and it is high, enabling the 8032 ROMs...

Hi Dave, Fortunately I have the original ROMs in this unit. I previously burned an EPROM to fix the edit ROM but that was for my other...

Hello Hutch, Thank you very much for the quick response. Yes, two boards. Not an original Superpet. The 8032 is version 8032080...