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dbuchwald / 6502

DB6502: 65C02 based computer inspired by BE6502
MIT License
145 stars 30 forks source link

Where to go for help? #55

Open stevegg opened 2 years ago

stevegg commented 2 years ago

I'm having some issues but not sure where the best place to get help is.

I have the PCB and have mounted everything but the 6551 (in transit someplace between here and China). No matter what I try I can't get the VIA (#1) to output anything. All of the lines in seem to be set properly but there's nothing on V1PB0-7. This means that neither the blink sketch nor any of the others (LCD etc..) work. I have the mega debugger setup and I can step through the program and see that it's writing to the via (8800) but nada. I have checked/re-checked/checked again to make sure there are no cold solders or bridges. Checked voltages, used a logic probe to make sure that the various input lines are set. I can see Chip Select working etc...etc...

I realize this isn't the right place for help with the board so if someone could either point me in the right direction or give me some pointers it would be extremely helpful.

stevegg commented 2 years ago

As an aside, I built 2 of these and both have the same issue. I'd pull hair out...but I only have so much to spare :)