I decided to bring out my two Commodore 8032s. One of them works (after I replaced a RAM chip) and one of them does not. I figured I could use the working one to help diagnose the one that doesn't work. However, I'm hitting a bit of a wall.
Here's what I've got figured out so far... The voltages are all good. Also, the socketed chips are all good as I was able to swap them between the working machine and the bad one. The monitor powers up and works, as I'm able to get the bright dot when I power it on with the connector unplugged. I have good clock signals, both 16MHz and 1 MHz.
Now, if I use my scope on the address lines, it appears that the CPU is trying to send signals on at least some of them while some of them just go high. My guess is it may be one of the ROM chips not functioning. Is there a way to tell which one may be dead?
Here's what I've got figured out so far... The voltages are all good. Also, the socketed chips are all good as I was able to swap them between the working machine and the bad one. The monitor powers up and works, as I'm able to get the bright dot when I power it on with the connector unplugged. I have good clock signals, both 16MHz and 1 MHz.
Now, if I use my scope on the address lines, it appears that the CPU is trying to send signals on at least some of them while some of them just go high. My guess is it may be one of the ROM chips not functioning. Is there a way to tell which one may be dead?