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Type: Posts; User: csc316

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  1. Replies
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    Making progress...I think...

    Okay, thanks everyone for the help.

    First, when I said signal generator on my LA, I meant pattern generator. I've used that pin the past to send different signals down each line of a bus to trace...
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    Okay, thank you. I think I've got a few 2114...

    Okay, thank you. I think I've got a few 2114 chips lying around. I'll try to swap them out.

    I do know what a NOP generator is, in theory. Never built/used one though. I do happen to have a...
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    Still looking for help with this, but I've made...

    Still looking for help with this, but I've made some progress.

    A few 74LS244 chips have been replaced, as they had rusted through pins. Replaced two memory chips that weren't showing any signals...
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    My replies don't seem to post. So sorry if this...

    My replies don't seem to post. So sorry if this is a duplicate post.

    Pin 37 shows a decent square wave, shown below. I've got nothing on J7's HSync or VSync lines, whether or not I get the rare...
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    Another tidbit of info, I have no voltage on...

    Another tidbit of info, I have no voltage on supply pin 24 of UD8. Checking traces now...
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    Nothing on 6502 pin 7 (0V), with or without the...

    Nothing on 6502 pin 7 (0V), with or without the chirp.
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    I'm getting 5v constant on pin 3 of J7 (that's...

    I'm getting 5v constant on pin 3 of J7 (that's the Vsync, right?). Same on pin 5 of J7 (Hsync, right?). That's with or without the rare chirp.
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    Also, regulators are pretty cool, even the -5v...

    Also, regulators are pretty cool, even the -5v one without any heat sink. No chips get hot.
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    My multimeter and scope have always agreed...

    My multimeter and scope have always agreed perfectly in the past. But now that you mention it, the three voltage regulators I was using as replacements (one new out of the box) were reading a little...
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    Another dead SuperPET!

    Well, you very helpful folks appear to like a challenge with these things. So here's me begging for help!

    The story so far:

    Purchased a dead SuperPET. It's got a 8032090 revision board and...
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    Built one in high school

    These were sold to schools to be used in electronics courses. I believe they came straight from Radio Shack, because our local Radio Shack staff was involved in getting them for the school (cheap or...
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