Dunfield 6809 Portable

Re:Dunfield 6809 Portable by anonymousiam on Friday February 05, 2021 @01:32PM (#26039618)

There were some great tools for that platform. I used a different brand ICE, but also an HP1630D logic analyzer with a processor chip-clip and a built-in disassembler so you could see where your code failed. (Worked great for finding hardware problems too.)

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Re:Dunfield 6809 Portable by jhallenworld on Friday February 05, 2021 @02:56PM (#26040485)

So if all you have is a Tek 465 scope, you can make a poor-man's logic analyzer by connecting an oscillator to the reset pin, and trigger off of this pin on the scope. Then use the delayed sweep knob to scan through the bus, one or two bits at a time.

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Re:Dunfield 6809 Portable by ddingus on Friday February 05, 2021 @03:09PM (#26040610)

This is a cool trick! I plan to try it next chance I have my Tek 4 channel out for a play.

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