(Topic ID: 193108)

EK MPU Issues

By Billc479

4 years ago



Topic Stats

  • 9 posts
  • 4 Pinsiders participating
  • Latest reply 4 years ago by Billc479
  • Topic is favorited by 1 Pinsider

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#6 4 years ago

Flakey 5101 ram can cause that kind of issue. So you could have a problem with your NVRam or it's socket.

#8 4 years ago

Not exactly. A 68B21 is simply at 2 Mhz version of a 6821. I can't remember what changed between the early 20's and the later 21's.

And since the system is only running at around 500-800 KHz, it works fine with either.

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