(Topic ID: 193187)

Meteor drop targets


By GameVault

2 years ago



Topic Stats

  • 15 posts
  • 5 Pinsiders participating
  • Latest reply 3 months ago by GameVault
  • No one calls this topic a favorite

You

Linked Games

  • Meteor Stern Electronics, 1979

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#4 2 years ago

Agreed this sounds like RAM: On the original MPU-200, the state of the METEOR drops is stored in the 24pin DIP 6810 RAM chip. On game powerup, it should be initialized to zeros, but if there was something wrong it might_ end up non-zero, and the software might_ reflect that state upon starting a ball. It would be a weird failure, one that I've never seen, but possible.

Not sure how the memory on an Altek board is done, but putting in an original MPU might at least tell you if it's the MPU or something else.

#6 2 years ago
Quoted from GameVault:

Tried the original MPU.
Same thing.
It seems to remember the last game target orientation and set that up.
So I will try replacing the 24pin DIP 6810 RAM on the original pcb. Any advice where to buy?
How the same thing is happening on the Alltek is weird.

If a completely different MPU gives the same problem, it really can't be the 6810, so I wouldn't bother sourcing and replacing that chip.

This is a real mystery! I'm stumped.

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