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Author Topic: Jumping (bootleg Rainbow Islands)  (Read 2319 times)
tim
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« on: November 20, 2005, 04:58:41 PM »

Symptom
No boot - screen full of static garbage.

Tests
Tested clock at pin 15 of 68000. Got 8 MHz. Good. Tested Halt and Reset on pins 17 and 18. Both held high.
Shorted ground (pin 16) to pin 17. Game booted.

Fix
Looked around and found a cap bent with the - leg broken. Soldered it back down. Game now boots.

Symptom
Up, down, left, right and buttons A or B don't do anything. Coins and starts work.

Tests
Probed inputs to 74245. Inputs getting there fine. Can't tell if output from 245 is good without more
equipment.

To do
Either just try replacing it or drag out the logic comparator and go to town with another 74245.
Logged
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