modessitt
Volunteer: Encyclopedia Submission Moderator
I'm bench testing a -03 MC board. +5.10 at the chips. At first it was dead, but swapping in a good 6502 got it to come up, but it constantly resets when it goes to the attract mode after the title screen. Pokey has been verified as good, and all chips pulled, cleaned, and reseated. Disabling watchdog doesn't help either.
Put it into test mode, and I get BAD ROM 1,2,3.
Okay, so the manual says that means that the 1st, 2nd, and 3rd block of 2k memory are failing. However, it doesn't tell me how to identify which chip is 1st, 2nd, and 3rd. Looking at MAWS doesn't help, either, because it only lists 6 ROMs, while this board has 11.
My next step is to replace the sockets for those chips to see if that helps. If not, then I'll get 3 new chips. But I need to know which chips are 1, 2, and 3.
Any help?
Put it into test mode, and I get BAD ROM 1,2,3.
Okay, so the manual says that means that the 1st, 2nd, and 3rd block of 2k memory are failing. However, it doesn't tell me how to identify which chip is 1st, 2nd, and 3rd. Looking at MAWS doesn't help, either, because it only lists 6 ROMs, while this board has 11.
My next step is to replace the sockets for those chips to see if that helps. If not, then I'll get 3 new chips. But I need to know which chips are 1, 2, and 3.
Any help?
