Hi, I got a CBM710 board (nonworking) recently, mainly to "borrow" a 6525 for my Magic Voice cartridge (MV works now :-). I think it is a 710 board, it has 128k RAM and an external keyboard connector. I'd like to get this board working again, but I have some questions that I couldn't answer with the documents on funet, as they only seem to cover the 600 series. Component locations are very different on the 700 series as it seems. So can somebody please confirm the locations and identity of the socketed chips, as I have no idea what the previous owner did. u11 6526a (This one was inserted the wrong way around, but I fixed it early enough. Chip works in a C64) u12 901243-02 u13 901242-02 u17 901244-03 u26 6509R7 u42 TI SN74166 u75 906114-05 (yes, not -04 as mentioned in the 600 service manual) I'd also like to know if the 50/60Hz signal provided on the power supply connector is needed for operation. I think it is only used for the CIA TOD clock, but who knows. Symptoms are a black screen, I get sync pulses on only one line, the other one and video are just doing nothing. The PLA gets quite warm, warmer than the SID. But from what I know from the C64 both temperatures are quite normal. Nicolas - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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