![]() (Huge shoutout to the maintainers of from which the above image was captured. but for future reference, the red marks below show exactly where the breaks were: I'd later go back and do a proper repair on these. Sure enough, I found that DRD_27 and DRD_20 were open somewhere between Bridgette and Paula.Ī couple of (temporary!) bodge wires were duly installed to make the connection. ![]() So, I turn my attention to the data bus, focusing on the bits that go across to Paula (DRD_31 - DRD_24). ![]() That's somewhat good news, in that it tells me that the CPU is at least alive enough to be sending something across to the custom chip Paula to spit out the serial port. But when I tried a "Ctrl + A + A" keyboard reset, I'd get a bunch of uninteligable garbled characters out of the serial port: I wasn't seeing anything when I powered on. With the A4000 Serial port connected with a jury-rigged null modem cable. nothing on screen, but could I see anything on the serial port? (DiagROM talks on the serial port as well as trying to display to the screen.) So it was out with Kickstart, in with DiagROM and power on. Certainly nothing glaringly obviously broken. Other than the PCB trace damage and pad damage to U977 around the battery with attempted bodge wire fixes, it wasn't looking *too* bad.
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