68kMLA Classic Interface
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| SE/30 reloaded board hang at boot | |
| Posted by: codevonlux on 2024-05-04 18:05:51 Hello everyone. I was lucky to get 2 Bolle SE/30 reloaded PCB with back side populated from the Trading post from here. I can finally start to build a new board from a battery bombed donor board. I managed to get most of the BOM new, only a few things like GLU, PLDs, ADB chips which are still in good shape. I started with sockets on all chips so I could possibly qualify some of the alternative used chips from UTsource. I know socket could be the source of trouble especially with recovered chips but I would like to try my luck. I spend like half a day to solder everything on the new board, and ready to power it up. With a original ROM SIMM. I hear a good bong and a grey screen, but it never continue to make the corners "round" and show up the mouse cursor. I tried to replace a few chips with alternatives with no change of symptom. Rominator II gives the same thing. I guess the ROM is waiting for something indifinitely? I tried to remove chips to narrow it down, I removed SCSI, ADB, RTC but still the same. If I remove SWIM or Video ROM then I will not get a bang but only strips. (typical pattern with TI VRAMs). Any idea on how to further debug the issue? I still have one empty reloaded PCB and enough component to try my luck without PLCC sockets but don't have enough confidences on those used BOMs I got from UTsource and other places. I posted photo of my board here: View attachment reloaded_top.jpegView attachment reloaded_buttom.jpeg | |
| Posted by: codevonlux on 2024-05-11 22:42:32 Problem solved with a new ADB replacement:  | |
| Posted by: obsolete on 2024-05-12 08:56:56 Nice work! I have some of those sitting around, still need to program them. | |
| Posted by: JackRubin on 2024-06-09 19:02:27 Congratulations! Glad to hear from someone who had a good experience with sockets. What led you to identifying the ADB as the problem and where did you get the PIC replacement? | |
| Posted by: codevonlux on 2024-06-09 20:28:36 PIC16F87 replacement ADB on this board: mentioned here: https://68kmla.org/bb/index.php?threads/mac-se-adb-controller.38363 , with a QFN-to-PLCC adapter PCB by max1zzz). PCB from max1zzz is here: https://github.com/max234252/PLCC-ADB-Adapter The link to the precompiled binary is also in the github readme. It was reconstructed by Tashtari in this thread: https://68kmla.org/bb/index.php?threads/mac-se-adb-controller.38363 | |
| Posted by: JackRubin on 2024-06-09 21:16:48 Thanks! | |
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