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davidg5678

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  1. I have tried using several different working mice, but the cursor will not move. Clicking and typing still work normally though.
  2. davidg5678

    SCSI2SD - starting over

    Your Mac II should be able to work with partitions that are slightly less than 2GB in size. In order to try reconfiguring everything, I would first recommend reformatting the SD Card completely with Disk Utility. When you set up your card again, you will need to create a partition on it small enough not to confuse your Mac II. If you have a modern Mac or Linux computer, I have had success following this guide: http://www.codesrc.com/mediawiki/index.php/HFSFromScratch. The guide explains how to create a disk image with all of the necessary drivers on your modern computer and then copy it onto your SD card. As you already have a way to boot from floppy disks, you could ignore the sections about copying an emulated image onto the SD card, and just create a blank disk image that you can install OS7 onto later. The 3686496 sectors mentioned as an example roughly translate to a 1.9GB file which would work well with a Mac II. I am happy to try to explain the guide in more detail if you need help.
  3. davidg5678

    SE FDHD Restoration

    Excellent work! Can you elaborate on how you found the non-conductive VIA underneath the SCC chip? On one of my broken SE/30 boards, many vias have the same sunken look and corroded color. Did you probe each VIA with a multimeter to find the broken connection? How were you able to drill through the board without damaging it? Good luck on your SE/30 Resurrection!
  4. I have swapped the UL11 IC with a working part from another board, but the mouse cursor still does not move. Are there other parts involved in the ADB circuit that I could check?
  5. To summarize the brick wall of text I wrote above, I am trying to repair a recapped SE/30 motherboard which has partially functional ADB. I am able to use a keyboard and click the mouse, but I cannot move the mouse cursor. I have tried to troubleshoot this using different mice and ADB ports, but I can't get the cursor to budge. Should I try to swap the UL11 ADB IC as my next troubleshooting step, or should I do something else? The pads for C8, C9, and C10 were all broken, so I ran patch wires from the capacitors to the locations described in the diagram above. I am not sure whether or not I bypassed resistors as referred to in the bottom left corner of the chart. Can anyone verify this? I have confirmed using another motherboard that C1's positive side is connected to Pin 12 of J12 and that its negative side is connected to ground. This is the opposite of the diagram above, so I think it should be a non-issue on the board I'm fixing. If you have any ideas about how to fix this computer, please let me know. Thanks!
  6. davidg5678

    SE FDHD Restoration

    Me three!
  7. I recently purchased a new (to me) broken SE/30 motherboard to replace my overworked board that stopped booting correctly. The board I bought had been recapped; however, upon testing, it made the sad mac boot noise and displayed no video apart from a garbled mess onscreen. To troubleshoot, I scrubbed the entire board with vinegar to remove the little corrosion I saw and then rinsed it off with water. I then scrubbed the board with Isopropyl alcohol to clean it and blasted all of the liquid off with canned air. This solved some of the issues as the computer now booted with a normal chime and displayed a blinking floppy disk, although the video was still quite garbled. I came across the capacitor replacement guide below and decided to double check the work done by the previous recapper (is that a word? ). I found that connections from C1, C8, C9, and C10 were not as they should be. When I probed capacitor C1, I found that the pads on the board are opposite what the diagram says they are. This either indicates an issue with the board or the diagram, but I am unsure which one. I decided to leave it the same for now. For C8, C9, and C10, at least one of the pads on each was either missing or disconnected from its trace. I ran wires from each capacitor to the points listed in the diagram below. --Is this okay for the board or is it bypassing the resistors for each capacitor as stated in the bottom left of the diagram? After all of this, the computer now turns on with a normal boot chime and displays a blinking floppy disk icon. The garbled video signals have disappeared for now, but I am not sure what caused them in the first place. All of the system voltages are normal enough (I measured roughly 4.8v and 11.83v at the floppy connector). The blinking floppy icon is unusual as I have a working SCSI2SD plugged into the motherboard. (Tested on another computer) Nevertheless, when I insert a boot disk, the machine boots normally into my System 6 Installer. My SCSI2SD is not detected once the computer has booted either. Strangest of all, my ADB keyboard works fine (as I tested with some keyboard shortcuts), but no matter which mouse I use, I am unable to move the cursor. I am able to click and open the Apple menu where the cursor is initially located on boot, but it does not move anywhere. There are several pads missing under the UL11 ADB chip, but according to the schematic, all of the pads which actually were used still remained connected. I was able to confirm this with a multi meter. Attached are pictures of both the board and the view underneath the UL11 chip. Please let me know if you have any ideas as to how to fix this computer. Thank you!
  8. davidg5678

    SE/30 Logicboard Video Issues

    While checking the voltages at the floppy port on the SE/30 board, I noticed that I was receiving 1.63 volts instead of 12 volts! This is definitely part of the problem. The 5 volt rail had a steady 4.93 volts. I do not think that this is a power supply issue, because as soon as I checked the same supply with my working Mac SE logic board, the voltages were correct. This machine has a recapped analog board and power supply. The board was washed before and after recapping, but I can still look for broken traces: Can you explain the process you go through when using the schematics? Also -how would I check places on the bottom of the board with the top? Thanks!
  9. davidg5678

    SE/30 Logicboard Video Issues

    IMG_20190619_101206.tiff IMG_20190621_121836.tiff MVIMG_20190619_200624.tiff MVIMG_20190621_121929.tiff
  10. davidg5678

    SE/30 Logicboard Video Issues

    I have finished repairing the damaged components near the video circuit of this logic board and ran some wires in that area to replace broken traces; however, the machine still refuses to boot. @dochilli may be on to something as there is no longer a boot chime when I turn the machine on. Curiously, the boot screen looks the same regardless of whether the ROM SIMM is installed or not. I cannot see any damaged traces in the area near the ROM, but I think it is part of the problem. Attached are some pictures of the logic board in its current state along with what the boot screens look like. (With and without the ROM installed, respectively)
  11. These look like some great resources! I just bought a copy of the Macintosh C Programming Primer for all of $2. @Mu0n: it sounds like I might want to learn the basics of this on original hardware, and then if I start a large project, I would want to use Retro68 to make my life easier. Let me know when your website is up and running! Retro68 says that it is compatible with MacOS, Windows, and Linux.
  12. @Mu0n Now that you are able to program for System 6, is there a place you would recommend starting for someone who can program in modern languages? Were there books that you remember being helpful? Would it better at this point to learn how to use Retro68? Thanks!
  13. Does your PSU make a very quiet clicking noise when plugged into the wall? My Quicksilver's broken PSU does this while pulsing very small amounts of voltage (off then on) through the power rails. I attempted to take apart my PSU, but I had trouble locating what was clicking. This was as far as I got as I did not want to check things with my multimeter while it was plugged into the wall. In theory, it is possible to perform the ATX-to-G4 mod and use a Boost Converter to provide the higher voltage used for ADC power. https://www.amazon.com/3V-32V-5V-48V-Output-Adjustable-Converter/dp/B01MS3IAVL/ref=asc_df_B01MS3IAVL/?tag=hyprod-20&linkCode=df0&hvadid=343288438787&hvpos=1o3&hvnetw=g&hvrand=1861675565975819191&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9006604&hvtargid=pla-737249670421&psc=1&tag=&ref=&adgrpid=68271436279&hvpone=&hvptwo=&hvadid=343288438787&hvpos=1o3&hvnetw=g&hvrand=1861675565975819191&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9006604&hvtargid=pla-737249670421
  14. davidg5678

    Connecting Powermac G4 to Raspberry NAS?

    What operating system is your Powermac G4 running?
  15. Do you have links to where you bought these? The prices of SSDs keep falling -$22 is much more reasonable than $200! Thanks!
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