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  1. David Cook

    Apple Macintosh II High Resolution Video Card Memory Upgrade and Recap

    No drivers needed, but it supports only a couple of resolutions. Do you have it hooked to an Apple 13" display or an LCD with a monitor adapter set to 640x480? If not, that may be the problem.
  2. David Cook

    Radius Color Pivot LC PDS Video Card

    I believe you're on the right track by using an adapter. I definitely had to play around with my adapter to find a compatible setting.
  3. David Cook

    Radius Color Pivot LC PDS Video Card

    I assume you have a video adapter connected on the output port? It should have DIP or rotary switch settings to choose the resolution.
  4. David Cook

    Before ResEdit: Alert/Dialog, Font, and Icon Editors (1984)

    2/85 MacStuff 2 and MacStuff 5 (along with all the others) are posted here: https://68kmla.org/bb/index.php?threads/macintosh-lisa-and-iigs-dealer-and-developer-floppy-disk-trove.46038/post-512884
  5. David Cook

    LCIII Recap - Apple design fault -47uF reversed!

    Yup. There is a popular YouTube recapper that I like very much, but unfortunately still believes Apple didn't make a mistake. That would be fine, except he often recaps with tantalums. That's a fire hazard. That's very common with reversed tantalums on 5V rails so long as the power supply can...
  6. David Cook

    Software detection of emulator

    I agree. It is definitive, compatible, and fitting. I'm not sure how an emulated 128/512/Plus could indicate 'added hardware'. But, I imagine there is a way. In my complete code, I first check the slot manager for Basilisk. If nothing, I then call the floppy routine.
  7. David Cook

    Software detection of emulator

    Thank you @Nixontheknight @rplacd and @cheesestraws This code works at least on recent versions of both Mini vMac and Basilisk. Notice that Basilisk sets the Sony pointer to DEADBEEF. Ha. At some point, maybe I'll check out Sheep Shaver as well. typedef enum { kEmulatorType_Unknown = 0...
  8. David Cook

    Software detection of emulator

    Hello everyone, Does anyone know how to detect if an application is running in SheepShaver, Basilisk II, or Mini vMac? I'm writing a serial transfer utility and thought it would be nice to synchronize the real Macintosh's clock when it is connected to an emulated Mac. For Basilisk II, I notice...
  9. David Cook

    Macintosh IIfx Misc: screw size, repairs, 1989 memory, and box

    Hmm. I wonder if I could retrofit my earlier power supplies. Same here. They are all good.
  10. David Cook

    Macintosh IIfx Misc: screw size, repairs, 1989 memory, and box

    Well, thank you! My wife sees this compulsion to fix broken things as a cry for help.
  11. David Cook

    Macintosh IIfx Misc: screw size, repairs, 1989 memory, and box

    Here are some leftovers from various IIfx adventures. Macintosh II, IIx, and IIfx Screws These three computers share the same size fasteners for the securing the drive tray itself, the hard drive tray, and the floppy drive trays. Two more screws also hold the motherboard. I find a lot of these...
  12. David Cook

    LC III: internal speaker works intermittently when pressing on the external audio jack. Audio plays through external jack when connected.

    There is so much good content on this forum that sometimes really apropos material gets buried. If you follow my step-by-step method, you'll get your sound working... https://68kmla.org/bb/index.php?threads/lc-iii-no-video-no-sound-and-weird-schematic.39651/#post-446476
  13. David Cook

    Macintosh II misc: ADB port differences, sound error false positive, 68851RC12

    While restoring a Macintosh II, I ran into some interesting things. MMU Cover Up This 68851 MMU was originally certified and labeled as 12 MHz. Yet, someone has covered the speed with a little black spot. The proper certified speed in the Macintosh II should be 16 MHz or better. So, was this a...
  14. David Cook

    SuperMac Spectrum 24/V Display Problems

    I am on the edge of my seat!
  15. David Cook

    SIMM 'bank clips' for broken plastic retention clips

    Has anyone ever seen a "SIMM Removal Tool" #076-8354? https://vintageapple.org/macbooks/pdf/Service_Guide_Macintosh_Computers_March_1991.pdf
  16. David Cook

    SuperMac Spectrum 24/V Display Problems

    This is really good news! You now know that the bad signal is not going through any of the chips that you removed. It is likely one of the other red chips. >> The other is the array of shapes/colors when running above 1 bit color. Maybe. Or, perhaps the RAM is being used for more than just a...
  17. David Cook

    SuperMac Spectrum 24/V Display Problems

    Can you show a picture with the solid line and the dark line on the logo? If the solid line appears where a blank line should be, then it is not a RAM issue. If a solid line appears elsewhere, then you haven't found the right ram chip yet. If the solid line appears at random locations each boot...
  18. David Cook

    SuperMac Spectrum 24/V Display Problems

    1. You said it was intermittent (the first part of your very first message) and that the board had significant physical damage. That sure suggests a cracked solder joint or hairline trace crack. 2. The solid lines are gone now. That suggests that one of the chips you removed is in the bad path...
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