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Recent content by demik

  1. demik

    Cloning the Farallon MacRecorder

    Add like 10-100nF caps from TxD+ to GND (serial) and TxD- to GND (serial). Don't see why that wouldn't work, unless the PIC power consumption is > 1 mA
  2. demik

    Design68: A 65% replacement keyboard using AppleDesign controllers

    @joshc nice, good job ! It will fit nicely with your translucent SE/30 :)
  3. demik

    Design68: A 65% replacement keyboard using AppleDesign controllers

    @jmac they are not used much. The controller blink them after initialization and that's about it. IIRC, the one under Power is actually "Num lock" and the other one is "Scroll lock". Like on a real Mac, these LEDs are not very useful. You can make them blink with something like ADB Express...
  4. demik

    Cloning the Farallon MacRecorder

    @Phipli that was for me. Thanks again :) I ended up building a prototype with the schematics from MacGarden. It didn't work, but may be an error on my part (not working = not visible by software) Then someone provided me a real (working) one, and the schematics don't match, different ICs, PIN...
  5. demik

    Well, using the chassis as a heatsink is a good way to avoid increasing the BOM :)

    Well, using the chassis as a heatsink is a good way to avoid increasing the BOM :)
  6. demik

    Throwing 64K ROMs into a Mac Plus ?

    Yes, as most of the SCSI upgrades. Some board asked for Plus ROMs, others had patched 64k ROMs in other way or another. The Beck-Tech MacMEGABYTES used a second set of ROMs to patch the 64k ROMs
  7. demik

    Throwing 64K ROMs into a Mac Plus ?

    The 64k ROM assumes that the max RAM possible is 512. Since video and sound buffers are at the top of memory, this can't work The 68k ROM make the CPU writes at the top of 512kB of RAM, and your logic board video/sound circuit reads at the top of 1024kB of RAM
  8. demik

    Design68: A 65% replacement keyboard using AppleDesign controllers

    Missing keys, broken case mostly. Can you see your keyboard with ADBParser ? The three LEDs flashing the first time is a good sign. It means the controller is alive. The LED trick I've seen it fail with working keyboards, don't know why. I will go with either your matrix is fully dead, or it's...
  9. demik

    NUBUSPAS16-DB :: A daughterboard hack to restore some functionality of a standalone MediaVision PAS16

    I will switch to a few others projects for now, but maybe someone can take it from here !
  10. demik

    NUBUSPAS16-DB :: A daughterboard hack to restore some functionality of a standalone MediaVision PAS16

    Thanks ! I didn't have a blank bracket around but that's a good idea ! The "someone" is me. Don't bother, I found the resistors values. I did this project using your previous pictures, so thanks a lot !
  11. demik

    The Pro Audio Spectrum 16 NuBus's YMF262 FM synthesizer...

    @Mr. Ksoft thank you that did it. It does indeed sounds like the stock game
  12. demik

    NUBUSPAS16-DB :: A daughterboard hack to restore some functionality of a standalone MediaVision PAS16

    Some measurements and subjective remarks. This has been benchmarked against a Quadra 650 board (Wombat). I did it to double check something wasn't broken with the daughter board Output levels The last notch on the PAS16 Control Panel volume is an overdrive, 100% volume is last position minus...
  13. demik

    The Pro Audio Spectrum 16 NuBus's YMF262 FM synthesizer...

    Nope, not any better 😕
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