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  1. M

    Duo Dock Strange Boot Icon (Picture)

    Out of curiosity, what SCSI IDs are you using for images on your ZuluSCSI? Just one image of ID=0, or are there other images present?
  2. M

    Macintosh Classic II - Mistake during recap

    I doubt you’ve fried the LB. There’s a lot that needs to work right in order to get to the point where it shows the blinking question mark floppy, so that’s a really good sign. A few guesses: 1. The floppy probably has a short somewhere, likely introduced when you recapped it. A short on the...
  3. M

    VIA Plus: a small debug board for 128K/512K/Plus

    That’s really cool, thanks for sharing!
  4. M

    Mac IIfx Refurbishing Phase II - PSU? Log of work, first repair on it in 7 years

    How does the fan on the power supply seem? Are you running your tests with the lid on or off? I’m not sure which direction the air flows on the IIfx, but you may not be getting airflow over the RAM with the cover off, or with a bunch of other cards installed. You could try balancing a small fan...
  5. M

    Powerbook Duo 280c + Accessories Maintenance

    What spot welder are you using? I have a number of batteries I want to recell or rebuild in new 3d printed cases, but I’m not sure which spot welder to get. It seems like it’s one of those product categories with infinite options of dubious quality…
  6. M

    Powerbook Duo 280c + Accessories Maintenance

    Glad you figured it out, that’s great! I’d guess that someone enterprising could take measurements of the battery contacts on the LB and battery and design a 3D-printed alignment tool. I’m sure you can manually tweak it using the battery as a guide, as long as the battery has the same alignment...
  7. M

    HDI-45 to VGA DIY attempt

    Hey, it’s you! I thought I’d seen your user name on both forums, but responded quickly to this thread and got lazy 😃 Thanks for working on this project - the HDI-45 was annoying enough when adapters were easier to come by, and are downright painful now that they aren’t. I’m glad to see a...
  8. M

    Powerbook Duo 280c + Accessories Maintenance

    Does DuoMon (attached) detect the battery and show the serial number? Do you have the Type III battery extension installed? What version of system SW do you have installed?
  9. M

    HDI-45 to VGA DIY attempt

    There’s someone over on TinkerDifferent working on a new adapter design: Post in thread 'Need solution for HDI-45 to DB-15 connectors for video out' https://tinkerdifferent.com/threads/need-solution-for-hdi-45-to-db-15-connectors-for-video-out.4056/post-35818
  10. M

    7100 dead now

    You mentioned that you repasted the CPU - hopefully this isn’t the problem, but my understanding is that the 601s are extremely fragile and are easy to crack the die when reinstalling the heatsink. I’d try to check other issues first (power/ground shorts, proper voltages, etc, visual inspection...
  11. M

    PowerBook Duo battery replacement

    Also, the keyboard interfaces with the PG&E, so the soft power button above the keyboard doesn’t work if the PRAM battery is dead and the Duo hasn’t been booted since being reconnected to power. In this case, the power button on the back of the Duo can be used to force power on, which will allow...
  12. M

    PowerBook Duo battery replacement

    Here’s the data sheet for the modern-ish version of the chip, pin 3 is a no-connect: https://www.analog.com/media/en/technical-documentation/data-sheets/DS2401.pdf Note that Apple ordered a custom variant with their own fixed-prefix to identify them as the manufacturer and to identify the...
  13. M

    PowerBook Duo battery replacement

    The pinout order is: BATT(+) Thermistor GND 1-Wire ID chip BATT(-) So - A is the thermistor (so the Duo can read the battery temperature as part of the charging algorithm), B is the DS2400 ID chip, and there should be two fuses inline with the cells (C is one of them, there should be another...
  14. M

    PowerPump"ACCELERATOR" from NewerTech: is it worth cloning?

    Very cool! It’s considerably more complicated and full featured than I expected. Here’s my guess about how it’s working after reading the manual (but I haven’t tried looking up the IC part numbers, this is all speculation): 1. The clips on the oscillator force the enable low, disabling the...
  15. M

    Using Magneto Optical drives on vintage 68k Macs

    There are a few sellers with 640 MB Fujitsu MCC3064SS drives around $60, mostly selling out of China. I picked one up a while back to replace a dead one, and while it took forever to get here it worked great. YMMV of course, but I was happy with how it turned out for me.
  16. M

    Duo 210/230: fancy artwork on early PG&E chips?

    That’s pretty cool! My 230 that I recapped has the normal text-only markings. Recapping my other 230 is low on my list of projects, but I’ll post pictures if I find the line art in that one.
  17. M

    MacMAME 0.28 Rom Set?

    Haven’t tried it yet, but here’s the announcement thread on their forum: http://system7today.com/forums/index.php?topic=3277.0 Looks like it should be hotline.system7today.com
  18. M

    Just got a Macintosh 512k and I have some questions

    The TashTwenty was created by @Tashtari, as documented in this thread: https://68kmla.org/bb/index.php?threads/tashtwenty-single-chip-dcd-hard-disk-20-interface.39357/ Ko-Fi is the platform Tash uses to sell his projects, here’s his shop link: https://ko-fi.com/tashtari/shop
  19. M

    Iomega scsi zip 1GB

    I’m glad you got it working! For context, the 29-pin vs 30-pin distinction was because Apple originally created two different SCSI cables for the PowerBooks. The 29-pin one was for connecting standard SCSI devices to the PowerBook, while the 30-pin one was for connecting the PowerBook to...
  20. M

    Calling all ROMs! Collecting DeclROM data

    Well that’s unfortunate! Thanks!
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