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  1. bigmessowires

    Mac IIci PSU recap advice

    Anyone have a list of caps in the IIci PSU (Astec version), or a walk-through of the process? After disassembling the PSU (a complex enough job by itself), I was surprised by the complexity inside. There are four separate PCBs and something like 30 individual caps. Many of the caps are...
  2. bigmessowires

    IIsi and IIci Power Problem Troubleshooting

    My IIsi and IIci are both having trouble booting, with the same symptoms. Both systems worked when I put them in storage about 2 years ago. Both logic boards have been recapped. The IIsi power supply was also partly recapped. I don't remember about the IIci power supply. When the power button...
  3. bigmessowires

    Need Testing Help with Mac External 400K/800K Drive

    If you have a multimeter and a Macintosh External 400K or 800K floppy drive (models M0130 or M0131), I could use your help with a quick test. Put your meter in continuity check mode (where it beeps if there's a short circuit), and test for continuity between pin 9 of the drive's connector and...
  4. bigmessowires

    iBook G3 with 9.2.2 displays undersized desktop

    Hi everyone, I recently acquired an iBook G3 800 MHz, and Mac OS 9.2.2 won't seem to fill the laptop's entire screen. It works normally under OSX, and also is fine when first booting up 9.2.2. But midway through the 9.2.2 boot process, while it's loading extensions, the screen suddenly shrinks...
  5. bigmessowires

    Opening classic Mac disk images with OSX

    I just stumbled onto something that surprised me, but I'm not sure if it's common knowledge. Current versions of OSX (at least 10.13 High Sierra that I'm running) are able to mount and open classic Mac HFS disk images! I had thought this capability was removed in OSX 10.7, and I guess it was for...
  6. bigmessowires

    Vintage Mac as Crypto-currency Tool

    I was inspired by another thread discussing the emerging (?) use of vintage computers for privacy reasons, due to their immunity to modern spyware and malware and other unknown malicious stuff. So here's one concrete example.  Let's say you want to get into Bitcoin. You could create an account...
  7. bigmessowires

    Source for IWM Chips?

    Does anybody know where I might find IWM chips (the Integrated Wozniak Machine disk controller), other than by desoldering them from old motherboards? I'm 99.9% sure there's no other source, but it can't hurt to ask. I'm considering designing a disk controller card for the Apple II that needs...
  8. bigmessowires

    Mount SCSI2SD card in Windows

    Is it possible to mount the SD card from a SCSI2SD in Windows, so I can edit the contents of the disk image and add software downloaded from the web? I saw some references to doing this with Basilisk II's SCSI emulation mode, but when I try to enable SCSI in the Basilisk II GUI it complains...
  9. bigmessowires

    Enabler for Macintosh LC III?

    I'm trying to boot a Mac LC III with a generic install of System 7.1, and getting an error message at boot-up time complaining that 7.1 won't work and I need a newer System. But as far as I know, System 7.1 should work on the LC III, and is the OS it shipped with originally. Do I need a special...
  10. bigmessowires

    Homemade Mini Case for LC, P475, Q605

    Here's my entry in the "design a custom case" bonanza! Like Trash80toHP_Mini, I'm making a case for the LC series pizza-box computers, which also includes the Performa 475 and Quadra 605. It'll be just the logic board, power supply, and SCSI2SD for main storage. No fan. No floppy drive, but...
  11. bigmessowires

    SCSI2SD "Load Failed"

    I'm trying to configure a hand-built SCSI2SD v3.0 board that I acquired in a trade some time ago, but never used before today. I’m having some trouble getting it going, and I’m not sure if I should be troubleshooting the board, or if I just don’t understand what I’m doing - which is likely...
  12. bigmessowires

    Performa 6205 - YUCK!

    Yesterday I received a Performa 6205, and I quickly found that I hate it. Compared to all the other vintage Macs I've ever used, it's super heavy, loud, and an incredible pain to disassemble. I got so frustrated trying to take the thing apart, I almost smashed it to pieces with a hammer just to...
  13. bigmessowires

    Imagewriter II Ink Ribbons

    What's a good source for Imagewriter II ink ribbons that will actually work? I see several listed on eBay, but most are described as "POS". I'm not sure what that acronym means (other than piece of sh-t) but I'm guessing it's p----- old stock. I believe these ribbons have a relatively short...
  14. bigmessowires

    Overclocking a Quadra

    Has anyone ever overclocked a Mac Quadra to 40 MHz or higher? How was the experience, and did everything still work correctly afterwards? I have a sudden and completely irrational desire to possess a 40 MHz 68040 Mac, but the only true example is the 840AV which is too bulky for my taste. I've...
  15. bigmessowires

    new case styles for Floppy Emu

    Hi gang, I've been experimenting with some new laser-cut case styles for Floppy Emu (my Apple disk emulator), with the idea of eventually replacing today's clear acrylic case. I'd appreciate your feedback on these concepts. There's a longer post about this on my blog, if you're...
  16. bigmessowires

    tool to put .sit file in a disk image

    Hi everyone - somebody here once pointed me to an OSX tool that could easily create an HFS disk image containing a .sit file. I used it, and it worked great, but now I've forgotten all details including the name of this tool. This is mainly for people using Floppy Emu, but could be helpful when...
  17. bigmessowires

    Calling Color Classic owners: logic board floppy connector?

    Could any Color Classic owner tell me if there's something non-standard about the floppy drive connector on the logic board? Every Mac I've ever seen has the same 20-pin shrouded header on the logic board - a 10x2 arrangement of pins that's surrounded by a rectangular plastic guide. But recently...
  18. bigmessowires

    Mac Goodies at Silicon Valley Electronics Flea Market

    Today was the monthly electronics flea market at De Anza College in Cupertino: http://www.electronicsfleamarket.com/ There's often a bit of old Apple stuff there, but today was exceptional. There were several different vendors with ImageWriters, LaserWriters, keyboards, disk drives, power...
  19. bigmessowires

    SE/30 ram removal technique - arrgh those clips!

    What's your technique for safely removing RAM from an SE/30? This one has bendable plastic tabs on each end of the socket, with a post on the end of the tab that sticks through the hole in the SIMM. For the life of me, I can't figure out how to remove this thing! The plastic tabs are stiff and...
  20. bigmessowires

    SE/30 + dougg3 rom simm testing help requested

    If you've got an SE/30 and the dougg3 ROM SIMM (2MB or 8MB), would you help me test a modified version of the ROM image that I've developed? It works great on my IIsi and IIci, but not on the SE/30. I need help to find whether it's a software or hardware problem. The ROM image is attached. If...
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