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Compgeke

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About Compgeke

  • Birthday 01/06/1997

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  1. Turbo 601 66 MHz in Mac IIcx?

    A IIcx is an '030 so a socketed '040 adapter wouldn't do much good.
  2. iMac G3 DV SE recapping

    Yes you can, just make sure polarity is correct. Capacitors have progressed a lot over the years leading to smaller needed sizes for the same value.
  3. Marathon Computer iRack DV

    I seen this on Craigslist for $10 and just had to have it. For those of you who don't know, Marathon Computer was a company who made rack mount things for Apple computers. Whether rack ears for your Powermac G4 or an entire case for your 9600. In this case, a 1U rack chassis for an iMac G3 DV logic board. This one's 500 MHz, out of a Snow White based on the order number. The front is pretty unassuming. No fancy "PowerPC" or anything, just the ports, a slot and a Marathon badge. From the back you get all the ports an iMac G3 DV had. The ports on the far left are to be linked over to the ones on the right if you want the front panel ports to work. Otherwise, leave them disconnected and you won't have front panel ports but you'll keep all the ones on the rear. A view from the top shows just how sketchy these things are. There is no attempt at cable management by design. The board is just thrown in at a weird angle (to make ports line up), VGA port ribbon kind of wedged between boards, etc. The ram is installed on a pair of right angle adapters. Without these the ram sticks up too high and fouls the top. The biggest weird thing is this board. It's marked fan control, but I'll be damned if I know what that's about. It has the connections for the speaker and the power button/LED and then four 555s. What they do? Beats me. Finally, know what's cooler than an iRack? How about two
  4. RE Clock: This is going to sound dumb, but have you checked the battery? If the battery is getting low it's going to drift.
  5. It may just be that the power lines or something aren't making contact so it's not even recognizing there's something in the slots. It's hard to tell without removing them to see what's going on. Unfortunately finding replacements can be a bit more difficult, I'm not sure if anyone still makes 30 pin simm connectors but asking around on marketplace here you should be able to find someone willing to suck a few out for you. It seems you're a bit worried about removing the slots though. If you want my advice, it's equipment upgrade time. Pick up a ZD915 or similar ~$100 desoldering gun and it'll make easy work of those. As long as you don't shove hard and scrape the tip on the board, or set it to something insane like 400*C, it's more difficult to do damage.
  6. SCSI2SD + Hard-Reset = No booting

    I've actually got a similar issue with my v5 board. If power is improperly removed, it corrupts the OS. When attempting to boot from it you'll get happy mac -> back to grey screen -> happy mac -> repeat. Doesn't matter if it's system 6 or system 7. Only real fix I had was to recopy the system folder over. Just booting from another device and coming back didn't fix it.
  7. If you've got a long enough cable you can. With a double connector cable and a molex splitter you could even do hard drive and cd off the internal connector, just can't mount the CD.
  8. iMac G3 (Rev A -> C) G4 CPU Upgrade

    The real issue with the IBMs is they have their own non-removable motherboard cache and as such don't like having it on the CPU. If I had a G3 ZIF without any cache it just might work. No idea on how they handle multiplier. They were offered in two different versions, a 233 MHz 604 and the 375 MHz one so they do support adjustable multiplier and bus. Probably resistors on the CPU card itself. Of course, there's almost no documentation on the IBMs.
  9. iMac G3 (Rev A -> C) G4 CPU Upgrade

    Worthy of note on the IBM computers with a ZIF: They're just a CPU card without any cache or anything. Good chance it's just the 60x bus directly on the pins from the CPU, possibly even in the same pinout as the BGA chip. If someone wants to grab one and desolder the chip, it'd be possible to cross reference the chip datasheet and the BGA pads to pins. A lot of work, but doable. I've attached the datasheet that has the pinout to this post. Another IBM note: they won't work with cards that have an onboard L2 cache like the Macs have. Trying a 450 MHz G3 CPU (PPC750L-EB0A450) in an RS/6000 43P-150 will throw an E24C "L2 cache array test fails." error. Knowing the pinout would be interesting as it may be possible to make a G3/G4 upgrade for the 43P-150 (and B50). Not that it'd be a worthwhile time investment, I doubt all 3 of us with such a system would be super interested. 604eBGA_Datasheet.pdf
  10. I'd go ahead and try finding another install image and see if it works instead. Sometimes the discs will mount but not boot. Sometimes they'll boot on one system but not another. Another alternative if you have a USB IDE adapter is to use sheepshaver (or emulator of choice) to install the OS onto an image the size of your 6200's hard drive then write it to the 6200's drive with DD or utility of choice. I've made use of that method a lot on systems with smaller hard drives. Being as you've got a Macbook this also has the advantage of making it really really easy to transfer software over without floppies or breaking resource forks.
  11. Do you have any other systems to try the CD with? Being a home burnt CD it's entirely possible the issue is with the CD rather than the system itself. It'd be worth tracking down another image (even if it's another version) and see if it works.
  12. Flashing a PB3112 SATA card

    Here's my method of doing it easily: There're a few other ways if you dig around the forums, although I had various levels of success using them. The Wiebetech ROM is easy to flash but it won't work under classic Mac OS. The Seritek ROM is a bit more difficult to flash but it'll work with everything.
  13. ^ That's the kind of situation with a GFCI (RCD) should've helped. The chassis on an ATX PSU is almost always directly grounded and the short to case would've tripped it over.
  14. Powerbases, L2 caches, and some chips.

    In that case, the cache dimms are compatible between all the PCI macs to the best of my knowledge. Trying to find a 1MB one is a bit difficult though, all the ones I've had were 256K or 512K.
  15. Powerbases, L2 caches, and some chips.

    Beware, good chance of magic smoke if you try this. It's very unlikely the pinout is the same between an IBM and a Mac.
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