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About Franklinstein

  • Birthday January 20

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    Macs, Japanese cars, disco

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    Network infrastructure technician

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  1. The floppy drives are mostly compatible but there are specific differences in some models. For example, the 400k floppy drives don't work in 800k Macs without changing the cable (from red to yellow-striped, important if you were putting a Plus logic board in a 512k case with the original 400k floppy drive). Also, there were changes in the floppy controller in the mid-90s that prevented the use of auto-inject floppy drives with (primarily PCI-based) Power Macs. You could still use an auto-inject floppy drive in one of the later Power Macs if you cut one of the wires in the floppy cable, but the
  2. From about 2001-2003 I alternated between using a Performa 475, PM 6100/60, and a 6200/75 on the internet (with a dial-up modem, mostly with NetZero). They were still usable, especially for AIM and light web use, though the G3MT and blueberry iBook I bought at the end of '03 were quite a bit better, especially once Flash and JavaScript pretty much took over everything. If I could still use the AIM client for 68k Macs, I would. On topic, I recently bought a Performa 640 DOS because a; it has the crazy DOS subsystem that plugs into the '040 socket and PDS slot, and b; it's one of the
  3. Yes I'm pretty sure I'm in many of them. In a nutshell: I think the original 75MHz 5200/6200 was a bit of a misstep, or at least feels that way when compared to the outgoing 61xx (according to Everymac, the first 6200 versions were priced only about $100 less than a 61xx at introduction and the 6200 performed no better or was even slightly slower in some cases; you may have got a better deal buying a discontinued/refurbished/used 61xx bundle), but the followup models were really not terrible; I rather like my Performa 5270. Also the LEM guy who wrote the original error-filled screed against th
  4. No, there was a late run of the 5x/6xxx that used 120MHz processors. Supposedly the Performa 5320 was one of them but there was a thread I created a while back that had the box (and the CPU itself) clearly listed as 100MHz instead. Some spec pages on the internet also list them at 100MHz yet there are resources elsewhere that claim 120Mhz, so who knows what the deal is with those things. It was a confusing time at Apple. Anyway, these weird 100 and 120MHz soldered-ROM boards are Apple p/n 820-0751-A so you can do an image search or possibly buy one for yourself and you'll notice th
  5. That Molex cable supplies one 5v, one 12v, and two ground lines. The SCSI2SD only uses the 5v line while ignoring the 12v and without a load on it the 12v line may have some hiccups that could adversely affect things. Just a thought.
  6. A number of PC ATI video cards will work in a Mac but often you'll need to move a resistor or two and flash it to a Mac firmware. The Mac Elite wikidownloads2 page has a pretty good listing of cards that are hackable but you'll likely need a PC to do the flashing. For video card functionality on a Mac, it depends on which model: if it has built-in video and you install a NuBus or PCI card, the Mac will go to whichever device has something plugged into it, so if you have two displays connected, your onboard video will run as your main screen by default; the secondary card should com
  7. The original 603 from the first 75MHz 52/62xx machines used 8k+8k split caches (the later 603e was 16k+16k) which was too small for the Apple 68k emulator to fit into, meaning it had to be run from slower off-chip memory instead, hence the poor performance with 68k code. If the chip had used a combined cache like the 601 did they may not have had that problem. However Connectix may have been able to either squeeze their emulator into 8k or split it effectively across the two stores, or it may just have been that much more efficient (they were excellent when it came to fixing Apple's shortcomin
  8. Has the problem machine been recapped? You could be having power stability problems since there's going to be a pretty noticeable difference between the power draw of a typical HD and a SCSI2SD. Does the SCSI2SD even use the 12v line?
  9. The inverter boards occasionally die as well. I don't really have any tips or tricks for diagnosing which one is at fault though; I just swap known-good parts until something works and then replace the bad assembly. It's difficult to get the individual tubes for those IBM LCD panels and I don't know how to effectively troubleshoot the major components on the inverter board.
  10. I have one, branded T-ZONE, that has both the mouse and keyboard pouch on one side. The top has a slit pouch for cables and whatnot and also includes two fabric bags that appear to hold either cables or other accessories as they're too small for the keyboard or Mac itself yet too big for the mouse. Otherwise it's basically the same as the one pictured. I found it at a thrift shop a while back and a highly modified SE lives in it now.
  11. You probably saw the early 4400-specific model. Those were huge, roughly 2x taller than the later 64*54 models, and AFAIK only available at 240MHz. The 64*54 would probably work in a 4400 or other Tanzania clone but it's designed to be smaller to fit comfortably in the Alchemy models. They're a good choice to use in a Power Color Classic mod since they don't require you to cut away the chassis to fit unlike the taller Sonnet cards.
  12. That's really unfortunate. Could one of the vias have caused it, or maybe one of the larger lugs at the rear of the board? Maybe if you have a sensitive tone generator and pickup you could potentially trace out the current flow to try to find where it connects or at least narrow your search a bit.
  13. You're probably correct there though I'm not sure if the screen redraws involved a CPU interrupt or were simply executed during natural processor wait states/in between clocks. But there were tons of compromises back in the early days for stuff like that, such as the IBM PC's use of the 4.77MHz processor clock to allow it to interface to cheap and pre-existing NTSC TV circuits. Same with Macs using 15.67MHz CPUs instead of a round 16MHz: it was done to match the dot clock of later displays and simplify the circuits required. Lots of weird choices go into saving a buck or ten. As fo
  14. I'm pretty sure the bulk of it is being able to cope with either 40 or 50MHz buses without hassle (Sonnet makes a big deal about their 'no switches, etc' motto) and possibly only certain speed ratings or model revisions could auto-detect and switch between 40 or 50MHz, hence the restrictions. Sonnet's Fortissimo trickery would be required if you wanted to try to run an x400 model at 500MHz (the PPC 750 will not clock over 10x bus speed, so you'd have to fake it using Fortissimo if you wanted 500MHz on a 40MHz bus). The L2 cache slot form factor may have been too small to work Fortissimo into t
  15. You and probably everyone else. This thing is kind of neat but no way is it $2400 neat. You can get a useful computer for that price and not be stuck with the horror that was the 5300. Maybe you can carve out the display area to fit the 3400's 12" screen and logic board in there instead? But then you'd basically just have an overpriced TAM; for that price you can get a nice boxed TAM with money to spare for a fast G3 upgrade and an SSD. Anyway this thing looks like something that could be done with a good 3D printer. I'm sure if he runs out of projects @maceffects could make an updated and rea
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