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paws

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  1. I have no use for these unfortunately, but I'd almost get one for scuzzy the snail alone. Hope to see it on other products. What a mascot!
  2. I'm not actually sure it's the original in there, I think I replaced it long ago with something cheap that kind of fit. I've added two big Nubus cards so I'm a lot more worried about airflow now.
  3. Hi! Can anyone recommend a good, quiet fan to replace the one in my Quadra 700 power supply?
  4. paws

    A tale of 3 Tibooks...

    I remember when the TiBooks came out, how beautiful and powerful and ahead of everything else they seemed - it's also quite amazing how well the look has held up, I think. These look to be in extremely good condition, what a catch. I missed one locally a few months ago and I'm still a little sad about it.
  5. At the risk of derailing your thread completely, do you know how big a difference there is between SCSI hosts and SCSI targets? Would it be possible to use hardware as (relatively) simple as yours to implement a SCSI host? The reason I ask is because there exists a standard, SMDI, that computers like old Macs used to load audio data directly into the memory of samplers (musical instruments) via SCSI, and I've long wanted to make something that made that possible from a modern computer - but it basically involves pretending to be a host. The specific command set related to the activity is quite simple, but I don't know anything about all the stuff around those commands, nor the electricals.
  6. Yeah, those could work as well! Supposedly also some of the MAX II and MAX V CPLDs from Intel/Altera, by use of an external resisting (current limiting, I'm guessing): https://www.intel.com/content/www/us/en/products/programmable/cpld/max-ii.html https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/pt/max-ii-product-table.pdf https://www.intel.com/content/www/us/en/products/programmable/cpld/max-v.html https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/pt/max-v-product-table.pdf
  7. I'd love to hear about these projects you allude to btw.
  8. I don't know much about GALs, but from those equations it looks like it's just combinatorial logic? I've been playing a bit with the Lattice FPGAs that somebody made an open source toolchain for, and if I'm reading this correctly it'd be extremely simple to implement in one of those. The syntax is a little different but you could probably translate those equations to Verilog with a bit of your favourite text munging tool. There are two problem with picking out a device: first of all, voltages, of course, since nothing modern is going to like 5V. You can still get some 5V parts, both FPGA and CPLD, but quickly glancing at Digikey, there's not really anything that has the ~90 i/o I'm counting for this board - they're mostly smaller ones. The big ones are all obsolete and very expensive. If you could accept using two or three it looks more managable, e.g. the Xilinx XC9500XL series. Level shifting is of course totally doable, but at that point I'd probably start thinking about whether you want to use a real '030, and not get a perhaps slightly bigger chunk of programmable logic and stick a soft core in there. That'd make business sense, but maybe not aesthetic sense... (and that's not being snarky - I've actually spent the past few days desperately resisting the desire to make a board with a smallish FPGA and a 68SEC000, a 3.3V 68k that's still in production)
  9. paws

    PCMCIA SD Card - Compact flash

    Not tried that, but I have a very generic-looking PCMCIA SD card reader that works fine with my Lombard.
  10. paws

    Recapping Macintosh IIci?

    This'd be a great service, I think.
  11. paws

    China Ebay 68040 processor

    Mine says FPU: Built-in Hardware FPU: Yes.
  12. paws

    China Ebay 68040 processor

    Well, mine just arrived and it appears to be a genuine full 68040, 33 MHz, according to TattleTech. This was the auction: https://www.ebay.de/itm/361225888013 I give them a low offer first, they returned with 43USD.
  13. paws

    Dead Performa 475

    I have 132 mb in the Quadra 650 I'm putting together. It takes ages to boot and I can't see myself ever using half of it, even doing audio. Nice job on the troubleshooting here.
  14. paws

    China Ebay 68040 processor

    Gulp. I just ordered a 33 mhz 68040 from Hong Kong. Hoping it'll be a good one, will be sure to report back.
  15. paws

    Macintosh 7100/66 Fried PSU

    Hi, I can't help you much with troubleshooting, but generally in electronics just become something burns doesn't really mean it was causing the problem, it just means that something went wrong, somewhere, and this part was the one that couldn't take it. The most common type of component to fail is electrolytic capicitors. They're often used as filters, and as they get older they dry out and don't filter as well as they used to. I have heard of that causing other components to give out like this. This board looks quite badly damaged, though, I'm not sure how much time I'd spend on it.
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