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paws

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  1. paws

    RaSCSI Development Thread

    Does it use a normal FAT file system that can be read on a computer? I think a lot of old music gear like this had proprietary file systems. Probably a simple one, but I think there'd be some coding needed.
  2. paws

    RaSCSI Development Thread

    Is this (on the hardware side) capable of being a SCSI host? SCSI was common on samplers (musical instruments) from the late 80's to the late 90's as a way of transferring audio directly between a computer (which would act as the host) and the samplers memory, using a SCSI-based protocol called SMDI. I think many people would be interested in a Pi that could do this trick.
  3. My impression is that the custom chips in anything after the SE get a lot more complex, but that reimplementing the GLU chip seems fairly easy... The video system in the SE is a variant of the original's, as far as I can tell, very simple stuff. Not saying the later ones are impossible to recreate, of course, but that's when they start keeping separate video RAM etc. If you want to do a faithful clone of a 68k Mac, I think the SE is a good choice.
  4. Oh, wow. That's actually very useful.
  5. 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!
  6. 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.
  7. Hi! Can anyone recommend a good, quiet fan to replace the one in my Quadra 700 power supply?
  8. 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.
  9. 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.
  10. 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
  11. I'd love to hear about these projects you allude to btw.
  12. 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)
  13. 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.
  14. paws

    Recapping Macintosh IIci?

    This'd be a great service, I think.
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