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aperezbios

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  1. I'm looking for a list of capacitors/sizes/values for the Delta SMP-220DB PSU,as used in the PowerMac 8100/80 and Quadra 800/840AV. If anyone has created one, if you'd be so kind as to share it, that would be greatly appreciated. My 26-year-old PowerMac 8100/80 thanks you in advance
  2. Attached is a seven-page excerpt from the Apple Developer note PDF, which is 94 pages, and contains the authoritative info I was looking for. Apple 5500-6500 CommSlot II specs.pdf
  3. Does anyone here have or know of any reference documentation from Apple for CommSlot II specs, and pinouts? and CommSlot I? I found the original CommSlot I pinout documented on Apple's website, as TA31498
  4. Agreed, way off topic, but I think it'd be very interesting to perhaps see if you could add modern wireless connectivity to CSII machines by way of an RPi Zero W, or other low cost SBC with wi-fi. It would need to use the serial interface, hopefully at a reasonably high speed, since most low end, modern SBCs don't have any sort of PCI support. Does anyone here have or know of any reference documentation from Apple for CommSlot II specs?
  5. This isn't an accurate depiction of the current state of things, these days, in all circumstances. Most consumer SD cards do have some form of simplistic wear leveling, although the specifics are considered industry secrets. Many SD cards now exist for custom write-heavy uses, which may have a larger array of pre-reserved blocks for re-allocation later in life, if cells/blocks go bad. And then there are the rather expensive Single Level Cell SD cards, which Panasonic and Delkin Devices, as well as a number of others make. They're costly for a reason.
  6. It's actually still a true statement, even if it's not for you. The numbers don't lie. The good news for you, though, is that we envisioned this use case (V5.5+IDC50) long ago, and have a couple of very straightforward solutions to it, along the lines of what you're referring to:
  7. Apparently they meant MacSD, which shares no firmware or hardware design with SCSI2SD at all. I have one, and they're nice, but I ran in to some of the same issues as @cheesestraws did, and while it has a nice feature set, it's not the most affordable solution. Since someone brought it up earlier in this thread, SCSI2SD V5.2 has been released, replacing V5.1, which we've been sold out of for over a month. Further details in the linked thread above.
  8. These are now available for purchase at https://store.inertialcomputing.com/ProductDetails.asp?ProductCode=SCSI2SD-V5.5-2.5-inch
  9. This sounds like it could be a double-termination issue. Does the external enclosure have its own termination? Try disabling termination on whatever device is mounted externally, and see if it makes any difference in behavior on boot.
  10. For the record, that warning only exists because people have been known to mis-wire the 12 volt line to 5VDC when making their own cables, and _that_ will fry a SCSI2SD. However, simply providing 12 volts from a normal four-pin cable is perfectly safe. The 12 volt line simply isn't routed anywhere on any version of SCSI2SD.
  11. That's definitely not accurate, I've been using one in my 630CD for literal years. Large CF cards, or cards that don't speak "true IDE" will likely fail, though.
  12. As of august of 2019, the situation has changed significantly, for the better: https://www.zdnet.com/article/microsoft-readies-exfat-patents-for-linux-and-open-source/
  13. Normally, yes, but V5.5 is a "direct attach" style device, designed such that no cable is needed.
  14. It could be the 53C80 SCSI controller itself. Is it known to actually work? It's soldered down (not socketed) on the SE, I believe, but you might want to consider trying to replace it, if you don't know that it's functional.
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