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Recent content by jeremywork

  1. jeremywork

    Making modern iMac G3 Mezzanine peripherals

    Considering the motherboard PCB runs directly between the mounted ports and the mezzanine (except the modem; that's a daughterboard) I don't think a VGA port will fit there. (Not S-Video btw, that's a legacy serial port borrowed from the IrDA.) I'd sooner try to move the factory iPort PCB into...
  2. jeremywork

    Beige G3 Locks Up at Welcome to Macintosh Screen?

    I'm relatively sure OS 9 runs a second memory test including a cache test at the point shown. Failing the cache test usually produces a message to contact a service technician, so I'd start by pulling some of the RAM to see if it's stable in a reduced configuration. If you were able to get...
  3. jeremywork

    I'm still after one of those RasterOps cards too, they're far less common than the Thunder/24...

    I'm still after one of those RasterOps cards too, they're far less common than the Thunder/24. If you track down a DSP card for the SuperMac, the ones marked 'Image Processing Accelerator' run their two DSP16As at 64MHz and the 'GX' branded ones are run at 80MHz.
  4. jeremywork

    Both can accept DSP daughterboards (pretty sure the RasterOps would be identified as a Horizon...

    Both can accept DSP daughterboards (pretty sure the RasterOps would be identified as a Horizon 24 if populated.) The GWorld RAM is unique to these and the 8•24 GC, and compatible sticks are hard to find for these! If you have a moment to take closeups of the RAM chips I'd be thankful :)
  5. jeremywork

    I've heard rumors of the RasterOps being legendary though I haven't been able to find any...

    I've heard rumors of the RasterOps being legendary though I haven't been able to find any performance data or even resolution capabilities beyond the RasterOps matrix on Gamba's site, which indicates it's at least good for 1152x870@24-bit.
  6. jeremywork

    Looks like a RasterOps PaintBoard Pro and a SuperMac Thunder/24, both very strong options. As...

    Looks like a RasterOps PaintBoard Pro and a SuperMac Thunder/24, both very strong options. As DSP capable cards go, the SuperMac isn't as fast as the later Thunder II or Radius Thunder IV but is still very quick.
  7. jeremywork

    Best Quicksilver Graphics Card?

    The Radeon 9000 Pro is going to be the most commonly available G4-ADC 9/X accelerated card. There's also the Geforce4 Ti4600 which has G4-ADC, very quick acceleration in 9, but only emulates Quartz Extreme in OSX (so isn't a great choice there despite strong numbers.) It's also noted to have a...
  8. jeremywork

    How many floppy drives can a SWIM chip control? (just curious)

    Looks like the SE uses an additional GLU chip to control both internal drives on /ENBL1 (assume the portable does the same,) still only two /ENBL lines on the IWM itself. ⌘⇧1 - Eject Drive 1 ⌘⇧2 - Eject Drive 2 ⌘⇧0 - Eject Drive 3 ~need to test this but if memory serves...
  9. jeremywork

    How many floppy drives can a SWIM chip control? (just curious)

    Thanks for this tidbit, I had assumed it was a high quality homebrew job but it makes more sense to be one of the AE units. There's no identifying information on it though, so I may never have found out. It seems they cut into a II/IIx/IIfx blank to fit the connector... A mod to make it fit...
  10. jeremywork

    How many floppy drives can a SWIM chip control? (just curious)

    My recollection is rusty, but I had thought the Macintosh implementation of IWM/SWIM only allows for one drive per port, which is why the daisy chain port on external drives is often plugged with a plastic cover. Apple IIs IWM could use the daisy chain feature for up to two 5.25 and two 3.5"...
  11. jeremywork

    Who has a iMac G3 with either a Sonnet Harmoni processor upgrade and or a item that uses the Mezzanine slot?

    I haven't grabbed a Rev A/B, but I have stored pictures away as the auctions have gone by. Here's what I've seen: --- First, there's the Griffin iPort, which uses the physical slot opening but not actually the mezzanine interface. The PCB runs cables to the standard 8-pin mini-din serial...
  12. jeremywork

    The Great Gazelle PCI Hack Thread, Part 2

    Well I'm confused... could've sworn I hit 'post' over on the eBay finds thread tab I had open, but when I went checking that thread today I found the post was here instead. Sorry about that!
  13. jeremywork

    The Great Gazelle PCI Hack Thread, Part 2

    Haven't seen one of these before... "486 Module" from Reply Corp in 1991 - could be another prototype to the DOS cards that Apple/Reply first built. $200 BIN or offer. If I knew more about how it works I might bite... ;) https://www.ebay.com/itm/184945310628
  14. jeremywork

    Benchmarking Mac II NuBus Networking (A/ROSE, OpenTransport)

    The biggest advantage I've found when using the A/ROSE card is that its host system will respond nearly as quickly under load as it will when idle. Practically, this only matters when I'm connected to the A/ROSE "server" computer from a different "remote" Mac and transferring files using the...
  15. jeremywork

    6360/6400/6500 L2 Cache modules

    still had this one in my desktop clutter... 🙃
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