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The tricky part in finding the part is finding a '705 with enough RAM. The e1 has 368 bytes of RAM. Most of the other variants have 176 or similarly small amounts.

What affect will this software have on a machine which has had the 33 MHz resistor move modification? Do the resistors need to go back to their original positions? Edit: Never mind. Found the answer here...

Ten years ago, my efforts to reproduce. Unfortunately, the thread where Wally reported the inductance range is long gone. I want to say 0 - 44 uH, but I don't think that's right. https://68kmla.org/bb/index.php?threads/anyone-have-a-dead-l2-adjustable-inductor.27941/#post-294686

Yep, that's the one I have. I just really love having the stripper conveniently stored in the handle...

Wire wrap may be alive an well, but my favored tool came from Radio Shack, and they're long gone -- I think. Haven't checked for a lingering on-line presence in a while.

I treasure my wire wrap tool, as I'm not sure I could find a replacement...

That is my understanding as well. Except I don't think there's any need for coordination between the busses. If a PCI device wants to access RAM, e.g. and the relevant Bandit doesn't have control of the CPU bus, I assume the Bandit would just stall the transaction until it's ready to bridge...

Well in the thread with the 9600 schematic (and 6500 schematic) that joevt referenced above, I posted my thoughts. I concluded that you can probably just solder the chips I have in place of the existing chips, (matching pinouts) but the question is then exactly what you asked. How does the...

Okay, I looked at it. The differences are minimal. Bandit 1 has a GNT/REQ line connected to Grand Central and Bandit 2 does not. Which makes sense. You don't want to put Grand Central or any other PCI device on two different PCI busses. Pins for Bandit on Arbiter 1 are connected to...

Sorry for hijacking the thread. We now return you to the regular topic....

ClassicHasClass answered that better than I could have. Yes, it has OF. That's a little disappointing, although at this point in time, a solution for the S900 is more of a white whale than a real need. :) Still, it's very puzzling. Architecturally, the S900 is like a PM9500 with the...

I wonder if they did that so that it would be easier to use the same ROM on all those machines. If it's at F0, it's video circuitry. If it's at F4 its more PCI slots. It would be interesting to get the Mac OS running on the ANS. However, two of the PCI devices on that six "slot" Bandit...

As far as I know, Apple never used more than 2 bridges. The ANS has two Bandit PCI bridges, similar to the PM9500. On the 7500/7600/8500/8600 the video circuitry is the 2nd bridge and the first one is a Bandit PCI controller. The Apple Hardware Developer Note for the ANS goes into a small...

Back in the 90s, The University of Texas at Austin held a surplus property auction three or four times a year at a warehouse at the Pickle Research Center. That's probably where Jag was seeing pallets of Macs. I bought 15 pre-Plus Macs at some point for some small sum. Probably under $100...

For chip programming I like to keep an old Dell 'D' or 'E' series laptop handy. Being a laptop, they don't take up much room, and the D and E docking stations are available with a parallel port which is nice for the really old programmers. I guess not much need for the P port with a new...

No, I never did the experiment. I'm great at posing questions, but less so at making answers. Projects backed up to the year 3000...

IIRC, AV70-1 is a ICS chip. full part number is AV9170-01CS08. It's a clock delay or clock synchronization chip. ICS = Integrated Circuit Systems IIRC, the chip takes a clock input and outputs the same clock, except.... It also takes a second clock input and it aligns the phase of the...

I was browsing the items from Memory Master and they have a bunch of the PM6100/7100 ROM modules for about $13. https://www.ebay.com/itm/175602575946?epid=1228687524 Posting in case there are folks with a machine where the ROM was pulled. That's the 341-0741. I think it will also work in...

I've used SoftRAID with the VST UltraTek/66 (ATA-66) which used Firmtek firmware (same as Sonnet's cards) and I've also used it with the Acard AEC-6280M, (Acard firmware) which is an ATA-133 card. Another option is to get an Acard AEC-6880M which is a hardware RAID (0, 1) ATA-133 card. I...

It's (the PS) is probably a one layer board. I would trace out a schematic and from that it should become fairly obvious what role that component was playing. Power supplies are not all that complicated. I'm a little curious about calling D1 a *bridge* rectifier. A bridge rectifier...