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Indeed. All three need an extension to enable the back-side cache lf the G3/G4. Only Alchemy and Gazelle need another Init to switch over from 603e to G3/G4. Running the patched MacOS X Beta on Tanzania with an installed G3 card worked after some fiddling and the cache could be initialized...

Sounds logical. The Supermac C500/600 series went the ZIF way and even incorporated an in-line cache. PowerComputing went the CPU card way. Eliminating the „start 603-switch to G3“ procedure for both Alchemy clones. Interestingly, AFAIK there has never been a Gazelle clone. But the...

I am happy to test, being located in germany, have PS/2 keyboards and a working Mac Plus.

At least Firmware wise the L2 Slot in Tanzania and Alchemy/Gazelle is different - maybe even some address routing. Something I learned when I and my colleagues developed G3 cards in the late 90s. The Tanzania can directly boot from a CPU in the L2 slot without any additional software (then of...

Maybe in target disk mode, the drive is accessed with a slower PIO or less critical UDMA33 protocol. That would at least explains it. FireWire 400 (i guess that was used for target disk mode) has a theoretical speed limit of 50mb/sec but there are many reports that it is capped at around...

UDMA cables have 80 wires (vs. 40 for IDE). However, the connector is still 40pin. Only with such a cable, the drive and controller can work out the right protocol and speed.

Are you using an IDE cable or dedicated Ultra-ATA cable?

The Quicksilver has one Ultra-ATA and one IDE connector. See attached image..….connect your HD to the Ultra-ATA for optimal speed.

And it is a fully functional gsm phone…..not just a 3D printed decoration

Not using 13w3 at all as I only have the TPD 2 card, not the display. I am trying to get it run on a Dell 22“ TFT that works quite well with all those old video signals from Toby, Futura SX etc….. I only have a 15“ Nokia Multisync Trinitron CRT, a bunch of Apple 13“/14“ and an Apple 16“ fixed...

Thanks for the valuable input. Thinking of this one from Amazon - guess it will work. Also checking for the pin outs for DB9 equipped cards like the Miro Prisma nubus graphics adapter. But sadly, DB9 was not standardized unlike DB15 Mac or VGA. The good old days when dealers/resellers and...

Interested, too

@Trash80toHP_Mini thanks for the link to your post. the mac rescue of denver was the only reference that I‘ve found as well. Let me see whether i can cheat a VGA cable to combine RGB to one.

Just optained a nice Q650 with a Toby and Radius TPD II Card. I have not found any specific info about the card. I guess, it is a 1-bit card and runs at 1152x870 as this is the standard apple two page resolution. however, I can‘t get it to run without a greenish screen. I am using the 2 row 8...

The IIfx used DMA, but AFAIK it is only used unter AU/X and not the standard Mac OS. The 1. gen PowerMac introduced DMA to the Mac OS…. (But not the PPC performas based on 68k mobo designs)

There was no public software I know of. I will check whether I still find the documentation for the CPLD that we used to program clock, bus and delay. But it may take some time. It‘s been 25 years since I worked on it.

As @trag mentioned, Hammerhead could be adjusted for bus timings and memory timings. The CPU card (JoeCARD) that I co-developed used a microcontroller to adjust multiplier, bus speed and delay. The latter means it adjusted Hammerhead‘s registers to match the requested bus speed. Other...

Right, PCI Bus (Bandit IC) and processor bus run independently and asynchronous. However, for higher bus speeds, you sometimes have to adjust bus delay. Not all CPU upgrades support that feature. In addition, lots of ram puts lots of stress or load on the memory bus. It may not be ram that fails...

Kansas used double the bus speed for the cache. Thus the cache rus at 100mhz vs. Tsunami‘s 50 Mhz. And yes, despite the FPU, the G3 was overall faster than the 604ev In real world Mac OS use.

For 60 - 66 Mhz bus speed, you needed 60 ns RAM as 70ns RAM might be too slow. I have never tried any 50ns Ram and I guess it may has not been widely used as the industry moved fast to SD RAM with 66 Mhz and above. To answer your question, the majority of tsunami testbeds were based on Umax...