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@Androda Thank you very much for your two replies. So if we look at U7 in your marked-up PCB layouts for older BSv2's, we see for example that one side of the 4.7kΩ resistor (that must be added) goes from Vcc (pin14) of U7, and the other side of that resistor goes to pins 4 (2OE) & 5 (2A)...

When clicking your link as of today, March 5th, choosing the low cost "Kit" shows OUT OF STOCK. Can we buy just the 3D printed Mounting Bracket from you? If so, how do we proceed with ordering that bracket-only? If we cannot buy only the mounting bracket from you, could you please provide a...

While waiting for the answer about the resistors (see my previous 2 posts -- sorry, but I am persistent when it comes to seeking important replies), I would like to inquire about the Androda/TechKnight RAM card because the quote above mentions only 7MB of RAM. I recently acquired a Backlit...

Works with the SE/30 too, thanks to Newton Keyboard Enabler.

Well, it seems like no one yet knows. But when someone does know, I look forward to hearing that info. Thank you!

Thank you for your kind willingness to check, Bruce!

Thank you for the feedback, @KennyPowers . Interestingly enough, the only graphics card incompatibility information I could find, pertaining to the Radius Rocket, had to do with RasterOps video cards. Keyword search the article below for “rasterops”...

I did more testing today. When Spicy O'Clock is set to 43.2MHz, all is well in terms of OS booting and Snooper 2.0 operation. Not only does Snooper 2 launch without freezing, but using my Serial Loopback Plugs, Snooper gives an OK to Printer and Modem testing. When I move the jumper on Spicy...

@Mr. Fahrenheit Thank you for sharing those details. This person appears to be a “mail fraud” criminal feeding off our good natured community. It upsets me his YouTube channel is still up, as that serves to give him some level of legitimacy in the minds of uninformed people who haven’t seen the...

On a somewhat different yet related note, having the two cards installed in a IIci is pushing the limits of the NuBus power allotment. IIci Technical Reference info: So +5V @6A for all 3 slots. Power requirements of the Thunder 24/GT video card shown to be +5V @2.2A: Power requirements of...

@slomacuser Thank you for your kindness. Unfortunately, that was one of the links I had Googled up prior to writing my opening post. The relevant pages on that site are these: Rocket Q&A https://machut.net/mirrors/radius.vintagebox.de/RadiusQA/Rockets.html Thunder 24/GT Q&A...

Would any of you know where I can find a video card compatibility list for the Radius Rocket? More specifically, I am curious if the Radius Thunder 24/GT NuBus graphics card can be installed at the same time as a Rocket in a Mac IIci. I know the Thunder 24/GT works fine alone because I have...

Thank you for bringing this to our attention, Ron.

And one more thing... Although System 7.1 and 7.5.5 boot fine at 48MHz, System 7.6.1 and OS 8.1 freeze during the boot sequence, even before any icons display. This is consistent with what I've seen in the past at high clock speeds. Reducing the clock speed down to 43.2MHz makes them boot...

As you can see from the scope tests below, the higher the CPU clock speed, the lower the voltage across resistor R80, dropping from 3.2Vp-p at the stock clock of 33MHz, down to 2.85Vp-p at 48MHz (via Spicy O'Clock). My scope is a Rigol DHO804 hacked to enable 100MHz bandwidth, with 150MHz rated...

Friends, fellow forum member @MICHAENTOSH passed away suddenly and unexpectedly on Feb. 16th. I did not know him a long time, but grew to know him rather well in 2023 and considered him a friend. He was a very kind person and quite knowledgeable about Macs. His passing was a tremendous shock to...

Measuring is difficult to impossible without soldering long wires to the points to be measured, due to the fact the motherboard must be inserted into the Color Classic in order to be powered. Also, the high frequency signals we are talking about are twice the base CPU clock speed, so 80MHz for...

For people with 2023.08 BlueSCSIv2 designs (see attached PDF schematic) which resistors need to be changed, and to what values, to avoid trouble when used on a 5120 or 5126 Macintosh Portable?

If we ignore the RAM card slowdown issues mentioned earlier in this thread and just focus on what you are describing when BlueSCSI v2 is used, what is the end result in terms of how BSv2 operates with the Portable? Does this cause BSv2 to lockup? Noticeably slow down? Or does it seem to operate...

Well, I did further testing this evening, at the stock clock speed of 33MHz with the 8MB universal ROM SIMM that @Jockelill helped to create, and I provided him some feedback. (Basically, it works to kill the painfully slow RAM checking at cold boot, but booting from ROM still has bugs that...