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I've always wondered why an alternative utility, SystemSwitcher, has never been very popular.

The 40MHz variant for the Mac II was for sale last year on Yahoo Japan. Judging by the photos, it seems this version came with some kind of module designed to replace the HMMU/PMMU, and obviously the connector to plug into the 68020 socket. Seller also included SWIM and ROM upgrade. Funny...

@Oliver_A I am following your project with interest, but I am remaining silent as I have no relevant technical knowledge in this area. That said, you did not specify where in the world you live. Depending on that, the community could potentially organize to lend you one or another Mac Quadra...

Some have chosen to convert to ATX. Jmacz posted about this last week. See here.

Here maybe ? : https://macintoshgarden.org/apps/system-6-collection

Well, it was that simple. With the aforementioned modification to the System file, the Gestalt ID returned by the machine is ‘99’, which corresponds to the LC 580. And the Soft475 extension doesn't accept this, quite logically. However, it is possible to work around the issue via Wish-I-Were by...

For some unknown reason, the Soft475 extension doesn't work on my CC Mystic. It is crossed out in red during start-up, as if it didn't recognize the machine. The control strip doesn't work either. My Mystic doesn't have the VGA mod and boots with patched systems (gestalt 99 edited from 21 to 10...

@thisisamigaspeaking , do you mind posting pictures of your DayStar board ?

I've finally found it: Daystar Powercard 030, IIx variant. https://archive.org/details/TNM_DayStar_Digital_Domestic_Price_List_various_c_20170901_0029/page/n3/mode/2up

Thank you guys.

Any brand you'd recommend ?

I see, thanks for the explanation.

Sorry for the topic hijack, but given that there have been recent attempts to design 30-pin* SIMMs using voltage converters to accommodate EDO DIMM chips, could this approach be transposed to a new design for 64-pin SIMM? *https://github.com/rigred/SIMMBA-16

Funny story indeed. Incidentally, the IIcx in which I found this card was also collected 20 years ago.

Very happy to count one of Vette's developers among us ! Vette was the first game I bought (Xmas 1991), a week after my Mac Classic... And my first encounter with a system error too :LOL:

Some X800 GTO cards and the X800 GTO² variant were unlockable to X850 XT. See: https://www.techpowerup.com/articles/overclocking/vidcard/127

I think I remember reading here or on another forum that some people had removed a resistor on this kind of adapter, which made things much more reliable. The problem is that in this case you'll lose the warranty...

It was a very popular manga/anime among the French-speaking population of Europe in the early 90s. Not as popular as Dragon Ball or Saint Seiya though.

It would be worthwhile trying a data recovery on the IIcx disk. With a bit of luck, the software might still be there. As for the AS/400, I'll gladly leave that to others :). Microcomputers already take up enough space :ROFLMAO:

Wow, you guys found out very quickly what this card is. Thanks. I can see that the SE PDS variant was mentioned here. Just like you say, Melkhior: pretty useless without software and the minicomputer.