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Super rare Macintosh II Daystar PDS adapter


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I came across a super rare Daystar PDS adapter for the Macintosh II.  This sucker converts an 030 + FPU into a PDS slot.

 

If I ever come across a boxed Macintosh IIx, this would be the only machine that'd replace my IIci as my regular workhorse.

 

I've never seen one of these adapters before.  Since I already have the expensive part (the Turbo 040), I figured I might as well get the adapter.  You never know. :)

 

Still on the lookout for a Daystar Turbo 040 box.  I'd like to get the box.  I have the card, manuals, disks, etc., but no box. :(

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Congrats. It is a hard thing to find. I would not mind having such an adapter but I do not have the machine to put it in. As Is, my Mac IIci is also my workhorse for it too has the 040 DayStar in it as well. Between that and my IIfx... well I'm still trying to decide which machine is the stronger of the two.

 

If I'm right, it can also work on the SE\30 if the CPU is on a socket.

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I have one in my II also. I think I put in an 030 from Daystar. Cool thing is the ability to swap card as they are found with such an adapter. Meaning the accelerator itself is specific to the II. The II card will not work on all IIs since the first run does not have a fully-pined MMU socket. It was pin-specific to the chip used. Making PMU upgrades impossible on those boards. A silent recall replaced many of them.

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The Mac II starts off with System 4 and this card (along with the Turbo040) allows the Mac II to run a 68040 chip at 40MHz.

Not at all bad for System 4, when a 16MHz 68020 was considered fast (as, no doubt it was, back in 1987).

Has anyone tried this?

Is it actually possible to run System 4 on a 40MHz 68040?

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System 4 should run, its not like the 68040 broke much more than the 68020 did with regards to software. In related fun, I know that System 7.5.5 runs like greased lightning on a 450Mhz G4 with 256MB of RAM (upgraded PM8600) :p

Except that the 040 FPU is an incomplete implementation that relies on a bit of code from Motorola supplied with the OS to emulate the rest.

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  • 2 years later...

I realize this is a thread necro, but if anyone is interested, I have one of these mythical PDS adaptors, albeit for the Macintosh II.  It is different (and maybe rarer?) than the IIx one, as it pulls data and signal from the MC68851 PMMU memory management unit as well as the MC68020 CPU to work its magic.   The card consists of a PDS slot glued to the 68020 bus via some PAL chips, and a programmable ROM (probably some boot time glue to deal with the bus signals/INTs/MMU). PM me if interested.  I'm not interested in price gouging, I'd sell it cheap. 

20181204_004118.jpg

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