Another unknown A500 turboboard ! Anybody knows what is it ??

[Effy]

I have the option to buy it for 40 Euro. It´s supposed to be an A500 turboboard but there doesn´t seem to be any name on it. Does it look familiar to anybody  :-?

EDIT : the info I have is : ST68020, date: Jan 88, PCS.L 922 0388 LS, processor: MC68020RC16E, co-processor: MC68882RC25A

[x56h34]

CSA MegaMigetRacer?

[Ohforf]

The Mega Midget Racer is a big 68030 Board.
The Midget Racer looks similar, but it's not the same.

[humppa]

First I thought that this would be a Harms board. But it looks a bit different. Maybe a different revision?

Is the 68000 desoldered from the board or what is this mess on the PCB about?

[adolescent]

It's not an Amiga board, it's for the Atari ST.  (Since it plugs into the 68000 socket, it might work though)

[alexh]

Didnt most ST's have SQUARE 68000's?

[Effy]

Good question, didn´t think of Atari yet. Does anybody know of a site like our Big Book but then for Atari
I have sent the seller a mail to ask whether the bottom side has a connector for an 68000 of the A500 or a square thing like you say the Atari has ...

EDIT : got quick mail back : 2 rows of 32 pins  :-)

[jlariv8957]

Woaouh !
seems to be handmade.
As far as i can remember there were a free hardware project round 1988 to build an accelerator card for A1000 witch plugs into 68k socket and used a 68020/14mhz processor. the schemas were available but it was far complicated for me so i never build it.
It could be that one !

[adolescent]

alexh wrote:
Didnt most ST's have SQUARE 68000's?

Not that I've seen.  The 520, 1040, Mega ST1, etc. all had standard DIP chips.  (The TT and Falcon used 030 chips so they were square...)  

[tomekm]

i'm not an expert for Classic Macs, but it might be possible that it is a Classic 68000 Mac turbo boosting it to the level of 32bits :-D , AFAIK most 68000 macs had the DIP socket.

[Effy]

So there seem to be three options. One is that this is an experimental self made board and the other is that it may be a Mac card and the last one suggests it´s an Atari ST card ... makes it pretty complicated, not  :-?

[alenppc]

Although that board looks really cool, I wouldn't expect a huge performance increase (if any at all) because the board does not appear to host any sort of RAM, therefore a 68020 working with 16-bit RAM is hardly any faster than a 68000...

I definitely wouldn't spend 40 euros on it, maybe 5.

[shaf]

Hello,

It's definately not the A1000 Accelerator created by Anakin Research called the Lucas beaucse I don't see the PALs or the socket for the Memory Expansions Board, the board is L shaped.

Shaf

 

[huronking]

Curiously enough there are no xtal oscillators on the board, even though the '020 and the '882 are different speeds (16mhz/25mhz). And the lack of a fast ram header
kinda hints that it isnt amiga. No SCSI dma hack, no
ROM socket... My vote is for the Atari ST. But the
68000 family was embedded in tons of other things too, although very few would have benefited from an accelerator with an '882.

That CMOS sticker sorta hints at an industrial use, though.

In other words I have been no help at all. Except to my post count.

[Effy]

Your post have not clarified what it really is but you all do seem to know a lot about hardware. I can only say that this board is supposed to fit in an A500 68000 processor and that the seller sells other Amiga hardware too. THIS is the seller´s link on Marktplaats.NL and THIS is the auction for this board so maybe you can see something that I have overlooked  :-o