Unknown Mega ST blitter ?

[exxos]

This one just sparked my interest because I just happened to see this post on Facebook..

Some others notice that the CPU is soldered down and a lot of chips are now in sockets which they are not ordinarily.. I notice there is no blitter patch..

The guy said "the box has blitter upgraded sticker on it"

I asked for a closeup above the blitter, not sure I recognised the brand ? But a little odd as it is actually stamped 1987. When normally they are like 8908. Normally ST / National brands IIRC in general. Maybe IMP not sure ?

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539951182_1388616228871098_7804490865689584823_n.jpg

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Just thought it was slightly interesting enough to document it..

[alexh]

That part number is discussed a few times on an ijor thread over on Atari-forum

That's the Signetics/Thompson logo

[exxos]

That's the Signetics/Thompson logo

Cool thanks. Honestly can't remember seeing it before or not anymore.

[czietz]

Sorry to nitpick, but there never has been such a thing as "Signetics Thompson". STMicroelectronics used to be SGS-Thomson.

The logo is actually the one of "IST", a subsidiary of SGS. Apparently, that subsidiary was not too successful, because shortly afterwards the Blitters were made with the "ST" logo of the newly merged parent company.

ist.png

[DoG]

I know it looked familiar. I reponded to that thread as well on FB. Every chip in a socket... highly unusual.