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Hi all,

 

hoping someone can help me find information on a Compo Software Ltd TAA3 board (dated 1992) that I fitted to my STe years ago.

 

I've gone through all the manuals that I have, and cannot find any paperwork for the board.

 

Find an image of the board below.

 

100200824_TAA3Board.thumb.jpg.40e75b9b7cbd3fad24783a9ca7389f7f.jpg

 

Thanks in advance for any help.

 

Regards

 

 

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Hardly TOS 2.06 upgrade board in case of STE . By STE need only to replace ROM chips, and maybe set soldering pads if chips are not with same pin count as what was in .  GAL is needed in case of ST, Mega ST, but they are all with DIL CPU .

For me it looks like accelerator board - therefore is 64 pin DIL socket - I guess that they had such chips (for better price ?)  . And ROM sockets are for modded TOS, may be even 2.06 if CPU is 68010 . And then should be connection to higher CPU clock, like 16 MHz, what should go to logic (GAL), so can use it or org. 8 Mhz for CPU. There are 3 lines at left which seem as points where to solder wires ..

Since can not find info about online, I guess this was manufactured in small quantity.

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Hi ojanhk,

 

thanks for the link, it definitely shows the board I've got. As you say the GAL is missing, and thinking long and hard about this, I believe I removed the GAL so I could run a PC emulator board, (286 I think), with this as the adaptor board.

 

Again thanks for the link. I'll look further for the manual for it.

 

Regards

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Yeah, this is T-Board. But what I said, that in case of STE no need for board stays. No need for GAL - address space for ROM TOS in STE is same as in Mega STE.

If want  TOS switch simplest and cheapest is to use larger capacity EPROMs - like 27C020 for 2 TOS versions, 27C040 for 4 TOS versions. Not theory - I did it all.

Just sad example of overcomplicating and take more space than needed in computer.

Instead manual get above mentioned EPROMs and switch .

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You are right it is over complicating on a technical side. But at the time, Atari was still fully active, so in order to sell a commercial product for Dual TOS they might have had no other choice than to provide space for 4 ROM chips, all official from Atari. That’s just a guess 

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That could be true - I remember that 2.06 was sold  in Germany for 200 DEM - only 2 EPROMs with it programmed.

But why no STE only board then ? Without that big DIL socket it would take much less space.

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