STF installation of dual TOS card with decoder and 2 chip relocation

Upgrade or replace the ROM.
gigi92
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STF installation of dual TOS card with decoder and 2 chip relocation

Post by gigi92 »

Hello I have an ATARI STF and I ordered the dual TOS card [0245] with the decoder [0248].I intend to install with the procedure 2 CHIP RELOCATION C070789. I have a doubt about the connection: CE SELECT must be soldered on aux and at Pin 8 is on the 74LS11 IC or on The white wire on the bottom left of the decoder, both? It's not clear to me. Is it possible to tell me the exact connection in this case ?
Thanks in advance
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exxos
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by exxos »

CE SELECT has 2 options.

GLUE decoding where it will only work with TOS102/104 for example.

AUX is linked to the decoder board for the new TOS206 decoding to work.

There is a relocation for that dualtOS board also, which I assume is where your stuck at ? But if you using the decoder board, then you don't need to worry about the LS11 anyway.

So assuming your doing this..

IMG_0439.jpg

That white wire goes to the decoder board and not the LS11, assuming your using a 104/206 ROM.
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gigi92
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by gigi92 »

Thank you for this very quick feedback, Yes I will use the TOS 1.04/2.06. It's clear now I plug everything in as in the photo except for the white wire that I connect to the decoder. The GLU on which I have to connect the decoder on this card is the U56?
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exxos
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by exxos »

gigi92 wrote: 14 May 2024 12:30 The GLU on which I have to connect the decoder on this card is the U56?
No, its the other PLCC chip towards the right of the motherboard.
gigi92
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by gigi92 »

So this one ? i put décoder on it ?
20180325_133850 (1).jpg
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exxos
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by exxos »

gigi92 wrote: 14 May 2024 13:35 So this one ? i put décoder on it ?

Image
I'm afraid hotlinking isn't allowed on the forum you need to upload the image as attachments properly.
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exxos
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by exxos »

gigi92 wrote: 14 May 2024 13:35 So this one ? i put décoder on it ?

20180325_133850 (1).jpg
Yes.
gigi92
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by gigi92 »

Thanks I'm also going to mount STFM 4MB RAM EXPANSION [0020], but there is more work there... I'll take pictures,
gigi92
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by gigi92 »

Here we are, I'm a little afraid of twisting the pins, let's thumb up and that's it?
IMG_20240518_083647.jpg
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exxos
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Re: STF installation of dual TOS card with decoder and 2 chip relocation

Post by exxos »

As long as pin1 is correct then your good to go. Don't forget it needs a wire to the dual tos board.

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