Author Topic: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller  (Read 2353 times)

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Offline GUNHED

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Offline Vyper68

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #1 on: 07:49, 28 February 18 »
Thanks for the Heads-Up - will see how it goes.  :)
Paul Woakes - Genius & Programmer

Thank you for Mercenary Paul

Offline Chinnery

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #2 on: 09:32, 28 February 18 »
-
« Last Edit: 10:37, 28 February 18 by Chinnery »

Offline tjohnson

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #3 on: 09:46, 28 February 18 »
why are there so many wires on the DDI?  Is that normal?

Offline Bryce

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #4 on: 10:36, 28 February 18 »
Nope, he's done a load of mods to it.

Bryce.

Offline Vyper68

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #5 on: 12:22, 28 February 18 »
I am only interested in and have bid on the RAM expansion so anyone fancying the DDI-1 help yourself - but i have been waiting for a memory expansion to come along for my 464 for a long time so i hope i win it.
Paul Woakes - Genius & Programmer

Thank you for Mercenary Paul

Offline GUNHED

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Nope, he's done a load of mods to it.

Bryce.


Yes, that DDI-1 controller is somehow a mystery: Drive connector changed, more chips added (chip on back of a chip), DOS replaced. Maybe converted for a DS, 80 track drive? God knows. It's somebody who is firm in hardware. But since I gave up all my 464's - this one can go too.
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Offline IanS

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The modified DDI-1 just looks to be expanding the number of Roms.
Similar to what I did - http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/parados-for-464-users-with-ddi-1-drive/msg48341/#msg48341

The ROM is much bigger, so it's probably latching more bits (I only latched 2 bits to to get 4 roms), my guess is that it's 8 or 16 roms within that big eprom.

Probably using something like a 74ls174 (the extra chip in the lower left) to latch up to 6 bits.

Offline Bryce

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The modified DDI-1 just looks to be expanding the number of Roms.
Similar to what I did - http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/parados-for-464-users-with-ddi-1-drive/msg48341/#msg48341

The ROM is much bigger, so it's probably latching more bits (I only latched 2 bits to to get 4 roms), my guess is that it's 8 or 16 roms within that big eprom.

Probably using something like a 74ls174 (the extra chip in the lower left) to latch up to 6 bits.
10 minutes to rip it all back out :)

Bryce.

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Offline GUNHED

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Why should somebody do that?
http://futureos.de --> Get the revolutionary FutureOS (Update: 2021.01.24)
http://futureos.cpc-live.com/files/LambdaSpeak_RSX_by_TFM.zip --> Get the RSX-ROM for LambdaSpeak :-) (Updated: 2021.07.15)

Offline Bryce

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #10 on: 09:34, 05 March 18 »
Why should somebody do that?

Because they want it in its original state?

Bryce.

Offline dragon

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #11 on: 19:02, 05 March 18 »
I don't have a dd-1, so if is cheap i go for it.  If modify don't like me i cut all wires XD.

Offline GUNHED

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Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
« Reply #12 on: 12:38, 06 March 18 »
Because they want it in its original state?

Bryce.


Oh, then it's way better to buy the unmodded of course.  :)
« Last Edit: 12:39, 06 March 18 by GUNHED »
http://futureos.de --> Get the revolutionary FutureOS (Update: 2021.01.24)
http://futureos.cpc-live.com/files/LambdaSpeak_RSX_by_TFM.zip --> Get the RSX-ROM for LambdaSpeak :-) (Updated: 2021.07.15)