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General Category => Other retro => Classifieds => Topic started by: GUNHED on 15:47, 27 February 18

Title: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: GUNHED on 15:47, 27 February 18
For CPC464 users only:

64 KB RAM for CPC464:
https://www.ebay.de/itm/263521321416?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

Extended DDI-1 Controller for CPC464:
http://www.ebay.de/itm/263521347245?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: Vyper68 on 07:49, 28 February 18
Thanks for the Heads-Up - will see how it goes.  :)
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: Chinnery on 09:32, 28 February 18
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Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: tjohnson on 09:46, 28 February 18
why are there so many wires on the DDI?  Is that normal?
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: Bryce on 10:36, 28 February 18
Nope, he's done a load of mods to it.

Bryce.
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: Vyper68 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.
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: GUNHED on 23:40, 01 March 18
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.
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: IanS on 01:10, 03 March 18
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.
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: Bryce on 12:44, 03 March 18
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.

Gesendet von meinem Motorola DynaTAC 8000x mit Tapatalk

Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: GUNHED on 17:55, 03 March 18
Why should somebody do that?
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: Bryce on 09:34, 05 March 18
Why should somebody do that?

Because they want it in its original state?

Bryce.
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: dragon 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.
Title: Re: For Sale: 64 KB RAM expansion and pimped DDI-1 Controller
Post by: GUNHED 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.  :)