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
Thanks for the Heads-Up - will see how it goes. :)
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why are there so many wires on the DDI? Is that normal?
Nope, he's done a load of mods to it.
Bryce.
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.
Quote from: Bryce on 09:36, 28 February 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.
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.
Quote from: IanS on 00:10, 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.
10 minutes to rip it all back out :)
Bryce.
Gesendet von meinem Motorola DynaTAC 8000x mit Tapatalk
Why should somebody do that?
Quote from: GUNHED on 16:55, 03 March 18
Why should somebody do that?
Because they want it in its original state?
Bryce.
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.
Quote from: Bryce on 08:34, 05 March 18
Because they want it in its original state?
Bryce.
Oh, then it's way better to buy the unmodded of course. :)