The 1MB iRAM internal RAM expansion for the CPC 6128 is finally finished and working.
It will be released on Github later this year.
Unlike the iRAM 640 it requires the SRAMs to be in SMD format, but they are quite easy to solder so it should still be DIY friendly
The very first expansion that I have built for documentation and testing purposes (basically the item #1) is now available on Ebay (starting at 1€) and I will ship to anywhere in the EU.

As promised, the internal 1MB RAM expansion iRAM/1024 for the CPC 464 and 664 is in development. The (hopefully) final prototype is in test now and so far everything works.
It gives you up to 1MB of total RAM and supports C3 mode (needed for some 6128 specific applications, games and demos like CP/M plus, Future OS or PacMan emulator).
As with the iRAM/640 for the 6128, it will be pure plug&play. Open the CPC, remove the CPU and put it into the socket on the iRAM. Then place the iRAM into the CPU socket on the motherboard. And voilà, enjoy up to 1MB of total RAM.
It will be still a few more weeks until the tests are finished. Once this is done it will be released on GitHub (for DIY projects) - and probably you can find it sooner or later on Ebay.

Quand on accumule les extensions cela peut être pratique. Surtout quand on possède plusieurs claviers, en avoir un boosté de la sorte pourquoi pas. Un 664 peut monter jusqu'à combien en RAM ?

New internal 1024KB RAM expansion iRAM/1024 coming to the CPC 464/664 at the end of summer
The PCB has been refactored now so it will fit into all variants of the 464 and 664.
Full 6128 compatibility incl. C3 banking so FutureOS, CP/M plus and 6128 demos/games can properly work.
It's awesome to see a CPC 464 running SymbOS with a full 1MB of RAM being available
As usual it's DIY friendly, so all easy available, cheap through-hole components with long-term availability.
It will also be possible to build a 576K version (1 SRAM only, no C3 support) or a 640K version (second SRAM is 128K instead of 512K) with the same PCB and logic ICs.
There will be a few more weeks of testing before it will be officially released on Github but I'm very confident that everything works now.

Rien n'est prévu pour CPC+ ?

I just released the iRAM/1024 for the CPC 464 and 664 on Github - so now everyone can also upgrade those models to a whopping 1024K / 1MB internally.

• DIY friendly, all cheap through-hole components with long-term availability
• Fully internal plug & play, no internal soldering required
• (probably) fits all models of the 664 and 464 (*)
• maximum 6128 compatibility (supports C3 paging - required for some 6128 demos and games)
• can be used in parallel to external expansions with RAM built-in like the ULIFAC or DDI5 (has priority over them - so not additional)

(*) for 464 mainbord rev 3 with GateArray 40007 the heat sink needs to be bent - and the 464 rev 4 (cost down) has not been tested as I don't own that model and could not source it .

I don't offer them for sale except for the few I already sold on Ebay to cover development costs. It's fully DIY - so if you know how to solder you will find everything on Github: https://github.com/etomuc/CPC464-iRAM1024

(or wait until commercial sellers will pick it up)

It won't fit into the CPC 6128 due to its size and is not compatible with the Plus models. Please don't even try it in a Plus. (For a Plus compatible memory expansion check out the Gemini by PulkoMandy)