iRAM/640 - Ram Expansion - public repository

dodogildo · 08:36, 28 February 25

Amazing work. I have some PCBs on order. @eto, is there any chance you can create a part list on Mouser and add to the repository? That'd help us less experienced a lot.

eto · 11:36, 28 February 25

I tried my best to find the components on Mouser and updated the Github page. I am not sure that these are really the right components as I am not really familiar with all the different meanings of the specs, so there is a slight chance this is not perfectly right.

I added a request to the page that if someone figures out all the items that they would please share the list.

Egg Master · 19:00, 28 February 25

If the two PAL are aligned with the CPU, may be it is possible to socket them too?

eto · 19:35, 28 February 25

Quote from: Egg Master on 19:00, 28 February 25If the two PAL are aligned with the CPU, may be it is possible to socket them too?

You can socket PAL1 but PAL2 will (probably) clash with the keyboard if you are adding a socket. There is just not enough space in the 6128 to socket them both.

I'm actually happy that it worked out to use a socket for the CPU.

d_kef · 19:55, 05 March 25

Quote from: Rabs on 15:35, 21 February 25Need a nice badge for the case now. My sticky label does not do it justice

You cannot view this attachment.

I think this is more suitable.
I tried to match the typeface and the colour of the original 6128 badge but the colour depends on the paper you use and I've had only plain paper available to test.

Anyway I attach here the PDF and the XCF file for anyone who wants to try it or has the ability to make a colour accurate copy.

You cannot view this attachment.
You cannot view this attachment.

d_kef

Prodatron · 21:44, 05 March 25

@d_kef / @eto , that looks so great and fits to the old style!

eto · 22:01, 05 March 25

Oh, I love it!

Quote from: d_kef on 19:55, 05 March 25Anyway I attach here the PDF and the XCF file for anyone who wants to try it or has the ability to make a colour accurate copy.

Would you mind if I add it to the repository? Or should I just add a link to the post here?

d_kef · 22:23, 05 March 25

Quote from: eto on 22:01, 05 March 25Oh, I love it!

Quote from: d_kef on 19:55, 05 March 25Anyway I attach here the PDF and the XCF file for anyone who wants to try it or has the ability to make a colour accurate copy.
Would you mind if I add it to the repository? Or should I just add a link to the post here?

Of course you can add it to the repository!
I'm glad you like it.

d_kef

Prodatron · 22:41, 12 March 25

The new version for the 464/664 works fantastic so far:

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I have to do some more tests but also use the opportunity to fix some things in my 664

Thanks a lot, @eto for this great hardware!

eto · 23:02, 12 March 25

Quote from: Prodatron on 22:41, 12 March 25The new version for the 464/664 works fantastic so far:

I love to see that.

(but this is the wrong thread for the 464/664 version

)

dodogildo · 19:00, 07 April 25

Here goes another one

unay · 19:27, 07 April 25

Congrats!
Very clean work and also great view.

Prodatron · 20:21, 07 April 25

Quote from: dodogildo on 19:00, 07 April 25Here goes another one

Very cool @dodogildo , glad to see people building this great project, we need more of this!

GUNHED · 12:49, 09 April 25

Quote from: Prodatron on 20:21, 07 April 25
Quote from: dodogildo on 19:00, 07 April 25Here goes another one
Very cool @dodogildo , glad to see people building this great project, we need more of this!

You could manage the creation of a batch of this great internal RAM expansions. You did that with many projects before and have the experiences for that.

GUNHED · 15:49, 11 April 25

Buy it on ebay now:
https://www.ebay.de/itm/127030209562?itmmeta=01JRJMYT875S34Z2S8QFYRWHE4&hash=item1d93972c1a:g:KpkAAOSwCm1n5rCT

unay · 13:08, 13 April 25

Quote from: Prodatron on 20:21, 07 April 25
Quote from: dodogildo on 19:00, 07 April 25Here goes another one
Very cool @dodogildo , glad to see people building this great project, we need more of this!

Another one build from @dodogildo
Thanks a lot @eto
And of course special thanks for @dodogildo Almost ten more people waiting dodogildos work in Turkey.

GUNHED · 13:12, 15 April 25

8 units more...

https://www.ebay.de/itm/127051800106

Sadly in red, I would love to see them in blue

Egg Master · 17:56, 15 April 25

Quote from: GUNHED on 13:12, 15 April 25Sadly in red, I would love to see them in blue

Red, blue, purple, black, white, ... All these colours look wrong over the green CPC mainboard.

dodogildo · 22:16, 15 April 25

Quote from: GUNHED on 13:12, 15 April 258 units more...

https://www.ebay.de/itm/127051800106

Even though they look nice, I think precision sockets are the wrong choice. It's a bit difficult to plug in and out the ICs without damaging their legs.

eto · 23:28, 15 April 25

Quote from: dodogildo on 22:16, 15 April 25I think precision sockets are the wrong choice.

I still doubt sockets are a good idea anyway (except for the CPU).

But let's see. I think Prodatron ordered one and if I am not mistaken he can report soon if the version with sockets still properly fits into a 6128.

Prodatron · 09:38, 16 April 25

Quote from: eto on 23:28, 15 April 25But let's see. I think Prodatron ordered one and if I am not mistaken he can report soon if the version with sockets still properly fits into a 6128.

I should receive it end of april. It will be interesting to see, if the metallic shield, which is used in german CPCs, still fits with the sockets.

dodogildo · 09:46, 16 April 25

Quote from: Prodatron on 09:38, 16 April 25It will be interesting to see, if the metallic shield, which is used in german CPCs, still fits with the sockets.

@unay is now using a german CPC with a fully-socketed iRAM. But I don't know if he had to modify the metallic shield or not.

Egg Master · 10:05, 16 April 25

The price on eBay is expensive, to just produce an existing design (eto's real work)... After all, the Poles have made a specialty of doing business with the retro computers interfaces for a decade. I hope that someone in the cpcwiki community will give his contribution to make it affordable.

unay · 10:32, 16 April 25

Quote from: dodogildo on 09:46, 16 April 25
Quote from: Prodatron on 09:38, 16 April 25It will be interesting to see, if the metallic shield, which is used in german CPCs, still fits with the sockets.
@unay is now using a german CPC with a fully-socketed iRAM. But I don't know if he had to modify the metallic shield or not.

I'd pull out the shield two months ago. But since i saw prodatron's comment i wonder if it fits

So i'm gonna try it to night.

eto · 13:34, 16 April 25

Quote from: Egg Master on 10:05, 16 April 25The price on eBay is expensive, to just produce an existing design (eto's real work)... After all, the Poles have made a specialty of doing business with the retro computers interfaces for a decade. I hope that someone in the cpcwiki community will give his contribution to make it affordable.

If you check out the GitHub repository then you can see that I encourage (semi-)professional resellers to build that expansion.

This guy specifically asked for permission. He's using components from reliable resellers and high quality sockets which costs of course more than if you buy everything on AliExpress. He has a (close to) professional lab where he produces everything. That expansion looks like it's done in a professional factory. I'm totally fine with him earning a few bucks per item.

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iRAM/640 - Ram Expansion - public repository