Free to a good home.
I'd much prefer the above goes to someone who will USE IT and not flog it on Ebay in a month or stick it in a drawer.
The case has yellowed but the interface was working fine when removed from my PCW and placed in a sealed bag 20+ years ago. I expect that it is working OK now but can't guarantee that.
This offer is not limited to the UK.
Is this still available? If be interested in reverse engineering it and making the schematics available for future generations of collectors. It doesn't matter whether it works or not, as long as I can tell what kind of chip it was and its still possible to find.
Thanks
David
Please PM your address.
The schematics are already available... It uses a Z80DART and Intel 8253. This is my first attempt with a MAX222 to handle the RS232 voltages rather than the Amstrad circuit.
..and here's the board layout..
I would have gone into production but there was zero interest.
Quote from: JonB on 14:50, 07 June 22..and here's the board layout.
I would have gone into production but there was zero interest.
Sorry Jon, I meant to post earlier and thank you for posting this - it too will come in very helpful. It's always a challenge when you put a lot of work into something and it doesn't lead anywhere, but having a schematic and a basic board layout will also help.
I tend to make a lot of single-sided boards, so people can make them at home. It can be a challenge to make a complex computer board in a single side, but that's part of the fun :)
I did respond earlier, but must not have hit post, so still wanted to take the time to thank you for posting the schematics.
David
You'll be glad to know it was boxed up yesterday and will be posted tomorrow :)
Quote from: cj7hawk on 12:51, 16 June 22Quote from: JonB on 14:50, 07 June 22..and here's the board layout.
I would have gone into production but there was zero interest.
Sorry Jon, I meant to post earlier and thank you for posting this - it too will come in very helpful. It's always a challenge when you put a lot of work into something and it doesn't lead anywhere, but having a schematic and a basic board layout will also help.
I tend to make a lot of single-sided boards, so people can make them at home. It can be a challenge to make a complex computer board in a single side, but that's part of the fun :)
I did respond earlier, but must not have hit post, so still wanted to take the time to thank you for posting the schematics.
David
A single sided board for this would be proper challenging methinks!
Quote from: ComSoft6128 on 14:38, 15 May 22I'd much prefer the above goes to someone who will USE IT and not flog it on Ebay in a month or stick it in a drawer.
I feel you so much! And you're so right! When selling the last 20 units of LambdaSpeak some went into drawers, that's just wasted. :( Expansions shall be used. :)
Use, it will definitely see, though not heavy use as I use my Amstrads for Pleasure rather than Work.
And they have this smell, most likely from the monitor's capacitors since I still need to chance some of them, that just takes me right back to the 80s, and that high pitched sound that tells me it's on even when I can't see the light.
David
Quote from: JonB on 14:50, 07 June 22..and here's the board layout..
I would have gone into production but there was zero interest.
Sorry to necropost...
Just looking to make something like this and was wondering if you had gerber files lying around or other format that can be uploaded to a pcb fab?
I use kicad so can provide files for that. You can get Berber's of course, but IIRC the serial port might not be wired properly. I always got those wrong... annoyingly.. because there are 2 standards when looking at IDC-DB9 ribbon cables intended for PCs (which I was going to use).
Quote from: JonB on 22:01, 22 November 24I use kicad so can provide files for that. You can get Berber's of course, but IIRC the serial port might not be wired properly. I always got those wrong... annoyingly.. because there are 2 standards when looking at IDC-DB9 ribbon cables intended for PCs (which I was going to use).
If you didn't mind, that'd be great