I'm certainly glad my RAM board is seemingly working, I really appreciate the help and interest - thank you!
On the subject of Eric's RAMTest program (thank you) I did let it run it's course and it reported everything as good, including my VRAM which is good to know. Dare I say a very nice bit of software - not only does it do the job but the results couldn't be more plain and I appreciate a bit of code that keeps you informed as to what it's doing.
The CP/M RAM test I used claims to be 2.2. It's one of the two attached, I'll need to see which one I put on my SD card.
On the subject of production and all that goes with it I hope I'm not about to cause disappointment, some encouragement:
-I went for 1mb as that was doable for my current skill level. But I believe the ADAM can support truly silly amounts of RAM so maybe some time I'll shoot for the maximum... because
-It's generally not my intention to make for sale the stuff I come up with. Partly because I'm in it for the fun of designing the parts but also because my projects often rely on the generosity of people with existing commercial interests - I don't want to get a reputation for repaying kindness with competition...
Having said that I'll occasionally sell spare boards or fully made-up devices on eBay to help fund my habit and I am happy do discuss individual requests for constructed boards, but I'm not keen to find myself with a kitchen-table production run on my hands.
-Unless (very rarely) stated otherwise I'm completely happy for others to whatever they want with my projects. That includes making and selling, although I'd appreciate being credited for the design.
-I try to post full details on everything I've done by way of a thank you and contribution - I do remember it took me a long time just to get round to using a soldering iron for anything more than repairs and even longer before I took the plunge with designing my own boards: Eagle is frankly a total SOB to learn, but I stuck with it because it's the de-facto standard. But here's the good news:
If you have a .zip file containing the Gerber files for a board you're interested in getting boards made is actually really easy and reasonably cheap. To go through the process I use with Seeed:
-Upload the Gerber .zip file
-Fill in the board dimensions (my gerbers zips usually have that as part of the file name but Seeed will often fill that in for you or there's a useful proggie called Gerber Logix)
-Decide how may boards you want (I tend to go for 5-10 depending on how the numbers work as most of the cost usually comes down to shipping so why not have spares)
-Leave everything else on the defaults and place your order. About 7-14 days a nice little package will arrive.
There's plenty of fab houses out there, OSHPark is very popular, but I'd advise whichever one you go for google what other's have said:
-Some fab houses make some pretty cr*p boards
-A lot of fab houses aren't set up for hobbyists and are either a pain to deal with or are really expensive for small runs
Once again thank you all for your help and interest, I really appreciate it. Two down (Game pad and Memory board) two to go (AY sound board and 80 column board)... at least until I can think of something else to try.
Edited by CharlesMouse, Sun May 5, 2019 4:19 AM.