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I think that periodically enabling refresh is the best idea. I'll give it a try, and get back to you over the next few days.

There are some pretty good pictures of the early D32 16K - 32K RAM piggyback board here...

http://dragondata.worldofdragon.org/har ... 0early.htm

All I know is that if you don't get the page size correct it won't refresh properly. Didn't know that! I had assumed that so long as you were reading and writing from/to RAM that it would be refreshed. If you go too long between refreshes... same thing. Knew that one though... OK, please write back...

I didn't find the original source code, but here's a disassembly of the test program. Change the value of 'LDA #$0C' to speed up/slow down RAM refresh. 0380 1A 50 ORCC #$50 (SET I,F) 0382 30 8D0010 LEAX $0396,PCR 0386 BC 010D CMPX >$010D 0389 27 0A BEQ $0395 038B FE 010D LDU >$010D 038E EF 8D0020 ST...

Thanks for the feedback JamesD! I actually tried something very similar to this some time ago but the results were not very promising. I'll see if I can find the source code...

That picture is also a really good example of the OKI RAM configuration. Alastair, is your RAM configuration like this?

Alastair is correct. BTW, Another field you could add is (oblong or square) power supply type.

The following descriptions should be good enough for most people to identify exactly wiich D32 board they have installed. You could have something like a "not sure?" entry for the few people who can't identify their board. Power boards can be identified by the type of modulator used. The model numbe...

All, If I recall correctly, the 4 different RAM combinations do not directly map onto issue numbers.... Issue 5 is the most common and was available with at least 2 of the RAM combinations and maybe more. So it might be worth adding this as another field.... Simon is correct. Its very important to ...

Thanks! Apologies to yourself and Alistair for the harsh words above. I was really upset and angry after my comments were deleted.