6502.org

Hello to all,
with my last KIM-1 a few month ago, I received a memory board with 64 x 21L02, a 6522 and five sockets for 24 pin (EP)ROM. The board looks exactly like the KIM with the two Connectors "E1...E22" and "A1...A22".
So, I think it is an expansion-board of 8 KB RAM/ROM for KIM, SYM etc.
It is manufactured by "The Computerist, PO Box 3, Chelmsford MA, Copyright 1977".
But I have no documentation and no idea how to connect it to the KIM. Surely I could connect the single "A" and "E" connector- pins to the equivalent pins of the KIM - but what when something goes wrong?!. KIMs are rare nowadays....
So, does anybody have a schematic diagram or a homepage for this? Any information that helps is highly welcome!
Best regards
Charly DL4DBY
Sorry for my poor english - my last lessons are dozens of years away....

http://retro.hansotten.nl/lee-davison-w ... m-sym-aim/ contains the manual

Wow, that is exactly what I need. Although, I wonder why I couldn't find it with my google...
OK thanks alot, Hans. Perhaps I will find the schematic diagram one day - but I hope it will work now.
Many thanks again

Charly DL4DBY

Hm, I have the schematic, on paper scanned already and send it to that website. Somehow it did not make it online I guess. Give me some days and I will place it online.

You did? In that case I apologise, I don't seem to have it so must have saved it somewhere 'safe' and can no longer find it.

If you'd send it again I'll get round to adding it sometime soon.

Lee.

Thanks to all - especially to Hans - my "Memory Plus" memory expansion seems to work now. I have adressed the memory to $2000 and I can acces the RAM from $2000 to $3FFF. Also the four EPROM sockets are accessible from $C000 to $DFFF.
Wow - after all these years it is still working!
Thanks again.
All the best
Charly DL4DBY

The Memory Plus appendix (circuit diagram, technical note) we talked about is available at

http://retro.hansotten.nl/lee-davison-w ... m-sym-aim/

Just the raw scans. The original diagrams were A3 foldouts, I made A4 overlapping copies of reasonable quality.
I send an email to Lee, so he may pick it up and at to his very nicely done html version of the manual.

Good to see the hardware working again!

Hans

Got it ta much. Where is the 'Application Note #1' page from? Is it from the KIM manual?
Thank you.

Lee.

The application note was in the Memory Plus manual, just before the circuit diagrams. I had a Memory plus board on loan for a review in the dutch RB electronics magazine, where it appeared in may 1979, http://retro.hansotten.nl/uploads/rb/do ... ryplus.pdf At that time I made a copy of the manual to write the article and kept that with the original draft all those years.

Hans

The "Memory Test Program" on pages 21 - 23 doesn't work if you type it in. I found three scan errors in the listing:
adress "002D" is wrong must be "002C"
In adress "0040" not "A5 D0" but "A5 00"
In adress "00B1" not "F0 0E" (BEQ) but "E0 0E" (CPX, see comment)
Nevertheless, thanks to all!
Best regards, Charly

I was looking at this old post for information on the MemoryPlus board for the KIM-1/SYM-1/AIM.
A friend has one and was looking for info.
All of the links on this old post are broken
I did a google search and found this:

http://www.originalwoodworks.com/aim65/ ... emPlus.pdf

Hope this helps someone else in the future.
Dwight