alitel's latest activity

update on the status of work: I have completed the design of the RAMbow PCB, I will send it to production in the next few days

Hi folks -- just performing a resurrection of a very old thread here :) I wanted to document and share my recent experiments with...

Hi there -- I gave the A19 "being maybe pulled high" issue a try yesterday by grounding out the A19 pin on the card connector to force...

Apologies -- I've attached the datasheet here, with the entire truth table. (What I provided was an excerpt of the most relevant rows...

Hi there -- OK, so yesterday I did some testing and poking around. I had built a little fixture to allow me to mess with the outputs of...

Hi there -- I got the board socketed (15 of 16 pins were co-operative lol; the ground pin was NOT). All still in working condition. I...

Hi all -- I have the 100A board back out and will try to solder in the socket tomorrow (it's Tuesday night here now, Toronto Canada). I...

Hi na103! I'm glad you're joining the discussion, the more the better :) If you ask me, a modern re-engineering of the Rambow (lol)...

Oh, the bodge wire on the back of the 100B expansion card was me grounding pin 29. As I mentioned before, I wasn't able to find anything...

Hi! Thank you for the comprehensive reply! (I very much appreciate it) I agree that it might be best to socket E104 and go from...

Hi there -- I found time today to try out the initial mods to get the 100A to 512k. Sadly, I've not been able to get it working yet...

Thank you! This is fabulous! I would like to try to enable the 512k option first, as being simpler from a rework point of view. If I can...

Thank you also for this! I do see an expired listing on ebay for one of these. I will add the part numbers to my ebay saved searches...

Thank you for this! I've got a copy of the technical manual addendum and will work away on wrapping my head around the memory expansion...

Hi there -- hey, that's brilliant news! I'm happy to do some reworking on the card and/or board -- I could try the simpler 500k mod...