Vipersan wrote:So ..looks like I had it right first time ..and doubt crept in..
I'll wait for you more specfic labelling.
I hope this makes things clearer:
The attachment RAMmod4c.jpg is no longer available
I checked the pinouts on the instruction post and the RAS lines had their "A" and "B" swapped compared to the way it's wired up although it actually wouldn't make any difference as the "A" and "B" of those lines are connected together anyway.
I've edited the original pinout post to correct this and make it match the photos.
To change it you will need to move wires 33 & 34 from "A" to "B" as follows:
Wire 33 to Pin 20B (Row Address Strobe 3)
Wire 34 to Pin 17B (Row Address Strobe 2)
I also changed the other two but you haven't wired those up yet:
Wire 44 to Pin 17A (Row Address Strobe 0)
Wire 45 to Pin 20A (Row Address Strobe 1)
I have edited the original post so it shows the above corrected pin numbers and it also shows a copy of the above photo with labelling.
The rest of your wiring looks OK so far.