Apollo1260 + extra SIMM: contiguous RAM? (+ thank you Dimlow!)
 

Hello everyone,
I added the extra SIMM socket to my Apollo 1260. My goal (obviously) is to get a total of 64 Mb by putting two 32 Mb SIMMs. Since I only have one 32 Mb SIMM and some 4 Mb SIMMs at the moment, I made some tests, mainly to try out the new socket.
I noticed that I always get two separate RAM chunks. Will I get a single 64 Mb chunk with two 32 Mb SIMMs installed?

PS: I bought this accelerator card 5 or 6 years ago as "tested and working" for 200 € but it didn't work: there were some broken traces on it. Someone had (unsuccessfully) tried to repair them and put a rock-hard transparent glue on that spot. With much effort, I removed the glue but I was unable to make the necessary bridges, because the traces disappeared under the processor socket. Some weeks ago, I was looking for some schematics (again) and stumbled upon a thread about an Apollo 1240 being upgraded to 1260. There were lots of pictures of the board with the processor desoldered: bingo! I made the bridges by soldering some enameled wire on some vias and processor pins and it worked perfectly.
Thank you Dimlow, you're the man! :great

I believe that the Max Memory you can put in the Apollo is 32Mb, then again i could be wrong, its been a while. Maybe its 32Mb per simm socket:crazy:confused:spin:sleep Glad the pictures help, thats why i did it.

EDIT, i should read posts properly before i post. The amount of times i have edited this one today!!! ill just leave it as it is.

One Apollo saved ! Good news ! :great

As far I remember, with two SIMM sockets the Apollo can have 64Mb of contigous RAM, but only when using two 32Mb modules.

Right, got my Amiga's out and have checked, its 32Mb per simm as rkauer correctly points out.

Good work! :D Just reading this makes me want to repair my Apollo 1240... If only I could supply a F74 locally :sad
I just forget every single time to fill up an online order :laughing

Just noticed you're from Italy, and from the same city as me, too :crazy

I will post one to you for free 74AC74

Paisà!!! :spin

Just installed 2x32Mb SIMMs and got 64 contiguous Mbytes :)

This is so tempting, but too sad the acc won't fit in the standard case if you add another SIMM slot :crying

It does.....you just cant have a simm in it :D