68kMLA Classic Interface

This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.

Click here to select a new forum.
SE RAM Jumper confusion
Posted by: smrieck511 on 2023-06-07 15:47:37
I'm planning to upgrade an SE to 4MB but this board has the jumper on a daughter card, apparently with R35 and R36... am I just supposed to just remove the jumper or do I need to remove these resistors also? Thanks.
Posted by: Phipli on 2023-06-07 16:09:57
I'm planning to upgrade an SE to 4MB but this board has the jumper on a daughter card, apparently with R35 and R36... am I just supposed to just remove the jumper or do I need to remove these resistors also? Thanks.
That... isn't normal. Never seen one like that before.
Posted by: smrieck511 on 2023-06-07 16:14:32
That... isn't normal. Never seen one like that before.
It was like that when I found it. - Bart Simpson
Posted by: smrieck511 on 2023-06-07 16:17:27
also, some weird shrink wrap thing going on over here at R32.
Posted by: smrieck511 on 2023-06-07 16:30:37
Seems like it's all factory though, looking at the underside of the board. And it does work fine.
Posted by: Phipli on 2023-06-07 16:32:28
also, some weird shrink wrap thing going on over here at R32.
I'd remove the jumper and see if it works
Seems like it's all factory though, looking at the underside of the board. And it does work fine.
Some of those don't look factory.
Posted by: smrieck511 on 2023-06-07 16:48:38
I'd remove the jumper and see if it works

Some of those don't look factory.
yeah, maybe not. If that was some kind of mod, I wonder what in the world it could be for? It had 1mb installed and working fine. 4mb won't be here until this weekend.
Posted by: volvo242gt on 2023-06-07 18:39:16
Looks like someone updated the machine to the late SE memory jumper. You'll need to remove the jumper to have the computer see all 4MB.
Posted by: smrieck511 on 2023-06-07 18:46:13
Looks like someone updated the machine to the late SE memory jumper. You'll need to remove the jumper to have the computer see all 4MB.
yeah, that makes sense. Thanks.
1