68kMLA Classic Interface

The extra accelerator RAM can be used as a RAM disk but that's about it, so even if it did recognise it, its of limited use. If the system is able to see/use 4MB then you should be good to go as that's a good amount for an SE.

Really, with accelerators this old, you tend to either get the system RAM or the accelerator RAM, not both. The extra accelerator RAM can be used as a RAM disk but that's about it, so even if it did recognise it, its of limited use. If the system is able to see/use 4MB then you should be good to go as that's a good amount for an SE. The real benefit is from the CPU upgrade itself and sometimes an FPU.

I've seen this written a few times, but I don't quite agree - the RAM showing as a disk is how they implemented the extra RAM on boards with a MMU. It shows like this when they aren't quite set up correctly. You needed virtual, set up in a very specific and careful way, with most boards, but sometimes there were other things to get right.

If you have a board doing this, drop me a message and I'll see if we can get it behaving.

The board in this thread... the logic board and card RAM are overlaid in the same address space it seems. There is no MMU. You should have 1MB on the logic board and 4MB on the card for best performance. You should be testing using System 6.0.7 or older, and need to try to get the ECC branded drivers working, to minimise unknowns.

Please leave the jumpers alone. This isn't plug and play USB. In the olden days, doing things wrong sometimes let the magic smoke out. You don't want to kill the card or SE. You have a board that makes your SE about 6x faster at the moment. Let's not create a card that makes the computer run at 0% of stock.

I noticed on my card, that the card wasn't able to load its ROM into RAM, even with the correct driver, and references "ROM Copy" (like it might be an extension of some sort).

Will do! I'm going to use another set of 1 MB SIMMs.
Also, I figured it would be wise for me to include this (I forgot to yesterday). This is what happened when booting with my previous set of 1 MB (4 256 KB SIMMs) on the logic board and 4 MB on the accelerator.

I though that one of the SIMMs could be bad (bank 3?), but maybe this could be accelerator related?:

No way of knowing without doing a load of testing. Probably just a dirty contact. Sometimes you have to reseat RAM a couple of times before it works.

the RAM showing as a disk is how they implemented the extra RAM on boards with a MMU

OK – I just installed 1 MB (4 x known working sticks) and tried booting it up with 4 MB on the accelerator, and… I get the same Sad Mac error (attached).

I just want to reiterate that I will not be touching the jumpers, but I watched a video and saw something interesting - it looks like Adrian is having a (maybe?) similar issue…?:

I plan on double-checking those sticks on the accelerator, and swapping them out with another set of 4 MB, but I have a hunch this might be jumper related.

I don't want to touch any of those jumpers unless we have a manual or someone happens to have the same card or other guidance.

I have not - could I "borrow" some from my broken SE/30?

Really, with accelerators this old, you tend to either get the system RAM or the accelerator RAM, not both. The extra accelerator RAM can be used as a RAM disk but that's about it, so even if it did recognise it, its of limited use. If the system is able to see/use 4MB then you should be good to go as that's a good amount for an SE. The real benefit is from the CPU upgrade itself and sometimes an FPU.

all support 16mb with connectix virtual - not just as RAM disk but actual RAM

I saw this older thread as well after looking for the Connectix Virtual utility and figured I would add it here as well (for possible reference):

Levco / SuperMac Prodigy SE accelerator and utility

I also tried the Prodigy RAMDisk application and it said I don't have enough RAM... Perhaps this is due to the lack of MMU too? The lack of sound is a show stopper too, as I wanted a SE to play some of the original B&W games that either don't like System 7 or don't run well on a 68030 Mac...

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