Ok... I have heard but not personally confirmed this.. but the A590 can address 8megabytes of fastram with no modification IF you replace all the 256x4 ram chips with 1024x4 chips
Apparently this gives 4 times more memory with no modifications to the underlying ram logic.
The 1024x4 are extremely hard to get in the same DIP package as the 256's.
Hope someone else can add to this discussion
Az
