Re: IIGS ram card work in ][e?

[supertimer@aol.com (Supertimer)]

Randy Shackelford <shack@onyx.southwind.net> wrote:

>Supertimer <supertimer@aol.com> wrote:
>
>:>I found a IIgs ram card in a box of computer stuff. I already have one
>:>in my IIgs, will it work in a ][e? It's a 1 meg card.
>
>: Nope.  The IIGS has 24-bit addressing.  The IIe does not.
>
>There is a more fundamental reason why IIgs memory cards won't work, namely
>the inability to physically fit in and connect electronically.

That's what I said.  It is electronically different and thus addressed
differently.

>: IIGS memory cards support the way the IIGS looks at memory, as
>: a linear memory space of 16MB (the IIGS splits this into 8MB of
>: RAM and 8MB of ROM space, so RAM cards are limited to
>: 8MB).
>
>There is support for only 1 mb of ROM, in banks $F0-FF. The SHR video displays
>and native soft switches are in banks $E0 and $E1. The vast majority of banks
>from $80 on up are unallocated.

Thos unallocated banks are used by the RamKeeper from
Applied Engineering to set up a ROM disk for the IIGS.  That
was one of the neatest features of the RamKeeper, the ability
to keep two 8MB cards and thus max out the computer's
16MB potential.