Re: IIGS ram card work in ][e?

[Randy Shackelford <shack@onyx.southwind.net>]

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.

: 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.

: The IIe, meanwhile, can support no more than 64k at a time.
: That means the IIe has to use bank switching.

Slinky cards don't do bank switching.
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