Re: Slot#0 on ][+

[John L <jlogo@zipworld.com.au>]

On Thu, 5 Apr 2001 01:38:35 +1200, dempson@actrix.gen.nz (David
Empson) wrote:

>John L <jlogo@zipworld.com.au> wrote:
>
>> On Wed, 4 Apr 2001 01:50:40 +1200, dempson@actrix.gen.nz (David
>> Empson) wrote:
>> 
>> >You won't be able to use a card like the Apple II Memory Expansion card,
>> >or an equivalent like the RamFactor, because they don't work in slot 0,
>> >and they don't emulate a language card.
>> 
>> I have an AST Sprintdisk 1MB RAM card and an Apple 1MB Memory
>> Expansion Card.  I tried both of them in Slot#0 and they appear to
>> work but don't provide me with the necessary 16K I need for a base 64K
>> RAM.  As you stated above, these cards probably don't "emulate" a
>> language card.  A pity.
>
>In what way do they appear to work?  Slot 0 doesn't have any firmware
>address space (and also won't support the $C800-$CFFF IOSEL area).
>Since cards like the Apple II Memory Expansion card require their
>firmware to do anything useful, I wouldn't expect anything to be able to
>use the card if it is in slot 0.

I should have qualified what I said.  The ][+ boots when I put an
Apple Memory Expansion card into Slot#0 and that is all.  I was hoping
it would allowr the base RAM (48K) to be expandable to 64K.  This, as
you stated, requires a memory card that can emulate a language card.
I only had one card that could do that  - my TransWarp // (which is
long gone).

>There might be some programs which break the rules and access the
>hardware directly for these cards, but they wouldn't be able to find the
>card in the first place, because its firmware is required to identify
>the card (unless the program in question has an option for hard coding
>the slot).

Interesting.