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Re: Mistery card
In article <3f1ce711.259793933@news.edisontel.com>,
andrea@modelNOSPAMberg.com (Andrea) wrote:
> On 22 Jul 2003 06:51:47 GMT, quadrajet1@aol.com (Quadrajet1) wrote:
>
> > Fits the Apple ][+ and //e.
>
> Does it mean it is useless for a ][?
>
> >I have been selling these cards brand new from
> >time to time on eBay, along with the 768k of additional memory. Still have a
> >few left. It does not replace the 64K / 80 column card on the //e however.
>
> Of course, given the different slot.
>
> >Does fit in one of the slots across the back.
>
> Which one, usually? 3,4,7?
Someone (Quadrajet, perhaps? I've lost track) mentioned using an
on-the-card RAM test by calling out to $C20A, which would indicate that
they used theirs in slot 2. (A $CXYY jump implicitly indicates that
you're calling a routine in the ROM of a card in slot "X") With any card
that meets minimum specs, the slot number is irrelevant, since the card
will, all on its own, figure out what slot it's parked in.
Really, Andrea, you're thinking about it too much. A slot is a slot
(except in the case of interrupt-producing cards, where you want to have
the card in slot 7, or have ALL higher numbered slots filled so that the
INT signal can get through. But since a memory card doesn't produce
interrupts, that's a non-issue)
Pick a slot - any slot - except the AUX slot - and plug that puppy in.
You'll quickly find out if it does anything useful in your rig. It's not
like you're going to fry anything. Voltages and connections on the slots
in the Apple II series were essentially constant across the line - a
couple of very minor changes to signals that were rarely (if ever) used
are the only variations, and to the best of my knowledge, none of them
are in any way "dangerous" to a card. With the exception of the //c (no
slots to plug into), a card made for one machine will *AT LEAST* survive
being plugged into any of the others, and in most cases, it'll work
exactly like it's supposed to.
Worst-case scenario: It doesn't do anything useful for you, so you pull
it back out.
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