Re: Language Card + Apple IIe

["Marc S. Ressl" <mressl@gmail.com>]

On Nov 8, 4:16 am, mdj <mdj....@gmail.com> wrote:
> On Nov 8, 4:08 pm, "Marc S. Ressl" <mre...@gmail.com> wrote:
>
> > Hello everyone,
>
> > I have a silly question, does somebody know if a 16k language card
> > works in an Apple IIe, IIc or IIGS?
>
> It would need to be one of the better-than-apple Language Cards that
> didn't require the RAM umbilical, but other than that I don't see why
> not.
>
> > pd: my question is actually more technical, I'm wondering if the /INH
> > signal is always enabled when the LC is activated, or just enabled
> > when $D000-$FFFF are accessed?
>
> /INH is asserted by an expansion card in response to some event; in
> the case of a language card, it's during an access to $D000-$FFFF
> whilst the language card memory is active.
>
> On a standard Apple ][ or ][+ /INH only deactivates address decoding
> for the onboard ROM. The IIe and IIgs however disable *all*
> motherboard address decoding during /INH. Jim Sather's book describes
> a very straightforward modification that will cause a standard Apple]
> [ to behave the same way.
>
> Matt

Hi Matt,

thanks for the response. My question is actually as follows: If I,
say, put the language card in slot 1 of an Apple IIe, and enable it by
accessing $C09x (x being that magic number I can't remember right
now), does the /INH go immediately high and thus make the computer
stop working (as not only $D000-$FFFF is disabled, but also $0000-
$BFFF)?, or does the language card do the $D000-$FFFF decoding, and
assert /INH only when that range is accessed?

I know this is a completely useless detail that most of us don't care,
but it became my hobbie some hours ago :-). I also have a reason for
making that question.

Best wishes,
and thanks!

Marc.-