Re: 80col Card

[az268@chebucto.ns.ca (Jonathan Adams)]

william strutts (wrstrutts1@home.com) wrote:
: You have the older style 80 column card with memory.
: There is a jumper labelled J1 on the card but I don't
: see a reference to it in the manual.  My non-extended
: Apple IIe has one of those.  It is larger than the newer
: one that came with the //e Platinum which is my other
: machine. On the schematic, this is what it shows:

: J1 has two signals going into it:
:    AN3 (50)
:   FRCTXT(55)

: What that means I don't know.  Next to this are two symbols
: which look like arrows?


: --
: --
: William R. Strutts - wrstrutts1@home.com - Whatever!

: C'est moi!  http://www.facelink.com/wrstrutts

: Just hacking away...
: "PL" <pasi.loytty@iki.fi> wrote in message news:9foj0u$26n$1@tron.sci.fi...
: > I got my IIe (and Europlus) running with DOS 3.3. Thanks to all of you who
: > answered.
: > The next thing I'm a bit curious about is that since I have a 80-column
: card
: > installed, how can I actually get 80 characters wide display? This, I
: > believe, is what the card was made for? I also think that the card has 64K
: > memory installed. Is there any way to figure out the total available
: memory
: > i.e. if the memory on the card is working.
: > And finally, there's a place for a jumper on the card. What is it used
: for?
: >
: >

The jumper on the card is used to activate the double high resolution
mode. According to the extended 80 column text card supplement, This
procedure works only on the //e with the revision B (and later) main logic
board, identified by a B as the last letter of the part number on the back
part of the board. connecting the pins on the extended 80 column text card
completes a connection between pin 50 (AN3) and pin 55 (FRCTXT') on the
auxiliary slot.

--
Jonathan Adams
E-mail: az268@chebucto.ns.ca 
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