Re: II+ vs IIe (was Re: Apple IIe working?)

[James Higginbotham <bknight@iolinc.net>]

Rubywand wrote:

> >
> >
> > The upper/lower case is given provided you have the correct character generator ROM
> > not a modified F8..  F8 (if memory serves me correct) has the reset code and monitor
> > code in it.  The rest of the ROMs in that row either have Applesoft or Integer BASIC
> > depending on which ROM set you have.
>  ....
>
>      Okay; but, you are talking about being able to _display_ upper/lower case.
> We did a char gen ROM swap-in fairly early-- it was done when we found a game
> with messages which included lower case (Dark Forest).
>
>      The mod to the $F8 ROM ($F800-$FFFF) code is to get rid of a few
> instructions which force letter char inputs to be upper case. This permits the
> II+ to accept lower case letters as inputs without having to load in any special
> program code. For example, you can enter a program line like ...
>
> 200 PRINT "Elder Brother Wu greets you with a smile."
>
> Naturally, you want to add the capability to display lower case before doing the
> mod to accept lower case inputs from a keyboard.
>
> Rubywand

With the Upper/Lowercase chip I used, all that was required was the chip (provides
upper/lowercase output) and a shiftkey mod (provides upper/lowercase input) which was only
a wire attached to ground and connected to one of the pins on the keyboard.  No F8 mod was
required with this chip.  Believe the chip was made by Dan Paymar??  I still have it
around here somewhere in one the II+s...

--
-------------------------------
James Higginbotham - KC8KXI
bknight@iolinc.net
kc8kxi@hotmail.com