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

[Rubywand <rubywand@swbell.net>]

James Higginbotham writes ...
> 
> Rubywand wrote:
> 
> >      Eventually, we replaced the KB with one from a terminal and added a home
> > brew KB circuit based upon SMC's KR2376 ST. The new KB plus a minor $F8 ROM mod
> > gives us u/l case, non-mechanical Shift-lock, and auto-repeat. Since, on the II+,
> > Reset is such a useful key (and because it works well for add-on special key
> > sequences) we pretty much left it alone-- except for adding a latch circuit to
> > let software toggle On a Control-Reset option.
> 
> 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