Re: Need help with A2 mystery boards

[shack@deimos.frii.com (Randy Shackelford)]

In article <53tpqj$dp0@borg.svpal.org>,
Paul Creager <wily@svpal.svpal.org> wrote:
>Robert Sutton (sfyfsi@scfn.thpl.lib.fl.us) wrote:
> >ROM Card
> >Apple Computer, Inc.
> >(C) 1978
> >600 - ______ - ___
> >
> >Has a red-handled switch, and chip (A2) missing
>
>These came out after the ][+, with Applesoft and the Autostart ROM, came 
>out.  It either provides Applesoft, for use in an original ][, or Integer 
>BASIC for use in a ][+.  It depends on which chips are installed. 

If a chip is missing, it's most likely an integer set. There is no D0 or D8
for integer. You can add programmer's aid #1 to D0 and the inspector/watson
chip to D8. Never seen that one but both my integer ][s have D0.

>When the red switch is down, you use the ROMs on the motherboard, ie as 
>if no card was added.  When the switch is up, you use the ROMs on the 
>card.  If it's the Integer card, you might also have the Programmer's Aid 
>#1 chip installed.

A thing worth mentioning is if there is no connection on the solder pad
labeled F8, you get the F8 ROM on the logic board, regardless of the switch
setting. I connected it on my card since I either want Applesoft or integer,
not mix and match.

>Also, having an empty socket (A2) is normal.  I'd guess that what you 
>have is the Integer card.  I could be wrong of course...  :)

I'd say you're right
-- 
Randy Shackelford                                 
shack@frii.com