Re: CFFA V2.0

["Charlie" <charlieDOTd@verEYEzon.net>]

"Jorge Chamorro Bieling" <bieling@terra.es> wrote in message 
1hbsddc.e9m93m1uklmwgN%bieling@terra.es">news:1hbsddc.e9m93m1uklmwgN%bieling@terra.es...
> Liam Busey <buseyl@yahoo.com> wrote:
>
>> Vince Briel wrote:
>> > I recently got my CFFA to work with my original Apple II. To do that I 
>> > had
>> > to swap out the integer basic ROMs for applesoft so that I could boot
>> > prodos. I have a ROM card somewhere but it also has integer basic. 
>> > Can't I
>> > just swap out the integer basic in the ROM card so I can boot prodos 
>> > 1.0?
>> >
>> > Is there an easier way to boot prodos on a original II that has integer
>> > basic in ROM?
>>
>> Hi Vince, I've not verified this but it is my understanding that if you
>> put a firmware card in one of the Apple's peripheral slots (not slot 0)
>> and activate it, the firmware on the card will replace the firmware on
>> the board without interfering with a language card. If this is the
>> case, a 64K Apple II with an active Applesoft firmware card in one of
>> its peripheral slots is effectively a 64K Apple II+ and will therefore
>> allow much more flexibility in running Prodos.
>>
>> Liam
>
> Liam,
>
> I think that both the firmware card and the language card drive low the
> /INH signal on the peripheral slot in order to disable onboard ROM and
> to gain control of the ROM address space.
>
> But if a firmware card is plugged in and activated (with the switch set
> to on), whenever the language card is activated :
>
> -It will drive /INH low to disable onboard ROM,
> -but /INH will already be driven low by the firmware card, and
> -The ROM on the firmware card won't be disabled by this action,
>
> And a bus fight will happen for reads in the range $d000-$ffff.
>
> Hmm, I'm thinking that you could still perfectly write to the language
> card, though, so this combination would basically behave as a
> Write-Only-Memory... :-)
>
> Well I never tried that, so I may be perfectly wrong.
>
> Regards,
> -- 
> Jorge Chamorro Bieling

Jorge,

I definitely had an Integer BASIC card running in Slot#4 on an Apple ][+ 
back in the early 1980s.  I had a language card clone in Slot#0 and I don't 
remember ever having any problem with it.  The switch on the back was great 
for breaking out of copy protected stuff with the reset key.  Unfortunately, 
I gave away my ][+ stuff years ago.  The Integer card did not work this way 
on my ROM 01 IIgs, however. In fact if I remember correctly the IIgs would 
not even boot with the Integer card in a slot.

Charlie