what apple is this?

Patrick Schaefer

Michael J. Mahon schrieb:

>> card. It uses eight 4164 chips to provide the 64k and has only six
>> slots - slot 0 and 4 are missing due to the on-board functions.
>> Usually the ROM sits on a small PCB which goes into the position of
>> slot 0.
>
> This one seems to have seven slots...

The seventh one (at the position where usually slot 0 is) holds a small
pcb with two or three EPROMS.

Data and address lines are at the same pins as for the regular slots,
but all control signals are missing. Instead of them, there are /CS_F,
/CS_E, /CS_D and /CS_DE to select the ROMs.


Patrick




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Patrick Schaefer

Guillaume Tello schrieb:

> But why are there four Roms places?
> One is clearly labelled F0-F8 Apple (Prodos)

One is at $Fxxx, the other one(s) are either 8k starting from $D000, or
2* 4k at $Dxxx and $Exxx. The fourth one is simply not connected.

I had a second monitor ROM in this place, with a switch to connect it
alternatively to the $Fxxx space.


Patrick





--
In case your mailing to my Lycos address gets bounced with an
"550 reverse connect to MXs failed" message, please re-send it one
or two times within one hour and complain at
support-premiummail@lycosxxl.de

The Lycos support tries to locate and fix this problem for more than
a year now. Whoever can help please mail them! Thx.

David Empson

Michael J. Mahon <mjmahon@aol.com> wrote:

> Guillaume Tello wrote:
> > Here it is:
> > http://pagesperso-orange.fr/gtello/whatapple8.jpg
> >
> > But why are there four Roms places?
> > One is clearly labelled F0-F8 Apple (Prodos)
> > And I think the other one is BASIC 8K, but I might be wrong.
>
> I'd guess that the card is set up to accept ROMs of different
> sizes, so there are more places for ROMs.
>
> In the photo, one ROM is 4KB, replacing the F0 and F8 ROMs, and
> one ROM is 8KB, replacing the four (D0, D8, E0, E8) Applesoft ROMs.

Minor detail: Applesoft is five ROMs: D0 through F0. The F8 ROM is the
monitor and associated firmware such as lo-res graphics, text routines,
etc.

With Integer BASIC, the language itself occupies E0, E8 and part of F0,
with the rest of F0 taken up with utilities such as the mini-assembler.
D0 was the optional "Programmer's Aid #1". Apple didn't supply a D8 ROM
but there must be something there in the INTBASIC file from DOS. I think
there was a third-party ROM which was occasionally used in that
position, but I didn't start using the Apple ][ until the ][+ was well
established.

As to the ROM saying "F0-F8 Apple (Prodos)": that doesn't make much
sense, since ProDOS doesn't live in the ROM. It operates out of the
language card RAM (in the D0-FF pages, also using part of the second
D0-DF bank). Whoever wrote the label was probably confused.

--
David Empson
dempson@actrix.gen.nz

Michael J. Mahon

David Empson wrote:
> Michael J. Mahon <mjmahon@aol.com> wrote:
>
>
>>Guillaume Tello wrote:
>>
>>> Here it is:
>>>http://pagesperso-orange.fr/gtello/whatapple8.jpg
>>>
>>> But why are there four Roms places?
>>> One is clearly labelled F0-F8 Apple (Prodos)
>>> And I think the other one is BASIC 8K, but I might be wrong.
>>
>>I'd guess that the card is set up to accept ROMs of different
>>sizes, so there are more places for ROMs.
>>
>>In the photo, one ROM is 4KB, replacing the F0 and F8 ROMs, and
>>one ROM is 8KB, replacing the four (D0, D8, E0, E8) Applesoft ROMs.
>
>
> Minor detail: Applesoft is five ROMs: D0 through F0. The F8 ROM is the
> monitor and associated firmware such as lo-res graphics, text routines,
> etc.

Good point!

> With Integer BASIC, the language itself occupies E0, E8 and part of F0,
> with the rest of F0 taken up with utilities such as the mini-assembler.
> D0 was the optional "Programmer's Aid #1". Apple didn't supply a D8 ROM
> but there must be something there in the INTBASIC file from DOS. I think
> there was a third-party ROM which was occasionally used in that
> position, but I didn't start using the Apple ][ until the ][+ was well
> established.

Inspector/Watson was often there...

-michael

NadaPong: Network game demo for Apple II computers!
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