Re: Any hardware info on the Apple /// ?

[mjmahon@aol.com (Michael J. Mahon)]

Moll wrote:

>dco wrote:
>
>> The below is pretty close to what I have sitting in the basement of my
>> parents house, it does not work anymore. See link for more details here :
>> 
>> <www.apple-history.com/frames/body.php?page=gallery&model=aIII>
>> 
>> Apple /// & ///+
>> ================
>> 
>> Codename: Sara
>> CPU: SynerTek 6502A
>> CPU Speed: 2 MHz
>> FPU: none
>> Bus Speed: 2 MHz
>> Data Path: 8 bit
>> ROM: 4 kB
>> Onboard RAM: 128 kB (256 kB in revised and IIIplus)
>> Maximum RAM: 256 kB (My one has 256kb)
>> Maximum Resolution: 80x24 text, 1 bit (B&W) 590x192
>> Slots: 4 proprietary (compatible w/ Apple II)
>> Floppy Drive: built-in Shugart 143 kB 5.25"
>> Serial: optional expansion card
>> Speaker(s): mono
>> Introduced: June 1980
>> 
>> Also has a 5mb hard drive that is called a 'profile'.

<snip>

> From my research, the above is just about all the tech data I can find 
>at all. XD  I don't know where I'd look to find DEEP technical 
>information like stuff about the memory map or video handling.

Unlike the Apple II, Apple held the technical information on the
Apple /// very close.  Details were usually available only to developers
under non-disclosure.  The small number of such developers indicates
that Apple may have required a considerable commitment prior to
disclosing details.

There were a few articles published that provided some information,
in magazines like Softalk, but they are unusual.

The heavily bank-switched memory map is quite different from the
Apple II in many details, from what I have seen.

Check the May, 1983, Softalk, if you can find it.  I'll look into the
possibility of scanning the article if you can't find it.  (I'm "reorganizing"
my lab area, so things are mre chaotic than usual.  ;-)

-michael

Check out parallel computing for 8-bit Apples on my
Home page:  http://members.aol.com/MJMahon/