Re: apple //c, which version?

[ralphp@gcstation.net (Ralph Wade Phillips)]

Hi, David!

In article <52sfs8$kub@newsbf02.news.aol.com>, suprdave@aol.com (SUPRDAVE)
wrote:

> i got 4 //c's for $20 with the bricks on a rope missing though. anyway,
> two worked, one didnt but i reseated things and it worked, and one with a
> doa power supply. while i was dismantling two of em, i noticed the case
> designs are different; on one model, the plastic peice over the ports in
> the back is a separate part with tabs that break off easy and on the other
> that same back panel is molded into the top cover which makes a more
> sturdy design. based on this, which model is newer or would have the 32k
> rom upgrade? also can someone gimme the poke command for determining if
> 3.5 drives are supported. i cant access the faq unfortunately. .
> 

        Try a PR#7.  If it DOESN'T support the UniDisk 3.5, then you'll
get an attempt to boot off of an external 5.25" floppy and a (after a few
seconds) "Check Disk Drive" message.  If it DOES support the UniDisk 3.5,
!AND! is NOT the 4464-type //c, then you'll get "AppleTalk Offline".  If
it has four, 4464 DRAMs instead of 16, 4164 DRAMs, then it supports the
UniDisk 3.5 already (easy to spot - from front to back, pointing right to
left, on the RIGHT side as you look at the motherboard as if you were
looking at the keyboard.)

        The two-piece case should be the later design, whereas the
three-piece case might or might not be a REV"A" ROM board.

        RwP

-- 
Ralph Wade Phillips, CET #LA-82
ralphp@gcstation.net