Re: 3.5" UniDisk on a IIc

[tomk@pro-nsdapple.cts.com (Tom Kelly)]

In <4m8e6s$180q@navajo.gate.net> stever@gate.net (Steve Reeves) writes:

>In article <ggonter-2904962125540001@vtr-sta111.ramp.together.net>,
>Geof Gonter <ggonter@together.net> wrote:
>>Can anyone tell me the last IIc that needed and motherboard update to use
>>a 3.5" UniDisk? I used to have the number (When I had mine updated in
>>1988) but lost it . My local Apple rep is no help, They never sold an
>>Apple II. They just bought the dealer who did.
>
>>From the Apple Tech Info Library, <http://til.info.apple.com/til/>:
>"The Apple IIc systems that require the ROM upgrade for UniDisk 3.5
>support are those with serial numbers lower than F6051GFA2S4000."
>
>BTW, AllTech sells these ROMs.  I recently bought one and installed it
>in my IIc.
>
>-- 
>Steve Reeves
>stever@gate.net


 To find out which //c ROM version you have, go into BASIC (or if you
 don't have a disk handy, just turn on the computer and hit ctrl-reset
 after you see the "Check disk drive." message) and type the following
 line and hit return at the "]" prompt:
 
 PRINT PEEK (64447)
 
 If you get the number "255", then you have the original //c ROMs, and
 should go to your nearest authorized Apple Dealer and get your //c logic
 board swapped for free (bring your UniDisk 3.5" drive with you, along
 with any of its receipts, to verify that you actually HAVE one).  I
 believe Apple still honors this free swap, which corrects the problem of
 not being able to use the UniDisk 3.5" drive with the //c.  You should
 get the "3.5 ROM //c", which PEEK (64447) = 0.
 
 NOTE: ONLY PERSONS WHO HAVE PROOF OF OWNING A //c (with Original ROMs)
 AND A UNIDISK 3.5" DRIVE MAY GET THE LOGIC BOARD SWAP FOR FREE.  Please
 don't go to your Apple dealer and ask for the swap if you don't have a
 UniDisk 3.5".
 
 Values of the PEEK (64447) are as follows:
 
 255   Original //c ROM                   (Can't use UniDisk 3.5")
   0   3.5 ROM //c                        (CAN use UniDisk 3.5")
   3   Original "Memory-expandable" //c   (CAN use UniDisk 3.5")
   4   Revised "Memory-expandable" //c    (CAN use UniDisk 3.5")
 
   5   Apple //c+  (built-in 3.5" drive; can use Unidisk 3.5" AND Apple
3.5")
 
 For those of you who might be interested in other differences between
 //c ROM versions, see Apple // Tech Note #7 for the Apple //c.

If you need the new ROM send me E-Mail.
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