Re: Apple ][c and 3,5" disks

[dalloff@freenet.columbus.oh.us (Dave Althoff)]

David Sebastio (sebastio@joynet.it) wrote:
: stephen e buggie <buggie@argo.unm.edu> wrote:

: > If your IIc lacks the checkerboard self-test, then you need to swap its
: > ROM for the IIc Upgrade ROM chip.  The uypgrade ROM must be installed to
: > allow use of the Unidisk 3.5 drive. 

: What benefits would an upgrade of the ROMs bring to my IIc??

: Thanks, David Sebastio

If you have the $FF ROM in your //c (the original ROM) then you have no
memory self-test and you cannot use a 3.5" disk drive.  The upgrade ROM
gives you the self-test (so that when a RAM fails you can find out which
one.  Apparently the //c is prone to RAM failure for some reason), and
support for the white Unidisk 3.5.

--Dave Althoff, ][.
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