Date   : Thu, 02 Jan 1986 01:30:04 GMT
From   : "Phil Dimond, ms:SNA/CSS Engineering,Sydney,Aust." <dimond%aussie.dec@BRL.ARPA>
Subject: Modifying apple CP/M bios/bdos.

       I have an Apple IIe lookalike, and I am trying to use the full 40
tracks that are available on the disk drives. Microsoft has not made this
especially easy, as they supply neither the MOVCPM utility nor the source
code for the BIOS or BDOS. I beleive that the modification requires only
a change in the system's BIOS to tell it that there are more sectors.
       From the information that I can dredge up, the system was originally 
set up for 35 track drives as the inner 5 were considered unreliable. The 
disk drives that I am using, and the disks I use, are, however, quite good
in this respect, and I want to use the extra 14% or so of disk space (I have
just the application for it....). Microsoft here in Australia have been
singly unhelpful (in fact, as soon as the word "source" was mentioned they
became rather abusive).
       Has anyone out there in Netland attempted this modification? If so,
please send mail to me directly. If anything comes of the responses, I will
post a summarised followup to net.micro.cpm and net.micro.apple .

                                               Thanks in advance...
                                               Phil Dimond.
                                               DEC CSS Sydney, Australia.

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