C70:info-cpm (08/01/82)
>From EJS@Mit-Mc Sun Aug 1 15:19:06 1982
I have an IBC System 40 running CPM 2.2 with 2 8-inch floppies and software
which knows about and requires two floppies. I also have an IBC CADET 20
running CPM 2.2 with 1 8-inch floppy. I'd like to get the software which
requires two drives to run on the 1 drive system by mapping all references
to the second drive (B:) to calls to use the first (A:). Is this possible?
The operating system on the 1 floppy system, incidently thinks that
there are two drives and any reference to drive B: causes the disk
controller to crash (the system hangs after trying to select drive B:).
I don't know enough about CPM to patch this and SYSGEN a new system.
Things are also difficult since the PUTSYS and GETSYS programs supplied
with the system also assume that there is a drive B: and have hardcoded
into the system references to this drive.
The suppliers of the version of CPM (Integrated Business Computers of
California) are on vacation for a month making it difficult to get a new
version of CPM which assumes that there is only one drive. Can I patch the
system into thinking this? And once I do it, can I hack something so that
references to drive B: in software actually use drive A:. The reason why
this is necessary is that the developer of the applications software which
we are using won't havve a one-disk version out for another year and I want
to get it working on our 1-disk system before that time.
Help? -- Thanks in advance -- Eric