Date   : Tue, 23 Jan 1990 20:49:00 MET
From   : Noldus Information Technology bv <NOLDUS%RCL.WAU.NL@CUNYVM.CUNY.EDU>
Subject: CP/M

Ref: CP/M

Dear moderator,

Can you please add the following message to the CP/M mailing list?
Or maybe you can answer the question at once.

Thanks in advance.

Lucas Noldus (NOLDUS@RCL.WAU.NL)

==============================================

I would like to know if there is a possibility to determine the number of
free bytes on a disk from inside a BASIC program on a CP/M computer.
The type of computers I am talking about are three types of portable
computers: Epson PX-4, Epson PX-8 and Husky Hunter. Further, the type of disk
I mean is a RAM disk.

The CP/M command STAT performs this function but (1) it cannot be issued from
inside BASIC, and (2) STAT produces information on the screen that I don't
want. However, STAT must be using some kind of CP/M service call and I would
like what kind of call or machine code routine that is. The manual of the
Epson PX-8 includes a list of BIOS services, but none of those concerns disk
space. The BASIC function FRE() returns the amount of free RAM but that's not
what I want. I need the number of bytes available for file storage.

Does anybody know how to do this? Any suggestion is welcome! Thanks in
advance.


        Lucas Noldus, Ph.D.
        Wageningen, The Netherlands
        NOLDUS@RCL.WAU.NL