From: utzoo!decvax!cca!chris@Rand-Unix@sri-unix
Newsgroups: net.micro
Title: CP/M BDOS
Article-I.D.: sri-unix.3178
Posted: Wed Sep  8 19:07:05 1982
Received: Fri Sep 10 05:03:51 1982


I would be interested to know if there is a source of information detailing
at somewhat greater length than the table in Thom Hogan's Osborne CP/M
User Guide exactly what the input/output parameters require for CP/M
BDOS calls in assembly programming.  In particular the file manipulation
funcitons and the complexities of the file control block (FCB) have me
bewildered.  There is a "default FCB" located at OC5 hex with 36 bytes
of information.  Is this automatically changed by something else, or by
BDOS calls, or does one have to move a new FCB into this location to access
a new file?  Or is there a way to specify a different FCB at a different
address?

Thanx

chris mcmenomy (chris@rand-unix)
Rand Corp.