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.