From: utzoo!decvax!harpo!zeppo!whuxk!whonxa!netnews
Newsgroups: net.micro
Title: Re: CP/M BDOS
Article-I.D.: whonxa.130
Posted: Fri Sep 10 08:25:28 1982
Received: Sat Sep 11 01:27:42 1982
References: sri-unix.3178

I dont know anything about Osborne CP/M, but there are obvious answers to
all of your questions concerning standard CP/M. I would recommend the
Digital Research Guide to CP/M Interface with the proviso that you COULD
have to review the addresses for your particular implementation.
To answer your major questions:
CP/M uses only the default DMA address and FCB, but allows an interface
to change either. If changed, any disk access will use the current DMA
address (presuming that you dont restart the system) and you (the user)
specifies the FCB address in the BDOS call.
	John Beal
		either at the address shown in the header
		(except this machine will be down all next week)
	or whuxg!beal
		or Bell Labs Whippany NJ 201-386-5060