Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!fub!geminix.in-berlin.de!gemini From: gemini@geminix.in-berlin.de (Uwe Doering) Newsgroups: comp.unix.sysv386 Subject: Re: 2 fas drivers, 1 machine Message-ID: Date: 11 Feb 91 20:16:09 GMT References: <1991Feb09.181134.6773@n8emr.uucp> Organization: Private UNIX Site Lines: 34 gws@n8emr.uucp (Gary Sanders) writes: >Can you install 2 copys of the fas driver in one machines? > >What I am trying to do is add a second AST 4 port card and >looking for the best way to do this. No need to run 2 copies of FAS. Look at the file space.c. All you have to do is to add the necessary init values to all arrays that are indexed by NUM_PHYSICAL_UNITS so that you end up with eight values per array. Set NUM_PHYSICAL_UNITS to 8 instead of 4, and don't forget to insert the control sequence for your second AST card in the fas_init_seq array. You can configure FAS for up to 16 ports by simply modifying space.c and the some configuration support files like i_fas, n_fas and s_fas (operating system dependent). >Can I run 2 copys and have the same IRQ with shared address mode set? No. AST cards need their own IRQ line for every block of four ports. >Can I reconfigure my current fas driver to start at 01a0 and go up to 02bf >and have a bunch of dummy ports in between the lower and upper 4? It doesn't matter what's between two addresses. FAS will only look at addresses that you explicitely tell it. Enter the eight addresses for your two AST ports in space.c, and FAS will happily use them, and only them. Uwe -- Uwe Doering | INET : gemini@geminix.in-berlin.de Berlin |---------------------------------------------------------------- Germany | UUCP : ...!unido!fub!geminix.in-berlin.de!gemini