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From: dns@essnj1.ESSNJAY.COM (David N. Sears)
Newsgroups: comp.unix.sysv386
Subject: Re: Adaptec 1542 won't move off I/O port 330!!
Message-ID: <778@essnj1.ESSNJAY.COM>
Date: 6 Dec 90 01:38:38 GMT
References: <1990Dec3.205338.21158@oct1.UUCP>
Organization: ESSNJAY Systems Inc., Bethany, CT, USA
Lines: 23

In <1990Dec3.205338.21158@oct1.UUCP> mason@oct1.UUCP (David Mason) writes:

>In a desparate attempt to prevent an I/O port conflict between a 1542B
>and a Stallion port card at 330, I changed the port of the Adaptec by
>fiddling the jumpers and changing it in /etc/conf/pack.d/dsk/space.c. 
>But then as soon as I re-power the system after changing jumpers, the
>Adaptec's bios screams that it can't find the card at I/O port 330! 

>Is the port address of 330 hard-coded into the bios on the card?  Seems
>very strange that the jumpers are avaliable to do it, yet the card's own
>bios won't accept it.  Any comment from the Adaptec experts?

Yes, 330 is hard-coded into the bios. Look at the Adaptec User Manual.
The BIOS only operates with the "default" jumpers, but your
operating system driver doesn't care (ISC, at least). If your
AHA154[02][AB] is the only disk controller you have, then you
won't be able to boot a system. If you have a MFM controller as
well, then Unix will be able to use both; DOS will require
an additional device driver.

David Sears
EssnJay Systems, Inc.
Huntington, CT