NetNews Usenet Archive 1992 #31/NN_1992_31.iso/spool/comp/sys/dec/6657

Internet Message Format | 1992-12-30 | 1.7 KB

Path: sparky!uunet!gatech!concert!rutgers!spcvxb!terry
From: [e-mail] (Terry Kennedy, Operations Mgr.)
Newsgroups: comp.sys.dec
Subject: Re: Help on programming VAX disk controller
Message-ID: <[e-mail]>
Date: 31 Dec 92 04:17:37 GMT
References: <[e-mail]>
Distribution: na
Organization: St. Peter's College, US
Lines: 28

In article <[e-mail]>, [e-mail] (John C Slimick) writes:
> He needs help on programming the VAX disk controller. In
> particular, he is interested in a publication titled
>
>    "How to Program the UDA-50"
>
> which comes in three volumes, and, at one time, was
> sold by DEC as part number LK<something>. If anyone can
> help, please send email to:

  It's QP905-GZ. You might also be interested in QP906-GZ, which describes the
controllers from a physical point of view (what the LED's mean, etc.).

  However, this is a really _bad_ way to learn how to do MSCP programming.
First, the examples are really poor. Second, the Q-bus controllers (RQDXn)
work differently from the Unibus versions and the documentation does not
cover them. Third, many of the more useful sections have been censored out
of the customer edition of this document.

  If you can, grab hold of the fully functional MSCP driver that DEC donated
to UC Berkeley for the BSD Unix project. You could be able to find this on
any BSD Unix tape. There are also some other drivers kicking around in the
BSD Unix distributions, including at least one done without looking at any
DEC code (if that is important to you).

    Terry Kennedy        Operations Manager, Academic Computing
    [e-mail]    St. Peter's College, Jersey City, NJ USA
    [e-mail]    [phone]