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From: tait@gec-mi-at.co.uk (Phil Tait)
Newsgroups: comp.sys.ibm.pc,comp.sys.att
Subject: Olivetti M24 / AT&T 6300 Real Time Clock
Message-ID: <608@gec-mi-at.co.uk>
Date: Tue, 23-Jun-87 12:50:39 EDT
Article-I.D.: gec-mi-a.608
Posted: Tue Jun 23 12:50:39 1987
Date-Received: Sat, 4-Jul-87 17:32:35 EDT
Sender: news@gec-mi-at.co.uk
Reply-To: tait@gec-mi-at.co.uk (Phil Tait)
Distribution: world
Organization: Marconi Instruments Ltd., St. Albans, UK
Lines: 25
Keywords: M24 6300 clock
Xref: mnetor comp.sys.ibm.pc:5301 comp.sys.att:683

I'd appreciate some advice on the following from any
Olivetti M24 / AT&T 6300  experts :-

1. Olivetti (UK) tell me that the real-time clock is a MM58174, and is
accessible at port addresses 70 through 7F. When using DEBUG, all I can
read from 70-7E is FF, and 7F reads F0. This doesn't look much like a
MM58174 according to my data sheet.

Any descriptions, pointers, (or program source !) would be appreciated.

2. The reason I'm bothering with this is that I need to use MS-DOS 3.2
(for compatibility with other PCs around the site), and (according to
Olivetti UK) the M24 version isn't available. The clock update
is built-in to Olivetti versions of DOS (somewhere - I haven't found it
yet) - hence the problem.

Is 3.2 available for the M24 / 6300 yet ?

(Usual disclaimers & thanks).

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| Philip J. Tait, Marconi Instruments Ltd. | St. Albans, Herts. AL4 0JN, U.K. |
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