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From: cs163wau@sdcc10.ucsd.edu (Gary H)
Newsgroups: comp.sys.tandy
Subject: Re: TRS-80 Model 1 TRS-DOS
Keywords: trs-dos, trs-80, Model I
Message-ID: <11495@sdcc6.ucsd.edu>
Date: 16 Jun 90 01:08:16 GMT
References: <1900@xn.LL.MIT.EDU>
Sender: news@sdcc6.ucsd.edu
Organization: University of California, San Diego
Lines: 21

In article <1900@xn.LL.MIT.EDU> tj@XN.LL.MIT.EDU (Thomas E. Jones) writes:
>I'm trying to get an older Model 1 that has the expansion box and 3
>floppy drives to boot, but it just comes up with BASIC all the time.
>This system worked a few days ago (when I got it) but I don't know
>how to boot it.  Upon power up, it just asks for the amount of memory,
>then goes into Level II BASIC.  Is there a command you must enter to
>start up the TRS-DOS?  How did the disk systems ever work?  Also, the
>system appears just the same weather the expansion box is on or off.
>Maybe the expansion box has a bad connection.  Anyone have any clues    
>out there how the old father-of-the-micro use to work?  If someone
>could just get me started with a couple commands, I could get 
>going from there.

Use an eraser on the connector that goes from the expansion interface to the
cpu (keyboard).  The model I's connectors are not gold plated (they're tin
plated) so they oxidize.  When they do, then the cpu things it has no connect-
ion to the expansion interface (it happened to me a couple of times).

Try it...

Gary