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From: ah923@freenet.buffalo.edu (Stanley J. Hiller)
Subject: Troubles with 6270 board
Message-ID: <D5nJnC.LGM@freenet.buffalo.edu>
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Reply-To: ah923@freenet.buffalo.edu (Stanley J. Hiller)
Organization: State University of New York At Buffalo, NY (USA)
Date: Sat, 18 Mar 1995 20:01:59 GMT
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I (with the aid of numerous helpful people) have finally gotten my
board into DL mode. But it is now misbehaving in an entirely different
manner. The board will go into DL mode, and allow me to DL the pcode
interpreter without problem.

When I press reset, though, I don't get a beep from the peizo and I
don't get anything on the LCD (I've tried adjusting its contrast).
Also, IC tells me that it can't synchronize with the board.

I've already asked a few people, and the general consensus is that
it's a problem with the RAM chip or 74HC373. Might anyone be able to
offer some more specific help with this? Perhaps someone could suggest
some tests to determine which chip is misbehaving, and/or tell me
where I can get a replacement? Also, if anyone could offer any ideas of
things besides the RAM or latch that can be misbehaving, I'd be happy
to hear them. In genereal, any help would be greatly appreciated.

Thanks in advance,
Stan Hiller
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