LUCAS Problems

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#2775

From: Robert Sexton
Date: Tue, 16 Jan 1990 22:15

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I have my lucas board together, but it will not gome up.  I have checked
all of the VCCs and GNDs so far, and everything is mostly in order(I had 
to wire in a GND)There is a problem with the 68881, which list 1 pin, b1, as being 
both VCC and GND :-) but I assum from my my checking that everything is probably OK.
the BOARD will not flash the led.
when I check it with the logic probe, it is eiether running or halted.
after sever trials, it was determined that the board
would run for 0-30 secs and then halt. it is not consistent in this.
when it runs, a0-a4, a7 are active , as well as all of the data lines.
the rest of the address lines are stable.  I forget what R/W does..
  Any Help. would be much appreciated
-- 
Robert Sexton, rsexton@uceng.uc.edu 
Box Full O' Transputers... The Breakfast with MIPS
I do not speak for anybody except myself.

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!uceng!rsexton
From: rsexton@uceng.UC.EDU (Robert Sexton)
Newsgroups: comp.sys.amiga.tech
Subject: LUCAS Problems
Keywords: getting to square one
Message-ID: <3336@uceng.UC.EDU>
Date: 16 Jan 90 22:15:48 GMT
Distribution: na
Organization: Univ. of Cincinnati, College of Engg.
Lines: 15