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Conference hydra::amiga_v1

Title:	AMIGA NOTES
Notice:	Join us in the NEW conference - HYDRA::AMIGA_V2
Moderator:	HYDRA::MOORE

Created:	Sat Apr 26 1986
Last Modified:	Wed Feb 05 1992
Last Successful Update:	Fri Jun 06 1997
Number of topics:	5378
Total number of notes:	38326

1997.0. "Help with A1000 Problem needed" by GUCCI::HERB (AL) Wed Dec 14 1988 15:15

A friend of mine from outside DEC has asked me to pass on a
problem that he's having with his A100 with the hop that someone
might have some suggestions. I'll forward any replies directly to
him (which I'm sure will be appreciated). 
 
"I have an Amiga 1000 which worked perfectly with my 1 Meg
Starboard until I added a hard disk to the system. Now I cannot
get the machine to stay up. It crashes the machine and requires a
cold start (asks for Kickstart) to get it going again. I have a
Supra 4x4 SCSI controller and a Seagate 63 Meg disk. Assuming
this was the infamous PAL chip problem, I took it in and had them
grounded according to CBM guidelines. It helped but I stoill got
occasional crashes. It degraded into a continouous problem. I
talked to Supra tech support who recommended an alternate
method using heavier wire and grounding them to the daughterboard
and to the motherboard. This was also unsuccessful. I am not sure
what to do next and would appreciate some advice before I
sink any more money into this. Is this a PAL problem? Will
replacing the PALs help? Is this a compatibility problem with the
Starboard and the Supra? Has anybody out there experienced the
same problems?"

T.R	Title	User	Personal Name	Date	Lines
1997.1	It worked for me...	LEDS::ACCIARDI	Time to change this damn message	`Wed Dec 14 1988 15:33`	6
	I ran a Supra and a Starboard on an A1000 for a year with no problems. However, the system would not boot unless the Supra was the first device on the buss. Has your friend tried this? Ed.
1997.2	.	NOBHIL::BODINE_CH		`Wed Dec 14 1988 17:49`	8
	I have that combination up and running on my a1000 as well (albeit a 20 meg Supra). Does the system hang or crash? I recall in the documentation that I got with the new controller software (version 5.2 I think) that some drives will not work properly with the pseudo DMA access switch turned on. Just an idea..
1997.3	Any more help?	GUCCI::HERB	AL	`Wed Jan 11 1989 09:01`	4
	Does anyone else have any suggestions regarding the problem referenced in the base note? Thanks..AL
1997.4		Z::TENNY	Dave Tenny - VAX LISP Development	`Wed Jan 11 1989 15:49`	12
	My supra is the first device off the bus, extra memory is after that. No problems. The only simple thing I can think of to ask is: Do you ALWAYS make sure your hard drive is on BEFORE powering up the CPU? (And does the supra card receive this power?) Any power consumed beyond a couple meg extra memory will drain the power of the A1000 unacceptably.
1997.5	Ever resolved?	DECEAT::LANDINGHAM	Guy M., BXB1-1/F11,293-5297	`Wed Oct 18 1989 19:09`	7
	Did the original author ever get resolution here? FWIW, my 1000 with a 1 Meg Starboard-II and CLtd. SCSI adaptor continually crashed until I took it apart and did the PAL grounding mod _myself_ (thanks, AZ). It's been solid as a rock since then. Good luck...