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ABI sequencing analysis on quicksilver G4?

David Johnston daj at nhm.ac.uk
Fri Jan 18 12:36:12 EST 2002

Hi, we have just purchased a new "quicksilver" G4 to help speed up 
gel analysis using ABI's Sequencing Analysis 3.4.1 (and MacOs 9.2), 
but are seeing what appears to be an incompatibility with the std 
graphics card. When scrolling across a gel image, the screen fails to 
refresh properly, and newly appearing bits of the gel have large gaps 
in them where the screen only draws grey, and / or the tracking lines 
are missing. This is far worse when scrolling from side to side, than 
when scrolling up/down. If you collapse and reopen the gel file 
window, the screen redraws correctly, but as soon as you scroll, it 
corrupts again.

Has anyone else encountered this, knows of a fix? We have tried 
increasing program memory, changing screen resolutions and colour 
depths, swapping monitors etc, all to no avail. ABI's only suggestion 
to date was to remove the graphics card and revert to a poorer 
quality one which seems somewhat of a throwback approach. NB. it 
behaves perfectly when run on the previous design G4 minitower, or on 
a titanium G4 powerbook (both MacOs 9.1)


David A. Johnston,
Secretary to the WHO Schistosoma Genome Network,
Biomedical Parasitology Division,
Dept. of Zoology,
The Natural History Museum,
Cromwell Road, London SW7 5BD, England, UK.

Tel: 020-7942-5566/5008/5152
Fax: 020-7942-5347
(from outside the UK: 44-20-7942 ****)
eMail daj at nhm.ac.uk


The  Biomedical Parasitology Division is a WHO Collaborating Centre 
for the identification of schistosomes and their snail hosts.

Now at The Natural History Museum: BG Wildlife Photographer of the Year
(until 11 March 2002), Predators (until 6 May 2002)
Coming Soon: Turbulent Landscapes (opens 19 April 2002), Dino-Birds: The
Feathered Dinosaurs of China (opens 18 July 2002, Phase One of the new
Darwin Centre (opens September 2002)


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