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From: daveh@cbmvax.commodore.com (Dave Haynie)
Newsgroups: comp.sys.amiga,comp.sys.amiga.tech,comp.sys.amiga.hardware
Subject: Re: A3000 Video Chips
Message-ID: <13061@cbmvax.commodore.com>
Date: 5 Jul 90 19:23:10 GMT
References: <4741@munnari.oz.au> <13060@cbmvax.commodore.com>
Reply-To: daveh@cbmvax (Dave Haynie)
Organization: Commodore, West Chester, PA
Lines: 24

In article <13060@cbmvax.commodore.com> peter@cbmvax (Peter Cherna) writes:

>On A2000's with ECS, I think you have to cut a trace/add a wire to do the 
>same thing.  

The A2000 also has a jumper, J102, but it's what we call a PCB jumper instead
of a strip-post jumper.  The strip post jumper, such as J200 on the A3000 which
controls PAL/NTSC power-up, has a shunt block that's easy for a user to move
by hand (providing you have small hands, at least).  The PCB jumper is made of
two metal pads with a thin wire connecting them.  To pick PAL, you cut the
wire, to pick NTSC, you drop a blob of solder between the two pads, provided
that it had once been cut.  Basically, the PCB jumper is supposed to be the
kind of thing that's set up once and left that way.  Much like cutting a trace,
only, it's an intentional trace cut, not a mistake.

>     Peter
>     "The Boing! Award Winning" Peter Cherna, Software Engineer, Commodore-Amiga, Inc.



-- 
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
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	"I have been given the freedom to do as I see fit" -REM