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From: ranjit@eniac.seas.upenn.edu (Ranjit Bhatnagar)
Newsgroups: comp.sys.amiga.tech
Subject: Need advice on hardware projects
Message-ID: <9891@netnews.upenn.edu>
Date: 13 Apr 89 22:56:51 GMT
Sender: news@netnews.upenn.edu
Reply-To: ranjit@eniac.seas.upenn.edu.UUCP (Ranjit Bhatnagar)
Organization: University of Pennsylvania
Lines: 39

I'm considering building one or more of the following hardware
projects, for kicks and to save some dough.  I'd like advice
from those In the Know as to which are practical and which
I should save for the pros, and any relevant information that
you can spare.

	* A zorro-II card cage for the 1000 
		I figure I need a case, a real smooth power supply,
		and about a zillion bus drivers.  I'd hope to be able
		to plug 2000-style memory and hard disk cards in it.
		This SEEMS like it should be easy, so what am I missing?
		What's a limit on the number of slots I can have?  How do
		I avoid timing problems and such?  And where can I get a QUIET
		fan to put in the box?

	* A 32-bit memory card for the Ronin Hurricane 1000.
		I have no idea how complex a project this is - there must
		be SOME reason why an unpopulated 32-bit card costs
		over 500 bucks, but I'd love to avoid paying that.
		What DOES make a 32-bit card cost so much more than
		a 16-bit card, after you factor out the memory chips
		themselves?  And are 120 ns chips fast enough?
		Would a hand-drawn pc-board be far too noisy for
		such an application anyway?  (Well, drawn in MacDraw
		anyway.)  Could the LUCAS design be easily adapted?

	* A memory card - 32-bit or 16-bit - that would take SIMMs.  Sometimes
		those are cheaper.  

Well, that's about it.  If I dig up or invent any successful designs,
I'll share 'em with the net...

	- Ranjit



"Trespassers w"   ranjit@eniac.seas.upenn.edu	mailrus!eecae!netnews!eniac!...
	I'd be calling all the hotlines/I'd be missing all my deadlines
	I'd be standing in the breadlines/I'd be six feet underground