[comp.sys.apple2] Static RAMs

unknown@ucscb.ucsc.edu (The Unknown User) (10/26/90)

	I was just wondering if huge static RAMs are even made... 
(i.e. in the order of 256K * 1 or 1 meg * 1)...

	We're using an 8K (part 6264, a Hyundai brand I think) static RAM
in this class I'm in.. (Computer design.. We start with 2 2903s, which
are 4 bit bit slices, and build a computer up from that. Damn it's
pretty tough.. The wiring is the most boring/time-consuming.. And we
don't even have to solder.. I mean it's very time consuming even w/out
soldering.. We use this big breadboard thing where you can just put the
stripped ends into it...)

	I've realized that I know enough to make a RAM card... (I
did even before this class.. my first lower div. logic design class
was enough)...  Obviously this isn't realistic since static RAMs are
really expensive, but I was just thinking how conceptually easier it
is if you don't have to deal with memory refresh! [Actually that's the
only thing I don't know how to do now... Not that I -couldn't- do it,
I just don't know how it's accomplished.. If anyone wants to mail me 
explaining how memory refreshes are done, feel free!]

	So basically I was just CURIOUS as to if big static RAMs are
made.. It seems they'd be much more popular from a designer's standpoint
since you don't have to deal with refreshing it.. then if they were used
a lot, then the prices would come down..


	Static RAMs are basically a whole ton of flip-flops or latches,
right?  I believe DRAMs are a bunch of capacitors (thus needing to be
refreshed).

	Thanks ahead of time for any info you post/mail me.

i
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