Newsgroups: comp.sys.ibm.pc.hardware
Path: utzoo!censor!geac!itcyyz!xrtll!silver
From: silver@xrtll.uucp (Hi Ho Silver)
Subject: Re: Designations on chips
Reply-To: silver@xrtll.UUCP (Hi Ho Silver)
Organization: Yeah, right.
Date: Sat, 12 Jan 91 20:05:38 GMT
Message-ID: <1991Jan12.200538.10760@xrtll.uucp>
References: <CNX^HV-@rpi.edu> <1991Jan8.062424.11291@d.cs.okstate.edu> <1046@accucx.cc.ruu.nl>

In comp.sys.ibm.pc.hardware, jaapv@accucx.UUCP (Jaap Verhage) typed:
$This originally was about upgrading a VGA card. As I've done the
$same thing with different chips, I'm beginning to wonder what the
$codes on the things mean. Like, what's the difference between a
$41256 and a 44256? Furthermore, there seems to be a speed

   The 41256 is one bit wide; the 44256 is four bits wide.  There isn't one
purely logical scheme for numbering chips, and some manufacturers have
a tendency to create their own favourite numbers for chips.

$designation included, like when you see the number on the chip end
$with -10. Would anyone please enlighten this poor beginner at how

   That's a 100 ns chip; it denotes the access time.  -12 would indicate
a 120 ns chip, etc.
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