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From: lkoop@pnet01.cts.com (Lamonte Koop)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Beginer Questions (How Does the amiga use MEMORY?)
Message-ID: <6837@crash.cts.com>
Date: 11 Jan 91 02:16:01 GMT
Sender: root@crash.cts.com
Organization: People-Net [pnet01], El Cajon CA
Lines: 38

yorkw@stable.ecn.purdue.edu (Willis F York) writes:
>Kinda a "specific" question but my ADRAM board came with M514256A-80R
>chips, the 80R means 80 ns (The R means ???) so the company i got the
>chips from sent "faster" chips than what was needed right?, or perhaps
>the ADRAM board needs faser chips because it'sa "Hack" replacing the A501.

What probably happened is that when the board was manufactured they either had
extra 80ns parts around, or got a good bulk deal on them.  I'm not
specifically familiar with the AdRAM, but I don't see any reason why 80ns
parts would be _needed_ unless they were doing something bizarre. 

>
>Must i use more 80ns chips to upgrade. (I'm attempting to save $$)
>What weirdness could happen it i used say 120ns chips might this cause 
>problems.

I suggest you call ICD to find out exactly what they recommend.  It will
probably be in the 100-120ns range.  If the chips you use are too slow, the
board simply will not work.

>
>It's my birthday so i want to get my board up to 4 meg..
 
Happy birthday :^)

>yorkw@ecn.purdue.edu  Willis F York    
>----------------------------------------------
>Macintosh... Proof that a Person can use a Computer all day and still
>not know ANYTHING about computers. 



                             LaMonte Koop
 Internet: lkoop@pnet01.cts.com         ARPA: crash!pnet01!lkoop@nosc.mil
           UUCP: {hplabs!hp-sdd ucsd nosc}!crash!pnet01!lkoop
  A scientist is one who finds interest in the kinetic energy of Jell-O
   moving at ridiculous velocities...an engineer is one who can find a
               real-life application for such silliness.