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From: clubmac@runx.ips.oz (Macintosh Users Group)
Newsgroups: comp.sys.mac
Subject: Re: Getting 1 Meg SIM boards to work in your Mac
Message-ID: <1063@runx.ips.oz>
Date: Mon, 17-Aug-87 01:41:36 EDT
Article-I.D.: runx.1063
Posted: Mon Aug 17 01:41:36 1987
Date-Received: Sat, 22-Aug-87 01:06:20 EDT
References: <1492@sputnik.COM>
Reply-To: clubmac@runx.OZ (Macintosh Users Group - Sydney, Australia)
Organization: RUNX  Un*x Timeshare. Sydney, Australia.
Lines: 18

moriarty@tc.fluke.COM (Jeff Meyer) writes:
> A friend tells me that something needs to be jumpered on the Mac+ board so
> that the other 2M can be accessed, and he frowned on the possiblity of a
> 2.5MB combination.  Two questions for you hardware people, or people who
> have installed Dove upgrades WITH the 1 Megabyte cards (eight or nine chips
> per card): Is 2.5 MB an impossibility?  And what jumpered operations need to
> be made to get a Mac+ to recognize that other 2MB? (This is the one I REALLY
> want to get an answer to).
>
  You need to remove resistor R8 - which should be found toward the rear of 
  the Mac+ logic board in the general area of the modem and printer ports.
  It's clearly marked with "256K BIT" on one side and "RAM SIZE" on the other.

  Which brings me to my question: How much are the SIMMs and who's the best
  supplier? A supplier here in Australia is selling their own SIMMs ( made
  with Toshiba (where's that damn sub?) 120ns 1-mbit chips) for $995 for
  2 meg (US$700). We would like to see whether it is worthwhile to buy them
  from the US.