Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watnot!watmath!clyde!cbatt!ucbvax!ANDREW.CMU.EDU!rs4u# From: rs4u#@ANDREW.CMU.EDU.UUCP Newsgroups: comp.sys.mac Subject: Mac Plus with 256K ROMs? Message-ID: Date: Wed, 8-Apr-87 07:14:01 EST Article-I.D.: andrew.MS.V3.18.rs4u.80022404.brownsville.ibm032.385.4 Posted: Wed Apr 8 07:14:01 1987 Date-Received: Sat, 11-Apr-87 06:30:13 EST Sender: daemon@ucbvax.BERKELEY.EDU Lines: 20 I was reading IM volume 4, and I came across the following paragraph: "The Macintosh Plus contains two 512K-bit (64Kx8) ROM chips, providing 128K bytes of ROM. This is the largest size of ROM that can be installed in a Macintosh 128K, 512K, or 512K enhanced. The Macintosh Plus ROM sockets, however, can accept ROM chips of up 1M-bit (128K x 8) in size. A configuration of two 1M-bit ROM chips would provide 256K bytes of ROM." Does this mean that it's possible to upgrade a Mac Plus with a pair of ROMS from the Mac SE? Would a Plus so upgraded behave properly (as far as compatibility with Plus and SE)? Are such upgrades available? Inquiring minds wnat to know... --Rich