jlb@aipna.ed.ac.uk (John Beaven) (06/13/90)
Hi folks A friend of mine has a SHARP 4501/A laptop PC. This machine, no longer in production, came with 256k of RAM which were upgradeable (in 128k increments) to 640k by plugging a card underneath the computer. The card itself takes perfectly standard chips, but it seems impossible to get hold of it nowadays. Does anyone out there happen to have the schematics so I can make one, or have any ideas about how to proceed? Any help will be greatly appreciated. John jlb@aipna.ed.ac.uk
psfales@cbnewsc.att.com (Peter Fales) (06/15/90)
In article <2488@aipna.ed.ac.uk>, jlb@aipna.ed.ac.uk (John Beaven) writes: > Hi folks > > A friend of mine has a SHARP 4501/A laptop PC. This machine, no longer in > production, came with 256k of RAM which were upgradeable (in 128k increments) > to 640k by plugging a card underneath the computer. > > The card itself takes perfectly standard chips, but it seems impossible to > get hold of it nowadays. Try Able Microcomputer Systems, 211 Dempsey Rd, Milpitas, CA 95035. 800-321-2627 (or CA 408-262-0774). They sell a number of accessories for the Sharp line and according to the flyer I have, the 128KB RAM card costs $115, with each additional 128KB for $79. I have no connection with Able, other than as a satisfied customer. (I have purchased a replacement battery and an EPROM cartridge from them on separate occasions, and both orders arrived quickly with no problems.) -- Peter Fales AT&T, Room 5B-420 N9IYJ 2000 N. Naperville Rd. UUCP: ...att!ihlpb!psfales Naperville, IL 60566 Domain: psfales@ihlpb.att.com work: (708) 979-8031