Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!ames!ucbcad!ucbvax!hplabs!hpcea!hpfcdc!hpfclp!diamant From: diamant@hpfclp.HP.COM (John Diamant) Newsgroups: comp.sys.ibm.pc Subject: Re: >640K Message-ID: <6640002@hpfclp.HP.COM> Date: Fri, 9-Jan-87 19:24:27 EST Article-I.D.: hpfclp.6640002 Posted: Fri Jan 9 19:24:27 1987 Date-Received: Sun, 11-Jan-87 22:52:06 EST References: <972@ethos.UUCP> Organization: HP, Fort Collins Lines: 25 > -Fellow posters, > Can anyone tell me how to expand the memory in a PC beyond 640K? I have > a regular video board requiring 16K and an 8K BIOS. No other peripherals > [Crequire addressable memmory. By my calculations, that leaves me with 1000K. > I have a clone with 640K installed on the motherboard. Can I expand with > piggy-backing? If so, how do I let DOS know that I have the extra memory > installed? Thanks in advance for responses. > -Darren Friedlein > ...ihnp4!ethos!darren First of all, I thought that the standard video (CGA unless you are talking monochrome) was 32K, and my understanding was that the system ROM took 64K. At any rate, there is a company that makes a board called MAXIT that allows use of both the contiguous memory about 640K (up to graphics memory) and the non-contiguous area above the graphics memory (unused normally). Look in the January Byte for an add. I don't remember the name of the company. Basically, they go through some contortions to make programs that don't know anything about this board still work; memory resident programs such as RAM disks can run in non-contiguous memory (without knowing that they are), and any program can use the extra 96K contiguous memory above the 640K max. John Diamant Systems Software Operation UUCP: {hplabs,hpfcla}!hpfclp!diamant Hewlett Packard Co. ARPA/CSNET: diamant%hpfclp@hplabs.HP.COM Fort Collins, CO