Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ucbvax!UCONNVM.BITNET!SEWALL From: SEWALL@UCONNVM.BITNET (Murph Sewall) Newsgroups: comp.sys.apple Subject: re: Extended 80-Col. on //e Message-ID: <8806140101.aa06510@SMOKE.BRL.ARPA> Date: 14 Jun 88 05:46:24 GMT References: Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 28 >Is there anyway to use the extended memory of the Extended 80-col card with >the regular memory? Thanks. How do you mean that? What's not "regular" about the memory on the extended 80 column card (it's part of the memory of a 128K Apple). It's only "irregular" in that it needs to be bank switched (16K at a time, as the scheme goes) because a 6502 only addresses 64K (16K of which is ROM, so there's 16K of bank switched memory even in a 64K ][+). A LOT of software already uses the extended memory (AppleWorks, for example). ProDOS will allow the extended memory to be formatted as a RAM disk when 64K applications are used (Applesoft, for instance). Beagle Brothers puts out a couple of utilities that use the extended memory (as RAM in DOS 3.3, and "Extra K" allows you to switch between two Applesoft programs - one in main memory, one in the extended memory). If you want to switch the memory banks yourself, Gary Little's INSIDE THE //e (or INSIDE THE //c) is an understandable reference for a beginner (and a reasonable reference for the somewhat more advanced too). --------------------- Disclaimer: The "look and feel" of this message is exclusively MINE! (subject to change without notice; void where prohibited) ARPA: sewall%uconnvm.bitnet@mitvma.mit.edu Murphy A. Sewall BITNET: SEWALL@UCONNVM School of Business Admin. UUCP: ...ihnp4!psuvax1!UCONNVM.BITNET!SEWALL University of Connecticut