Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!decwrl!ucbvax!DMZRZU71.BITNET!KAPFFER From: KAPFFER@DMZRZU71.BITNET (Matthias Kapffer) Newsgroups: comp.sys.apple Subject: Re: //GS bank switch mem probs Message-ID: <8805120435.aa04163@SMOKE.BRL.ARPA> Date: 12 May 88 09:02:53 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 19 X-Unparsable-Date: Tue, 10. May 1988 19:12 CET Jeff, the Apple IIgs has no real compatiblity mode (like GO64 on a C= 128) but just a lot of single options like shadowing of video buffers (but not text page 2... ) and the I/O area, emulation vs native mode of the 65816 (don't mix this up with Apple //e - Apple IIgs compatiblity !), CPU speed etc. All of the advanced features of a IIgs can be used by programs running in "emulation". To come down to your specific problem, the hardware of the "language card" doesn't cause any troubles, but the monitor activly manages the state of the banked switched RAM in this area to offer unlimited access to it (the appropriate ROMs can be read in bank $FF anyway). This causes some EXEC files to crash which use monitor commands to switch over to the RAM and load some files into it. Also "G" commands will always call the ROM in this address range. Matthias Kapffer