Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!ncar!gatech!udel!rochester!pt.cs.cmu.edu!o.gp.cs.cmu.edu!andrew.cmu.edu!gt0t+ From: gt0t+@andrew.cmu.edu (Gregory Ross Thompson) Newsgroups: comp.sys.apple2 Subject: Re: Softswitches and Rom Routines Message-ID: Date: 9 Feb 91 03:57:58 GMT References: <1991Feb7.165018.768@cunixf.cc.columbia.edu> Organization: Carnegie Mellon, Pittsburgh, PA Lines: 28 In-Reply-To: <1991Feb7.165018.768@cunixf.cc.columbia.edu> stc7@cunixb.cc.columbia.edu (Steven T Chiang) writes: > I have a couple of questions. Does anyone know what the > softswitch $c0e2 does, or what information it contains? I couldn't > find any info about it in the firmware ref, or hardware ref. According to my "Apple IIGS Technical Reference" book, C0E2 is Disk stepper motor phase 1 low. That's a new feature in the GS that's not in the older //'s according to the book. It doesn't say any more than that about it, though. > Or, does anyone have any info about rom routine $f8fa? When I > call it, it will poll the 3.5" drive, if there is a disk inside of it. Unfortunately, the book doesn't mention that memory location at all... > Thanks No problem... > _______________________________________________ _______________ > | Steve Chiang Apple //gs forever | Coming Soon: | > |-----------------------------------------------|---------------| > | Internet : stc7@cunixb.cc.columbia.edu | DreamGrafix | > | America_Online : DWS Steve | 3200 power | > |_______________________________________________|_______________| -Greg T.