Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!snorkelwacker!mintaka!olivea!samsung!zaphod.mps.ohio-state.edu!wuarchive!udel!rochester!pt.cs.cmu.edu!o.gp.cs.cmu.edu!andrew.cmu.edu!jh4o+ From: jh4o+@andrew.cmu.edu (Jeffrey T. Hutzelman) Newsgroups: comp.sys.apple2 Subject: Re: DMA, SCSI and $C1 filetypes questions Message-ID: Date: 19 Oct 90 16:40:28 GMT References: <1990Oct18.171229.15406@uokmax.ecn.uoknor.edu> Organization: Carnegie Mellon, Pittsburgh, PA Lines: 20 In-Reply-To: <1990Oct18.171229.15406@uokmax.ecn.uoknor.edu> 1.) Yes, they will work without DMA by throwing a DIP switch. See the review in the October, 1990 issue of Nibble Magazine (the ONLY general Apple //-specific magazine as of 1/91). 2.) I believe they are; you might want a second opinion. 3.) The format of $C1 files is documented in the Apple file type note, availabe for ftp on apple.com and for download on America Online in the ADV libraries. As for screen shadowing, text and old video mode shadowing is always on in 8-bit mode; I'm not sure about SHR shadowing. I don't believe that any I/O shadowing is guaranteed to be on under GS/OS, as special memory (bank 00 especially :) and also bank 1) is a precious commodity in that environment. ----------------- Jeffrey Hutzelman America Online: JeffreyH11 Internet/BITNET:jh4o+@andrew.cmu.edu, jhutz@drycas.club.cc.cmu.edu, jh4o@cmuccvma >> Apple // Forever!!! <<