Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!usc!ucsd!ucbvax!UTCVM.BITNET!MQUINN From: MQUINN@UTCVM.BITNET Newsgroups: comp.sys.apple2 Subject: Re: One Byte Memory Reads Message-ID: <9008082141.AA25062@apple.com> Date: 8 Aug 90 21:01:36 GMT References: Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 24 >I was wondering if there is a way to make the GS only do an 8-bit reference >while in native mode. Well, taking the GS's CPU out of 16-bit mode intl 8-bit mode is HOW you take it out of native mode, so it's impossible to be in 8-bit mode and native mode at the same time, although you can still keep the speed at 2.75Mhz while you're doing it. You COULD switch to 8-bit mode before the read, then switch back to 16-bit mode right afterwords, but I don't know if that's what you really want to do. Anyway, I -think- this will switch from 16-bit to 8-bit: SEC XCE I can't remember if this takes it FROM 8-bit or puts it IN 8-bit mode, but I'm sure it does one of them. The opposite of this would be: CLC XCE I'm sure someone else will post the correct way, if this is wrong. BTW, just in case you didn't know, this is in assembly, although I'm sure you did :)