Article View: comp.sys.ibm.pc.misc
Article #3965Re: 386SX capabilites
From: Robert Collins
Date: Mon, 15 Oct 1990 23:18
Date: Mon, 15 Oct 1990 23:18
22 lines
1492 bytes
1492 bytes
In article <1990Oct15.161015.417@thyme.jpl.nasa.gov> kaleb@thyme.jpl.nasa.gov (Kaleb Keithley ) writes: >> Whoops! The 16 bit data bus prevents doing 32 bit i/o to memory mapped >>devices, and the addressing space is only 16 MB. >> > >Got any memory mapped devices in mind? We are talking about Intel >architecture here, not Motorola ;-) Accuse me of "small world" if you >want, I haven't seen memory mapped i/o for PC's in ten years, that's >what the i/o bus is for. Try being a BIOS programmer and dealing with custom and standard chip sets. We have memory mapped I/O on lots of machines in the address ranges from 80000000h - A001FFFFFh. I assure you, there are plenty of machines that use memory mapped I/O. -- "Worship the Lord your God, and serve him only." Mat. 4:10 Robert Collins UUCP: ...!sun!altos86!rcollins HOME: (408) 225-8002 WORK: (408) 432-6200 x4356
Technical Details
Message-ID:
<4255@altos86.Altos.COM>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!apple!altos!altos86!rcollinsReferences:
<1990Oct9.212047.21053@infonode.ingr.com> <1990Oct10.001733.1299@thyme.jpl.nasa.gov> <2056@sixhub.UUCP> <1990Oct15.161015.417@thyme.jpl.nasa.gov>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!apple!altos!altos86!rcollins From: rcollins@altos86.Altos.COM (Robert Collins) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: 386SX capabilites Message-ID: <4255@altos86.Altos.COM> Date: 15 Oct 90 23:18:04 GMT References: <1990Oct9.212047.21053@infonode.ingr.com> <1990Oct10.001733.1299@thyme.jpl.nasa.gov> <2056@sixhub.UUCP> <1990Oct15.161015.417@thyme.jpl.nasa.gov> Reply-To: rcollins@altos86.UUCP (Robert Collins) Organization: Altos Computer Systems, San Jose, CA Lines: 22