Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!ut-emx!ccwf.cc.utexas.edu From: daveh@ccwf.cc.utexas.edu (David H. Huang) Newsgroups: comp.sys.apple2 Subject: Re: your opinion on RAM cards Message-ID: <46297@ut-emx.uucp> Date: 28 Mar 91 14:44:13 GMT References: <9103280243.AA18346@apple.com> Sender: root@ut-emx.uucp Reply-To: daveh@ccwf.cc.utexas.edu (David H. Huang) Organization: The University of Texas at Austin Lines: 25 In article <9103280243.AA18346@apple.com> JWANKERL@UTCVM.BITNET ("Josef W. Wankerl") writes: >Well the AE cards should be DMA - you are not DMA compatable over 4 meg >anyhow, so your card (since you got a rom 03) should probably only be >3 meg. Unless you use 1 meg as a RAM disk - but I don't know if that It's my understanding that all motherboard RAM is DMA compatible, and stuff in the memory expansion slot is DMA compat up to 4 megs, so on a ROM 1, you can have a total of 4.25 Megs DMA, and on a Rom 3, you can have 5.125 Megs DMA. >would work or not - I'm guessing it would as the RAM disk is generated >in high memory leaving the lower 4 for DMA. I have no ideas about the RAM disks are always put in high memory... >===> Josef W. Wankerl, Technical Editor for GS+ Magazine > BITNET: JWANKERL@UTCVM.BITNET | America Online: JWankerl > ProLine: jwankerl@pro-gsplus |-------------------------------- >Internet: jwankerl@pro-gsplus.cts.com | "I am a Viking" -Y. Malmsteen -- David Huang | "Calzoni Pizza: Internet: daveh@ccwf.cc.utexas.edu | Delivery in six UUCP: ..!ut-emx!ccwf.cc.utexas.edu!daveh | hours, or else your America Online: DrWho29 | pizza is cold."