Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 (Tek) 9/28/84 based on 9/17/84; site azure.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!vax135!cornell!uw-beaver!tektronix!teklds!azure!michaelk From: michaelk@azure.UUCP (Mike Kersenbrock) Newsgroups: net.micro Subject: Re: Will the real Amiga stand up! Message-ID: <413@azure.UUCP> Date: Thu, 15-Aug-85 01:56:01 EDT Article-I.D.: azure.413 Posted: Thu Aug 15 01:56:01 1985 Date-Received: Mon, 19-Aug-85 07:36:46 EDT References: <1087@wucs.UUCP> Organization: Tektronix, Beaverton OR Lines: 33 > Questions > > 1: How much real ROM exists and what is in it. > > 2: How much RAM exists and how does the write protection work. (i.e. can the > size of the protected area be programmable) > I have no idea, but if I were them, it sure would be handy (during OS development) to have the OS in writeable memory (either in temporary added RAM or "mapped-in" using an in-circuit uP emulator (my employer makes very good ones (plug) which we use ourselves)). It will be interesting to see what version is the "production version" and to see if it stays that way. > MOST IMPORTANT QUESTION!!!! > 3: Is the memory data path 8 or 16 bits wide!!!!!!!! > > > Dale Frye @ Washington University in St. Louis The block diagram in Byte magazine showed seperate data busses for the (UVEP)ROM and the RAM with a bit of circuitry between them. Because the 68000 is 16-bit WORD oriented, and because you can use paging-mode tricks with DRAMs (you double-CAS the parts), you COULD make 8-DRAMs do a very decent job with word-accesses. Not having the Amiga schematic handy :-), I wouldn't know if they actually do this. Mike Kersenbrock Tektronix Software Development Products Aloha, Oregon