Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!apple!atncpc!bruce From: bruce@atncpc.UUCP (Bruce Henderson) Newsgroups: comp.sys.next Subject: Re: Mac emulator Summary: not even.... Message-ID: <345@atncpc.UUCP> Date: 15 Oct 90 16:41:01 GMT References: <2718c9b5.1722@petunia.CalPoly.EDU> Distribution: na Organization: Ashton Tate NCPC, San Jose, CA. Lines: 39 In article <2718c9b5.1722@petunia.CalPoly.EDU>, mdeale@spica.acs.calpoly.edu (Myron (the one in Calif.) Deale) writes: > > > In article aberno@questor.wimsey.bc.ca (Anthony Berno) writes: > >>>> I'm wondering if there has been any news about a mac > >emulator for the NeXT. I saw the post about the mac emulator > >a while ago, and was wondering if any progress had been made. > > > >matter the entire operating system, is entirely proprietary. > >Furthermore, the way Mac toolbox calls are executed (direct ROM > >addressing to the routines on the ROM chips) makes me doubt that it > > ... but, the '030 and '040 have Memory Management Units built > in which should enable you to keep the existing (logical) ROM addresses, > etc., while physically placing the executable anywhere. > Lots of other problems to solve though, I would guess. > Not to ruin anyones day.... But as a person who FORMERLY spent many years working on Mac software, some of it down in the nasty driver and system patch level, I need to inform you that the "Guts" of the macintosh (toolbox) are one of the largest hacks in the entire computer industry. When you boot system 6.0.5, much of the ROM has been patched out into RAM patches, and the whole thing is incredibly address dependant. Stuff in the system code blind jumps to locations in memorey, etc. And it has NO PROVISIONS for the '030 or '040 addressing scheme. I am actually quite sure that they software disable the '030 addressing at certian points in the ROMs, just so that thier screwey heap manager will work. Trust me, what we don't need is a Mac emulator, I left that crap behind for a good reason. If I wanted a mac, I would have paid my huge sum of cash to finance Sculley's mega million a year salary. If you want nice apps on the NeXT.... Go write some, please! Bruce Henderson Official Spud of the 1991 Bonsal Games