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- The work involved in doing an Executor for intel based hardware would have to be at least
- double the work of doing a motorola based implementaton. At least on the motorola box,
- you don't have to translate the machine code from one instruction set to the other. You
- only have to make sure the instructions are "safe". An intel port would require the creation
- of a virtual 68K machine on the intel world. Consider, for example, the fact that the 68K
- boxes have a larger more orthogonal register set that would have to be mapped into the
- intel register space. Also consider that all the bytes in an intel machine are stored in
- reverse order of that of a motorola box.
-
-
- In summary, the task of emulating a different OS is much simpler if the underlying
- processor maps to the emulated processor.
-
- Then again, I don't wor for ictv.com so they may have a totally different answer.
-
- <joe>
-
- Begin forwarded message:
-
- Errors-To: executor-request@ictv.com
- Errors-To: executor-request@ictv.com
- Errors-To: executor-request@ictv.com
- Sender: executor-request@ictv.com
- Precedence: bulk
- Date: Sat, 31 Oct 92 12:55 PST
- To: ICTV.COM!EXECUTOR@UNMVAX.CS.UNM.EDU
- From: ODCDRAG@MVS.OAC.UCLA.EDU
- Subject: Executor port to NeXTSTEP 486??!!
-
- Dear Mr. Matthews,
-
- I have been following the progress of your Executor project with
- much interest for some months, being on the NeXTmusic Mailing List.
- Congratulations on the progress you've made so far. I think that a high
- priority should be getting the SCSI and serial ports to work (unless
- you've already done that). However, another new development is on its
- way:
-
- I received email Oct. 14 from NeXT about the upcoming release of
- NeXTSTEP 486 v.3.0, and called them in Redwood City; they said that
- information about it would not be available until after the COMDEX
- conference, November 16-20 in Las Vegas.
-
- I am very much interested in both NeXTSTEP 486 and in finding out
- if you folks at the Executor project are intending to make Executor run
- under NeXTSTEP 486; since NeXT describes it as "a complete port of the
- NeXTSTEP 3.0 software environment to Intel-based computers, {with} the
- same User Interface, Development Environment, Applications, Networking
- (NFS, NOvell, Appleshare), state-of-the-art color, Mach UNIX, Display
- Postscript, 3D Renderman, etc.", it would seem that you should be able
- to make it work without too much trouble. Especially, the new operating
- system has object-oriented driver architecture that should greatly
- facilitate writing device drivers for the myriad peripheral cards in the
- IBM-compatible world.
-
- As the October 14 email from NeXT states, in order to set up a
- machine that has comparable performance to NeXT machines, one should
- assume that the Intel-based hardware is equipped with a complete set of
- high-performance peripherals, including 80486DX or DX/2 50 Mhz board
- with processor-direct graphics system, EISA backplane, 32 bit LAN, 32
- bit SCSI (-II), 16 bit sound, high-performance SCSI disk, etc. You
- folks at the Executor project should try to plan on your Executor port
- so that it includes capability to work with all of the above and more,
- if (as I hope) you do plan to port it. NeXT claims that "a specific
- NeXTSTEP 486 Hardware Compatibility Guide will be available in
- November"; I hope that doesn't mean Nov. 1993!
-
- NeXT claims that there will be a DOS 5.0/Windows 3.1 (including DOS
- "protected" mode/Win-16 mode) Compatibility Package that will enable
- several simultaneous DOS and/or Windows programs to run within NeXTSTEP
- windows, taking "full advantage of the 486 microprocessor"; Win-32 mode
- should be supported by mid-1993. When one combines that with possible
- Executor capability, one can begin to see the potentially vast
- versatility of such a machine.
-
- I'll look forward to your reply on these questions whenever you can
- get around to it. Thanks for all your good work so far!
-
- Robert Gaylord <ODCDRAG@MVD.OSV.UCLA.EDU>
-
-
-