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- From: ltchean@rambutan.iss.nus.sg (Lim Thye Chean)
- Subject: Re: AVATAR
- Message-ID: <1992Nov10.022743.2648@nuscc.nus.sg>
- Sender: usenet@nuscc.nus.sg
- Reply-To: ltchean@iss.nus.sg (Lim Thye Chean)
- Organization: Institute of Systems Science, NUS, Singapore
- References: <1992Nov9.080339.3421@nuscc.nus.sg> <1992Nov9.203733.558@exu.ericsson.se>
- Date: Tue, 10 Nov 1992 02:27:43 GMT
- Lines: 122
-
-
- Here is the information I get it from my friend. I have not sign any
- non-disclosure agreement, so I am free to say anything.
-
- Enjoy the following article, and I am sure many of you will like it if it
- ever come out. Yes, I might buy one for myself too, but I think it is a
- little expensive.
-
- ------------------------------------------------------------------------------
-
- Well, I just finished listening to the tape of Bill's KansasFest
- session one more time, and while I was listening I quickly typed up as much
- information from it as I could. Here it is (please excuse any typo's, etc.):
-
- Main System:
- o 1 Central CPU (65816) at 10MHz
- o Memory map of Apple IIGS (with some differences)
- o DMA: 10 Megawords a second
-
- Video Processor:
- o TMS34010 (considering 34020 and 34030, depending on cost)--considering
- 25 or 50Mhz
- o 1024*768 16-bit video (maximum)
- o In "true" Apple II modes, it will grab the appropriate memory locations
- (for example, E12000 for SHR) and use software translation on the fly to
- display the screen
-
- Audio Processor:
- o 65265 with 512K RAM
- o Tied directly to an Ensoniq chip (hopefully a 16-bit chip bit, but if
- they can't make it work, then they will return to the 5503 that is in
- the GS, but with 128K RAM)
- o The 65265 can play sound without any main processor degradation
- o The 65265 has a 65816 core with two serial ports: One port will go to
- a MIDI port, the other to a mouse port (standard IBM style mouse)
- o Audio is stereo
- o Currently, only one application can "talk" to the sound chip (they are
- trying to work around this problem) [if you are writing software and
- the program will use the sound sparingly, don't just start up the sound
- manager at the beginning. Instead, when you are ready to play a sound,
- check if the sound manager is busy, if its not, start it, play your
- sound, and then shut it down]
-
- Disk Processor:
- o Controls CD-ROM (not built-in to the basic system), IDE AT-class IBM
- hard drive (also optional), and floppy disks (IBM 3.5" HD drive--
- circuitry in controller can read GCR, MFM, and Amiga GCR--the machine
- can read and write to Macintosh, Apple II, MS-DOS, Atari ST, and Amiga
- disks)
- o 512K of RAM
- o Software will be written to make it act essentially like a RAMFast in
- the way it operates. Emulates a SmartPort. Loads data into its cache
- memory, or can use DMA to load into a subprocessor or program memory
- o Controls two bidirctional serial ports (one modem, one printer, but
- basically just generic serial ports) and an IBM connector-type parallel
- board
-
-
- Subprocessors (Optional):
- o 65816 with memory (looking at 4Mb).
- o All Avatar-aware software (most GS applications that use Toolbox and
- don't draw directly to the screen) can be placed in a subprocessor
- along with a Toolbox "kernel"
- o Can offload as many programs into separate 65816 (or 65265) processors as
- you have available (i.e., if you have 2 subprocessors, you can run the
- Finder in the main processor that comes with Avatar, then AppleWorks GS
- in another, and PaintWorks Gold in another, all of them running full
- speed) (The audio and disk subprocessors cannot be used for this)
- o All subprocessors will be about the size of a credit card--a processor,
- its RAM and a little GLU circuit that emulates all things that can't be
- done through a kernel.
- o Possible subprocessors: 80x86, 68x00
- o For instance, if you had a 80x86, you could run Lotus 1-2-3 in a window
- on the screen (at full-speed)
- o If a work-alike operating system can be made for the Macintosh, then Mac
- software can be run
- o Current design allows 16 subprocessors (expandable to 65536)
- o Made arrangements already to have these cards built
- o Currently, Apple IIe software must run on main processor only
-
- Notes:
- o Investigating virual memory (but it is currently very problematic)
- o Goal of prototype by February and developer's versions by next
- KansasFest (probably only with Laser 128 ROMs, but will have a
- kickstart disk that will have an image of the ROM as they update it)
- o The two main subprocessors will have 4Mb of memory as will the main
- 65816 (but the main 65816 can be expanded since its memory is in SIMMs)
- o Each subprocessor can imitate only one type of computer at a time (from
- what he said, the 65816 processors could run either GS software or
- Commodore 64, but only one at a time)
- o Investigating ways of allowing different programs to run at different
- frame speeds (like 7 frames/sec for Lotus 1-2-3 and 40 frames/sec for
- Wing Commander)
- o Currently looking at Sony and NEC CD-ROMs that have proprietary ports
- that aren't SCSI, so they will be about $50 less than the average SCSI
- CD-ROM. Supports playing audio, etc.
- o Projected cost - $999 will have one 3.5" floppy drive, keyboard, mouse,
- two subprocessors (the 65265s for audio and disk) (no hard drive, no
- monitor)
- o Subprocessors will cost around $30 each
-
- Slots:
- o First system will have 4 slots (later models will have 8)
- o IBM AT compatible (with some modifications)
- o They will write drivers for SCSI, ethernet, and IDE cards
- o Slots will have 64K of address space (first at E8/0000, second at
- E9/0000, third at EA/0000, etc.)
-
- System software:
- o Written by Jawaid Bazyar and others
- o GS/OS-like operating system
- o Designed with multi-tasking in mind
-
- -----------------------------------------------------------------------------
-
- Have a nice day.
-
- --
- %% GS Lover Loves GS %% Author of Super Magic 3 & Mandelbrot II GS
- %% and Avatar too. %%
- Lim Thye Chean: Lim is my surname. My name is Thye Chean.
- My address: LTCHEAN@ISS.NUS.SG, or 9, College Green, Singapore 1129
-