CP/M/CPM_CDROM.iso/mbug/mbug121.arc/INFO-CPM.ARK/INFO-CPM.003

Text File | 1988-08-07 | 27KB | 654 lines

 Received: from SIMTEL20.ARMY.MIL (TCP 3200000112) by MC.LCS.MIT.EDU 19 Sep 88
 04:23:37 EDT
 Date: Mon, 19 Sep 88 01:30:06 MDT
 From: [e-mail]
 Reply-To: [e-mail]
 Subject: INFO-CPM Digest V88 #207
 To: [e-mail]

 INFO-CPM Digest             Mon, 19 Sep 88       Volume 88 : Issue 207

 Today's Topics:
           Information on Digital Microsystem Microcomputers
                               Z-80 Unix?
 ----------------------------------------------------------------------

 Date: 17 Sep 88 23:36:54 GMT
 From: pacbell!unet![e-mail]  (Richard Childers)
 Subject: Information on Digital Microsystem Microcomputers

 In article <[e-mail]> [e-mail]
 ("JOE ST SAUVER,  686-4394 EXT 36", 503) writes:

 >I'd appeciate hearing from anyone with information about Digital Microsystem
 >microcomputers (Z80, CPM-based, 8" floppies), particularly information about
 >manuals or system software. Please reply directly by mail to [e-mail]
 >Thanks in advance, Joe St Sauver

 I'm not entirely sure how to address mail to BITNET, but I happen to have a
 DMS-3 at home, with 8" floppies and a full set of documentation. And I was
 thinking of taking a vacation in Oregon sometime soon, to check out some of
 the campuses up there. Maybe we can coincide. You can email me at :

         ucbvax!pacbell!unet!childers, or

         ucbvax!pacbell!vixie!childers, or

 call me at [phone], and maybe we can work something out. I'll try to
 call you, too.

 -- richard

 PS: Unfortunately, I'm not entirely certain as to which area code your phone
 number is in ...

 --
   "The leech's kiss, the squid's embrace,   ..!{amdahl,ames,oliveb,pacbell}!
    The prurient ape's defiling touch:        [e-mail]
    And do you like the human race ?
    No, not much."                        -- Aldous Huxley, 'Ape And Essence'

 ------------------------------

 Date: 18 Sep 88 02:09:12 GMT
 From: vsi![e-mail]  (Stephen J. Friedl)
 Subject: Z-80 Unix?

 In article <[e-mail]>, [e-mail] (Chris Rende) writes:
 > In his book "The Unix Operating System" Kaare Christian mentions that Unix
 > exists for the Z-80. This was a big suprise to me. I didn't know that Unix
 ran
 > on any 8 bit CPU's.
 >
 > Does anyone know anything about Unix running on a Z-80?

 My memory is a little fuzzy, but Morrow Designs [R.I.P.] had a
 banked Z80 box running a *v6* UNIX that I think was called `Micronix'.
 It must have been 1981-83, and they used v6 because they could
 make it fit in the limited memory.  I've no clue on performance
 or anything like that.

 Morrow was a God in the Z80 world but he stayed in it too long when
 the IBM PC came out :-(.
 --
 Steve Friedl    V-Systems, Inc.  [phone]    3B2-kind-of-guy
 [e-mail]     {backbones}!vsi.com!friedl    attmail!vsi!friedl
 ------------Nancy Reagan on conductance: "Just say mho"------------

 ------------------------------

 End of INFO-CPM Digest
 ******************************



 Received: from SIMTEL20.ARMY.MIL (TCP 3200000112) by MC.LCS.MIT.EDU 20 Sep 88
 07:19:58 EDT
 Date: Tue, 20 Sep 88 01:30:45 MDT
 From: [e-mail]
 Reply-To: [e-mail]
 Subject: INFO-CPM Digest V88 #208
 To: [e-mail]

 INFO-CPM Digest             Tue, 20 Sep 88       Volume 88 : Issue 208

 Today's Topics:
             New public domain archiving system development
                               Z-80 Unix?
 ----------------------------------------------------------------------

 Date: Mon, 19 Sep 88 09:53:38 EDT
 From: Don Malpass <[e-mail]>
 Subject: New public domain archiving system development

     How lucky we all are.  It's to be all things to all people,
 will probably be available tomorrow, and never have to go
 beyond Version 1.0000 because it will obviously have no bugs.
     Look folks, as has been pointed out here by many people, this
 flap and all this BS started long before there was even TALK of any law
 suit, because the issue was
       >>>>>>>>>>>>>>>> INCOMPATIBILITY <<<<<<<<<<<<<<<<
 with a format that was in such widespread use that it had, with good
 reason, become a de facto standard.  Unlike those who did a service by
 providing compatible but faster "products", PK had the lousy judgement
 to try to change the format rather than introduce a new standard to the
 world.  The code, even with the initial bugs, was fast enough to
 generate a following, and now we are all paying the price.
     There is NOTHING WRONG with all the .arc files out there except
 that tools may not have been provided [on UNIX, for example] for
 unpacking a few of the recent incompatible ones.  SO LET'S NOT PUT
 OURSELVES THROUGH ADDITIONAL SUFFERING BY CHANGING ALL THOSE FILES.
 Leave them alone, and when ALL the tools exist start adding new
 non-.arc files in the new format.  From the number and length of the
 wish-lists floating around that'll be a long time unless we want a
 slap-dash job that pleases almost nobody.  It will be much better if we
 allow the time for this project to be done professionally and not
 embrace it until the community is generally pleased with the results.
 Meanwhile, let's not continue to cut off our collective noses to spite
 our faces.  The number of hours we're all pissing away reading this
 continuing blurb-warfare could be better spent doing what we're being
 paid to do.
 ---
 Don Malpass   [[e-mail]],  [[e-mail]]
   My opinions are seldom shared by MIT Lincoln Lab, my actual
     employer RCA (known recently as GE), or my wife.

 ------------------------------

 Date: 19 Sep 88 14:05:32 GMT
 From: edsews![e-mail]  (Peter Zadrozny)
 Subject: Z-80 Unix?

 In article <[e-mail]>, [e-mail] (Chris Rende) writes:
 > Does anyone know anything about Unix running on a Z-80?

 Years ago I worked with a series of Cromemco computers,
 they where Z-80 S-100 based machines and ran Cromix as
 their operating system. Cromix was a pretty good implementation
 of Unix even with the limitations imposed by the CPU.
 The requirements were one 64K bank for the OS and
 one 64K bank for every user (process). The multi-tasking
 multi-processing was achieved by bank switching. It was interesting
 to be able to run WordStar and dBase II in a "Unix" environment
 (since it had a CP/M emulator which resided on the top 3K of the
 corresponding bank). More interesting was experiencing the
 power a 4MHz Z-80 handling with little visible effect one
 secretary hacking the keyboard with WordStar, one clerk
 running a dBase II application, and myself compiling little
 C monsters. They also had a very good Basic compiler as well
 as a Basic based OS (a la RSTS-11).

 I do believe that Cromemco is still in business (I saw somebody
 in the SF Usenix sporting a badge with their name). They are based
 in Mountain View. BTW, most of the computerized TV weather reports
 use Cromemco Z-80 machines.

 -----------------------------------------------------------------
  Peter Zadrozny            | UUCP:  ...!uunet!edsews!peter
  Electronic Data Systems    |        [e-mail]
  1400 N. Woodward Av.        | Voice: [phone]
  Bloomfield Hills, MI 48013 | Fax:   [phone]

 ------------------------------

 End of INFO-CPM Digest
 ******************************



 Received: from SIMTEL20.ARMY.MIL (TCP 3200000112) by MC.LCS.MIT.EDU 21 Sep 88
 06:21:45 EDT
 Date: Wed, 21 Sep 88 01:30:13 MDT
 From: [e-mail]
 Reply-To: [e-mail]
 Subject: INFO-CPM Digest V88 #209
 To: [e-mail]

 INFO-CPM Digest             Wed, 21 Sep 88       Volume 88 : Issue 209

 Today's Topics:
                        ET COMPUTER SYSTEMS 2010
                          Z-80 Unix? (2 msgs)
 ----------------------------------------------------------------------

 Date: 19 Sep 88 21:21:20 GMT
 From: [e-mail]  (Russell H. Farris)
 Subject: ET COMPUTER SYSTEMS 2010

 I just acquired a Z80-based machine with the name

          ET COMPUTER SYSTEMS 2010

 on the keyboard.  Unfortunately, there is no other identification
 visible.  I would appreciate any leads to documentation and/or a
 bootup disk.

 Russ Farris   ([e-mail])       [phone]

 ------------------------------

 Date: 19 Sep 88 15:14:05 GMT
 From: mailrus!uflorida!novavax!proxftl![e-mail]  (Mark Davidson)
 Subject: Z-80 Unix?

 Years ago, the C Users Group talked about a Z-80 Unix-like operating system
 in one of their newsletters. (I don't know about now, but back then, you got
 a copy of all the back-issues when you joined; that's where I saw it)
 Unfortunately, I don't think it was ever released, as the author of the
 system was killed in a swimming or boating accident (I think).
 --
   In real life: Mark E. Davidson       uflorida!novavax!proxftl!markd
   Proximity Technology Inc., 3511 NE 22nd Ave, Ft. Lauderdale FL, 33308
   #define STANDARD_DISCLAIMER          <Quote construction site>

 ------------------------------

 Date: 20 Sep 88 02:17:47 GMT
 From: xanth![e-mail]  (Robert Lee Bailey)
 Subject: Z-80 Unix?

 In article <[e-mail]> [e-mail] (Chris Rende) writes:
 >In his book "The Unix Operating System" Kaare Christian mentions that Unix
 >exists for the Z-80. This was a big suprise to me. I didn't know that Unix ran
 >on any 8 bit CPU's.
 >
 >Does anyone know anything about Unix running on a Z-80?
 >
 I, too, would be interested in Unix on a Z-80!  (In my dreams, right?)
 ~r
         Bob Bailey

 ------------------------------

 End of INFO-CPM Digest
 ******************************



 Received: from SIMTEL20.ARMY.MIL (TCP 3200000112) by MC.LCS.MIT.EDU 22 Sep 88
 06:49:03 EDT
 Date: Thu, 22 Sep 88 01:30:31 MDT
 From: [e-mail]
 Reply-To: [e-mail]
 Subject: INFO-CPM Digest V88 #210
 To: [e-mail]

 INFO-CPM Digest             Thu, 22 Sep 88       Volume 88 : Issue 210

 Today's Topics:
                          Z-80 Unix? (2 msgs)
                    z-80 unix and unix-"like" shells
 ----------------------------------------------------------------------

 Date: 20 Sep 88 16:29:33 GMT
 From: tektronix!orca!tekecs!frip![e-mail]  (Andrew Klossner)
 Subject: Z-80 Unix?

 []

     "Years ago, the C Users Group talked about a Z-80 Unix-like
     operating system in one of their newsletters. (I don't know
     about now, but back then, you got a copy of all the back-issues
     when you joined; that's where I saw it) Unfortunately, I don't
     think it was ever released, as the author of the system was
     killed in a swimming or boating accident (I think)."

 This was the MARC system (I think that's the name ... elapsed time
 isn't good for brain cells).  Scuttlebutt at the time had it that, upon
 the fellow's death, one of his acquaintances, a Los Angeles area
 consultant, swooped in on the grieving widow and talked her into
 selling him exclusive rights to the work in progress.  He then spent
 years getting it in shape on a part-time basis, issuing periodic,
 tantalizing "it's almost done" notes to the net, until an un-backed-up
 hard disk crashed and all was lost.

 (The "swooping" part is single-source rumor.  The rest is confirmed.)

   -=- Andrew Klossner   (decvax!tektronix!tekecs!andrew)       [UUCP]
                         ([e-mail])   [ARPA]

 ------------------------------

 Date: 20 Sep 88 16:44:15 GMT
 From: oliveb!intelca!mipos3!cadavr![e-mail]  (Doug Braun ~)
 Subject: Z-80 Unix?

 In article <[e-mail]> [e-mail] (Chris Rende) writes:
 >In his book "The Unix Operating System" Kaare Christian mentions that Unix
 >exists for the Z-80. This was a big suprise to me. I didn't know that Unix ran
 >on any 8 bit CPU's.

 I wrote one a couple of years ago.  It is a totally from-scratch implementation
 of the Unix kernel for a 64K CP/M machine.  It runs just fine on my machine,
 being able to support the 7th edition shell with no problems. I would be
 glad to mail the source code or post it to the net.

 It works like this:  The kernel is in the top 32K, and a process exists
 in the bottom 32K.  Process switching happens by total swapping.  This
 arrangement is like the "Mini-Unix" that Bell Labs put out for the smallest
 PDP-11's a while back.

 Virtually all of the 7th Edition system calls, and most of its functionality
 are implemented.  Here are the restrictions that I remember offhand:

 The debugger system call does not exist (but profiling does exist).
 The TTY driver is bare-bones and supports only one TTY.
 Inode numbers are 16 bits, so there can be only 32 Meg partitions.
 The seek system call uses the old 6th Edition arguments (no 32 bit arguments)
 The time and stime system calls use the MS-DOS format for times.
 Because of the total swapping, disk I/O is synchronous.  There is no point
 running another process while one waits for disk I/O, since you would
 have to swap it in.  The locks and semaphores needed to implement this are
 also not present.

 On the bright side, everything else seems to work fine.  Execve, fork, wait,
 etc., all work correctly.  The number of processes is limited only by table
 sizes (and your patience).  Links, pipes, random file access, owner, and
 group permissions work correctly.  The 4.2BSD stdio library was ported
 to the system.

 This was written to run on my custom-built hardware.  There is no hardware
 memory management, just custom disk, tape (9-track!!), and serial I/O
 hardware.  Of course, the system supports major and minor devices and
 character and block device tables, so adding in new drivers is not too
 hard.

 The kernel was completely written by me, but unfortunately I cannot legally
 distribute the shell, ed, cpp, tar, and 15 or so other utilities I ported
 to this system.  It was compiled by the Q/C compiler (under CP/M) along
 with a ported version of cpp.  Also, I was never able to get the C
 compiler to fit in 32K, but cpp, a patched version of the M80 assembler,
 and a linker written by me all run under the system.  I also wrote
 some utilities such as fsck and ps that are very kernel-dependent.
 Most of the Minix programs would probably port to this system, though.

 If anybody would like to look at this stuff, let me know, and I will
 dig out the disks and figure out how to upload them.

 Doug Braun                Intel Corp CAD
                     408 765-4279

  / decwrl \
  | hplabs |
 -| oliveb |- !intelca!mipos3!cadev4!dbraun
  | amd    |
  \ qantel /

 ------------------------------

 Date: 20 Sep 88 22:00:52 GMT
 From: well![e-mail]  (Andrew Scott Beals)
 Subject: z-80 unix and unix-"like" shells

 Let's clear things up.  There are three general classes of
 objects that people are talking about:

     * Unix-like shells (CCP replacements)
     * Unix-like operating systems (ground-zero efforts)
     * Unix ported to the z80

 Of the first class, Unix-like shells, there are any number, of which,
 CNIX and MicroShell come to mind.  These allow you to do i/o redirection,
 type multiple commands on a line and do "pipes" (not real pipes as the
 programs are executed sequentially).  These make using your CP/M
 programs a bit more palitable, as the CCP is pretty ugly.

 The second class are microcomputer operating systems designed to look
 and feel somewhat like Unix.

 Mark Davidson mentioned an effort which was described to the C User's
 Group a number of years ago.  This was the Marc operating system -
 unfortunately I don't remember the name of the gentleman who did most
 of the work on it, but when he died (due to an accident), Lauren
 Weinstein (yes, that Lauren) took over the project for a while, but
 decided to retire it when it simply got too big to run on the micros of
 the day (this was around 1981).

 Another effort in the unix look-alike class is the Cromix operating
 system from Cromemco.  Yes, they're still in business and they still
 maintain a uucp site.  They make postings every once in a while.
 I'm not sure that Cromix runs on a z80, but I have heard that it
 does.  Cromix also runs on Cromemco's 68000 machines and a port was
 done to the Amiga by a gentleman who lives in the Great Northwet -
 when he was down here during the summer he told Cromemco about it,
 but I don't know what they thought of it.  He just re-wrote the i/o
 drivers to get it working in glass-tty mode (no windowing system).

 As to real live Unix for the z80, after Morrow Designs did their
 MPU80 board, Unisoft did a v7 port (perhaps v6?) to that cpu.  The
 MPU80 provides a number of features lacking in the z80, namely
 memory mapping, decent arithmetic, kernel&user modes and instruction
 traps.  User-mode processes aren't allowed to do (this is from
 memory) i/o instructions or halts - the kernel is called whenver
 a user process attempts such an instruction.  With the additional
 hardware, a z80 starts to look like an 8-bit PDP-11.

 For those of you with a yen to hack, you also might want to consider
 doing a Minix port to your machine - if it has sufficient memory
 and can map memory easily enough.
 --
 Andrew Scott Beals             Ridu dum tiam vi povas, simiulo-knabo!
 [e-mail] or {pacbell,lll-crg,hoptoad,hplabs,apple}!well!bandy

 ------------------------------

 End of INFO-CPM Digest
 ******************************


 Received: from SIMTEL20.ARMY.MIL (TCP 3200000112) by MC.LCS.MIT.EDU 23 Sep 88
 07:28:56 EDT
 Date: Fri, 23 Sep 88 01:30:15 MDT
 From: [e-mail]
 Reply-To: [e-mail]
 Subject: INFO-CPM Digest V88 #211
 To: [e-mail]

 INFO-CPM Digest             Fri, 23 Sep 88       Volume 88 : Issue 211

 Today's Topics:
                   Amstrad PCW public domain software
                         Outdated Cp/M machines
                               Z-80 Unix?
                                 Z80MU
 ----------------------------------------------------------------------

 Date: Tue, 20 Sep 88 13:15 N
 From: <[e-mail]>
 Subject: Amstrad PCW public domain software

 Wanted: Amstrad PCW public domain software.

 I am looking for Amstrad PCW specific implementations of XMODEM and/or MEX.
 Can anyone tell me which files to download from SIMTEL20 in order to get
 these programs up and running on the PCW.

 I am also interested in documentation on implementing GSX drivers for
 other peripherals than those supported by the standard system software.
 More specific: I want to change/rewrite DDHP7470.PRL, the plotter driver,
 so that it produces HPGL-files instead of controlling the plotter directly.

 Thanks in advance,

 Harry Stox,

 [e-mail]

 ------------------------------

 Date: 21 Sep 88 05:54:29 GMT
 From: unmvax!charon!ariel.unm.edu![e-mail]  (Mike Reisch
 (Number VI))
 Subject: Outdated Cp/M machines

     I have just picked up a Sony SMC-70 micro with 2 3.5" drives and
 CP/M vs 2.2.  Anybody know anything about this machine (such as what support
 is still around for it...).  Much thanks..

                             Mike
                         [e-mail]

     "Gotta run, people to go, places to see..."

 ------------------------------

 Date: 20 Sep 88 01:45:52 GMT
 From: vsi![e-mail]  (Stephen J. Friedl)
 Subject: Z-80 Unix?

 In article <[e-mail]>, [e-mail] (Mark Davidson) writes:
 >
 > Years ago, the C Users Group talked about a Z-80 Unix-like operating system
 > in one of their newsletters. (I don't know about now, but back then, you got
 > a copy of all the back-issues when you joined; that's where I saw it)
 > Unfortunately, I don't think it was ever released, as the author of the
 > system was killed in a swimming or boating accident (I think).

 I am digging *way* back here, but I think this was the Mark
 operating system.  I think the name was Ed Zeimba [??], a friend
 of Leor Zolman (creator of BDS C).  I don't think it was ever
 finished :-(.

      Whatever happened to Leor?

     Steve
 --
 Steve Friedl    V-Systems, Inc.  [phone]    3B2-kind-of-guy
 [e-mail]     {backbones}!vsi.com!friedl    attmail!vsi!friedl
 ------------Nancy Reagan on conductance: "Just say mho"------------

 ------------------------------

 Date: Thu, 22 Sep 88 09:20 EDT
 From: GREID <@WPAFB-AAMRL.ARPA:GREID@FALCON>
 Subject: Z80MU

 I am trying to run the CPM emulator Z80MU on a Zenith Z-180 Laptop and I am
 having trouble determining what is needed in the AUTOEXEC.Z80 file.  The
 Z80MU.DOC file isn't much help.  I would appreciate any suggestions concerning
 the appropriate contents of this file.  Without it or with an "empty"
 AUTOEXEC.Z80 I get a BDOS error.

      Also, does anyone know of a CPM terminal program that does a VT 100
 emulation.  Vt 52 is as good as I can find and our VAX has some features that
 are only usable with a VT 100.

     Gary Reid
     [e-mail]

 ------------------------------

 End of INFO-CPM Digest
 ******************************



 Received: from SIMTEL20.ARMY.MIL (TCP 3200000112) by MC.LCS.MIT.EDU 24 Sep 88
 05:46:03 EDT
 Date: Sat, 24 Sep 88 01:30:36 MDT
 From: [e-mail]
 Reply-To: [e-mail]
 Subject: INFO-CPM Digest V88 #212
 To: [e-mail]

 INFO-CPM Digest             Sat, 24 Sep 88       Volume 88 : Issue 212

 Today's Topics:
                           CPM-Kermit needed
                           Kaypro 10 for sale
                         kaypro robie computer
                       NEC PC-8500 RAM Cartridges
                               Z-80 Unix?
 ----------------------------------------------------------------------

 Date: 23 Sep 88 00:45:49 GMT
 From: [e-mail]  (Peter M. Wenzel)
 Subject: CPM-Kermit needed

 I need to transfer some files from two H/Z machines to an IBM machine.  Is
 anyone able to send me CPM-Kermit in the following formats, as I have no way
 to download them to the old Zeniths:

      * Z120, 48 TPI, CPM
      * Z90,  96 TPI, CPM

 I will reimburse for diskettes and postage.  Also, is there any market for
 used machines like the ones above?

 Thanks for any help you can give me.

            ___
         __/   \   _
        / _     \_/ \__^__/\_/-\               Pete Wenzel
       | | |     ---PMWenzel---->              Caltech 1-60
       | |_|     ==============/               Pasadena, CA 91126
        \__     / @CITRomeo.Bitnet             [phone]
           \___/ @Juliet.Caltech.Edu

 ------------------------------

 Date: 20 Sep 88 22:13:27 GMT
 From: cadnetix.COM!cadnetix![e-mail]  (Rusty)
 Subject: Kaypro 10 for sale

 In article <[e-mail]> [e-mail] () writes:
 >For Sale: KayPro 10 portable computer
 >...lots of stuff deleted, since the next article notes you are not supposed
 .... to advertise here....<
 >Price:
 >   only $475.00 with bag

 Boy, I sold MINE in the nick of time.  About 1 1/2 years ago I sold
 my K10 for $900.  Bought a 286 machine for $1000.  Glad I did not keep
 mine.  Just wish there was a media program for MS/DOS which could read
 K10 disks!
  ----
 Rusty Carruth   UUCP: {uunet,boulder}!cadnetix!rusty  DOMAIN:
 [e-mail]
 Cadnetix Corp.  [phone]x296 \  5775 Flatiron Pkwy. \ Boulder, Co 80301
 Radio: N7IKQ    'home': P.O.B. 461 \  Lafayette, CO 80026

 ------------------------------

 Date: 23 Sep 88 19:33:26 GMT
 From: ukecc![e-mail]  (Wayne Beech)
 Subject: kaypro robie computer

 I am doing some work for a computer that uses kaypro robie computers running
 cpm 2.2.  i am familiar with cpm (i have a cpm system myself) but i am
 having trouble finding diskettes for this computer....they are drivetec
 format and hold 197 tracks per inch.  does/has anyone else used one of these
 computers?

 ------------------------------

 Date: Thu, 22 Sep 88 12:30:33 EDT
 From: Roger Link <[e-mail]>
 Subject: NEC PC-8500 RAM Cartridges

 I have recently purchased a NEC PC-8500, and am looking for a
 source for the PC-8407A 128K RAM cartridges. Any source leads or comments
 on how well the cartridges work would be appreciated. Does anyone have
 schematics / BIOS source / IO mapping of this machine. Also I was
 wondering if the 8500 can be placed in the CP/M 64K mode when using
 the 128K RAM cartridge?

                                         Roger Link
                                           [ LINKR @ VTVM1.BITNET ]
                                         Physics Electronics Shop
                                         Blacksburg Va 24061

 ------------------------------

 Date: 23 Sep 88 18:36:00 GMT
 From: steinmetz![e-mail]  (William E. Davidsen Jr)
 Subject: Z-80 Unix?

 In article <[e-mail]> [e-mail] (Rex A. Buddenberg)
 writes:

 | 2.  What are implications for the follow-on Z-80 derivative chips
 | like HD64180 and Z-280?  How portable are we here?  If you can make
 | things work in a 64k RAM space, life ought to get easier if you can
 | lay hands on more RAM...  Somehow sounds like an awkward fit though
 | until you get hardware memory management to take a lot of the load off
 | your code...muse,muse,muse.

   I hacked CP/M to live in an alternate memory bank (actually I ran it
 in the 2nd bank and had a faker in the main memory). Using that
 technique you could get more memory for UNIX and possibly run a lot more
 of it. That would allow you to have multiple processes, too, since there
 would be virtually no swap overhead. I don't know about i/o, I can't
 think of any *cheap* way to do it into an unselected bank.
 --
     bill davidsen        ([e-mail])
   {uunet | philabs}!steinmetz!crdos1!davidsen
 "Stupidity, like virtue, is its own reward" -me

 ------------------------------

 End of INFO-CPM Digest
 ******************************