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- Path: sparky!uunet!mcsun!Germany.EU.net!unido!news.Hamburg.Germany.EU.net!easix!umunk!udo
- From: udo@umunk.GUN.de (Udo Munk)
- Newsgroups: comp.os.coherent
- Subject: Re: Info about coherent 4.0
- Message-ID: <9207261390@umunk.GUN.de>
- Date: 26 Jul 92 02:06:37 GMT
- References: <mdj.711867917@munagin>
- Organization: umunk (private)
- Lines: 55
- X-Newsreader: Tin 1.1 PL4
-
- mdj@mullian.ee.mu.OZ.AU (matthew douglas james) writes:
- : I was wondering if someone could give me some info about the
- : changes with 4.0. The two major issues I was wondering about
- : are:
- :
- : I heard that 3.x could only build 64k segments and
- : this was an impairment to building many standard UNIX
- : progs (incl ANSI C compiler)
-
- Right, 3.x can build 64k code + 64k data segments, 4.0 is a 32-bit
- flat address system. On a ISA bus system main memory is limited to
- 16MB because of the poor hardware design. Coherent 4.0 runs also
- on EISA bus, but not on MicroChannel. 4.0 comes without demand
- paging or virtual memory.
-
- : Support for SCSI, and IDE Hard disks - what's the
- : current situation
-
- Supported SCSI controllers: (only disks, no tapes)
- Adaptec AHA-1540A, 1542-A, 1540B, 1542-B
- Future Domain TMC-840/841/880/881/845/850/860/875/885
- Seagate ST01, ST02
- MYLEX DCE376DR EISA SCSI Adapter
-
- Supported IDE controllers:
- all other then Chicony 101B ???
-
- Of cause Coherent supports MFM and ESDI disk.
-
- : Any advice, or general comments pro/con would be appreciated.
-
- 4.0 is much closer to System V.
- 4.0 supports up to 32 serial ports.
- 4.0 supports virtual consoles with simultaneous color and mono sessions.
- 4.0 run 3.x and iBCS-compatible programs.
- 4.0 comes with pseudo terminal devices.
- 4.0 comes with 8-bit terminfo curses.
- 4.0 comes with a 386 *macro*-assembler.
- 4.0 supports large filesystems.
- 4.0 comes with enhanced DOS utilitys.
- 4.0 comes with a System V compatible cron.
-
- The disk I/O of 4.0 is much faster as with 3.x, because of a greatly
- enhanced system buffer cache. Fsck and cc runs more as twice as fast
- then with 3.x. Sorry, I can't give you exact time values, because
- I've only one system.
- This are the highlights, there is much more. I think everyone with
- a 386SX and 1MB memory at last should upgrade to 4.0. This is only
- my personal opinion.
- --
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