home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!spool.mu.edu!umn.edu!kksys.com!edgar!brainiac!lmt!mg.lmt.com!markg
- From: markg@county.lmt.mn.org (Mark Gilbert)
- Subject: Re: Arguments Against Local Bus? (Was: Local Bus, what is it?)
- Message-ID: <markg.10.716177879@county.lmt.mn.org>
- Sender: usenet@lmt.mn.org
- Nntp-Posting-Host: mg.lmt.com
- Organization: LaserMaster R&D, Minneapolis, MN USA
- References: <1992Sep09.014838.22919@gibdo.engr.washington.edu> <1992Sep09.131756.11565@zeos.com> <1992Sep9.205549.20736@proton.llumc.edu>
- Date: Fri, 11 Sep 1992 02:17:59 GMT
- Lines: 42
-
- In article <1992Sep9.205549.20736@proton.llumc.edu> borodin@hope.llumc.edu (Sergi Borodin) writes:
- >From: borodin@hope.llumc.edu (Sergi Borodin)
- >Subject: Re: Arguments Against Local Bus? (Was: Local Bus, what is it?)
- >Date: 9 Sep 92 20:55:49 GMT
-
- >In article <1992Sep09.131756.11565@zeos.com> kgermann@zeos.com (Ken Germann) writes:
-
- >!> I have pretty much decided on getting a 66DX2 vesa-local-bus system,
- >!> but before I do, I'd like to hear some arguments against it. What
- >!> are some of the drawbacks of a local bus? Wouldn't a 32-bit video card,
- >!> a SCSI controller and an Ethernet card all the same bus cause some
- >!> problems?
-
- >!There will be timing issues that need to be addressed. They are
- >!simpliefied with only having two Local Bus Slots.
-
- > How come? Two slots put twice as much load on bus drivers,
- >besides the capacitance of two slots will also be two times
- >bigger. And if we'd count the capacitance of the traces, and
- >all that at 33-50 Mhz.. You gotta be kidding.
- >I understand that "Zeos" might be offering moms with
- >two local bus slots, but ...
-
- > Since CPU can't address two slots simultaneously I don't see
- >(do you? tell me) why (despite commercial interest) two slots
- >could cause better performance.
-
- >!--
- >!Ken Germann ZZZZ EEEE OO SSS ZEOS International, Ltd.
- >!support@zeos.com INET Z E O O S Technical Support Dept.
- >!uunet!zeos!support UUCP Z EE O O SS 530 5th Ave N.W.
- >!800-228-5390 VOICE Z E O O S St. Paul, MN 55112
- >!612-633-7337 ZZZZ EEEE OO SSS FAX 612-633-4607
-
- > Sergei Borodin
- > Design Engineer
-
-
- Having more local bus slots allows the CPU to access more devices at CPU
- speeds instead of ISA or EISA bus speeds.
-
- Mark Gilbert
-