home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!cs.utexas.edu!swrinde!mips!sdd.hp.com!wupost!gumby!destroyer!ubc-cs!mprgate.mpr.ca!mcvey
- From: mcvey@mpr.ca (Iain McVey)
- Newsgroups: comp.arch
- Subject: Re: Request Info Re Bus Trends & Intel 486s
- Message-ID: <1992Jul28.180350.9917@mprgate.mpr.ca>
- Date: 28 Jul 92 18:03:50 GMT
- References: <id.TJRR.XR8@ferranti.com> <TOMW.92Jul25174038@orac.esd.sgi.com> <id.SLUR.RBG@ferranti.com>
- Sender: news@mprgate.mpr.ca
- Organization: MPR Teltech Ltd., Burnaby, B.C., Canada
- Lines: 36
-
- In article <id.SLUR.RBG@ferranti.com> peter@ferranti.com (Peter da Silva) writes:
- >> I think the important word here isn't "better", it's "cheaper." With
- >> motherboard, it's easier to put your system in a smaller box, use less
- >> board space, and fewer connectors. All that adds up to lower production
- >> costs.
- >
- >This is true for systems that are essentially single-board-computers with
- >expansion slots, like the Amiga 3000 or the typical Mac. In the PC world,
- >though, you almost always have at least one or two cards in every system
- >shipped: so you're using as much board space and as many connectors as a
- >backplane design... plus making upgrades harder and more expensive.
-
- I think it interesting that the motherboard has come full circle.
-
- Remember the PC with its main memory and processor on the motherboard,
- with peripherals such as serial and parallel ports and video adpaters on
- expansion cards.
-
- Now if you look inside a PS/2 model 95 et. al. you see that the
- processor is on a card, the memory is on a card, and now the peripherals
- have become part of the motherboard - built in serial, parallel, video,
- mouse, etc.
-
- It seems that the motherboard in this case has become a backplane, with
- the bus controller and basic services on that backplane.
-
- If there is too much overhead in the connections to the backplane, then
- is it not a problem with the method of connection, not the idea of
- connection?
-
- - Iain -
- --
- Iain McVey (mcvey@mprgate.mpr.ca) | - Now auditioning for a new .sig
- Software Designer | - Entrys must be posted no later
- MPR Teltech Ltd. | than next thursday.
- 8999 Nelson Way, Burnaby, BC | - no agents, please.
-