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Grex > Micros > #99: I need help again!!! this time..it's motherboards...and ISA, EISA, and PCI! | |
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matts
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I need help again!!! this time..it's motherboards...and ISA, EISA, and PCI!
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Jul 10 06:14 UTC 1994 |
okay, i have a few questions about mother noards:
okay, iknow what local bus is *good job* but what is :
ISA?
EISA?
PCI?
and various combinations of the twho..
such as
ISA/PCI
EISA/VESA
etc?
what are the orders "from most powerfull to least"
and things tlike that..
there are great price differances...from ISA to EISA/VESA and things like that
i hope some one can help me...in this state of confusion...
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| 7 responses total. |
mkoch
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response 1 of 7:
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Jul 13 14:32 UTC 1994 |
well, I'm not going to explain what the acronyms stand for, but here is the
diffs: PCI is the fastest, most likely will be the most used in the years to
come. Cards for PCI are just a tad more expensive than VESA cards. Next best
is VESA, common, seems on the decline though. EISA is a faster version of ISA.
Which one to buy? Cost + future orientation: PCI/ISA got more dough?
PCI/EISA. Don't go for anything WITHOUT PCI or VESA though. Here is a good
one though (grin!) Associates Computer Supply (718-543-3364) sells a
Pentium-90 motherboard with ISA and VESA AND PCI, never again will you have
troubles. MIKE....
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mju
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response 2 of 7:
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Jul 13 21:16 UTC 1994 |
EISA is more than a "faster version of ISA". It supports 32-bit
transfers and 32-bit addressing, so cards on the EISA bus can actually
see all the memory in your PC, rather than just the first 16MB.
IMHO, the idea of a Pentium motherboard with an ISA bus is sort
of silly.
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mkoch
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response 3 of 7:
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Jul 20 16:53 UTC 1994 |
Why? The ISA bus has a sustained throughput of 3 megs/sec and is dirt cheap.
What is important is that you have PCI or VESA for devices that need a large
bandwith (video / SCSI), it doesn't matter if you stick your serial card in
an ISA slot, same for a soundcard.
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danr
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response 4 of 7:
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Aug 1 01:39 UTC 1994 |
Where did you get that figure? I've never heard anyone claim 3 Mbytes
per second sustained rate for the isa bus.
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mkoch
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response 5 of 7:
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Aug 2 16:18 UTC 1994 |
Hmm.. what was the figure you heard?
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danr
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response 6 of 7:
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Aug 3 11:17 UTC 1994 |
The figure I have is about half that.
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mkoch
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response 7 of 7:
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Aug 3 17:43 UTC 1994 |
In burst the bus is capable of 5 megs/sec, for 16 bits it should be around
3 megs/sec sustained, for 8 bits per cycle it should be half.. maybe that's
the diff? ?? Even if it is just 1.5 megs/sec sustained it's still enough
for many of the lower speed applications, such as serial I/O (which supp. is
going to change.. Access.bus, Serial SCSI, Firewire).
'
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