On Tue, 3 Oct 2006, Teo Zenios wrote:
Another Ebay find came in today, a 486 EISA
motherboard and 5 cards.
The motherboards seems to be this model:
http://artofhacking.com/th99/m/U-Z/31111.htm , but I can't find a
company name on it anywhere. It has 8 EISA slots seems to be setup for a
486 DX. it looks like there are 2 DALLAS real time clocks on it, and the
machine complains the eisa config battery is low. Are there any cheap
hacks to get around this?
It might use NVRAM in the Dallas module, in which case you may just be
able to replace them outright.
The cards that came are the following (all EISA):
HP 10Mb and 100Mb network card has a HP/AT&T 100VG chip
I don't think that 100VG "AnyLAN" is compatible with 100Base ethernet.
ISTR it's a proprietary standard that's actually closer to token ring.
The 10Mb mode "should" be compatible with ethernet.
There are a number of 100BaseTX EISA adapters available. Try to find a
3Com 3c597 (I used all mine to upgrade networking on SGI Indigo 2 boxes
<g>).
Aview 2e Video card, 1MB VRAM
Adaptec AHA-2740 and AHA-2740A SCSI 50 pin (no floppy controller) SCSI cards
Mylex DAC960-1/2 caching controller card with what looks like 16MB
(maybe 4MB) of RAM installed (4x30 pin). The card has a nice big Intel
i960 chip (first one I have).
You have a DAC-960 EISA bus controller? I thought the DAC960s were all
PCI bus. Learn something every day!
When the machine boots I don't see any info on
what processor the system
has like you would normally see on a 486 system, and no BIOS screen for
the SCSI cards comes up either (not that there is anything connected to
them). The caching controller is odd looking because of the large SCSI
connectors ( there appears to be a 50 pin SCSI internal , and 2 68 pin
SCSI (one looks like a normal 50 pin but its long and has 68 pins, the
other looks like a 68pin connector on newer cards but the pin spacing
makes it look 3x longer). Is this a raid only card and do I need special
cables for the 68 pin connectors or are there adapters for these?
I never used an EISA machine before (one of the reason I snagged these)
and was wondering if there is anything special about them. Is there a
standard configuration utility for EISA cards or do you need to find one
for each card?
It's worse than that. You need the EISA setup _application_ specific to
the motherboard in _addition_ to the config files for each expansion
board. If you're lucky, perhaps the setup app for another brand of
motherboard using the same chipset will work.
Also since this machine is all EISA slots would
putting an ISA card in
one of them slow the BUS down? I need to find an EISA floppy and I/O
card to complete this, anybody have one they don't need?
It should be simple enough to find an Adaptec 2742 controller with onboard
floppy. As of last Spring, I routinely saw them in the "Free" or
"$1.00"
bins at flea markets.
And, no, an ISA card will not slow things down. You can likely install a
run-of-the-mill floppy IO card.
Steve
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