American Megatrends 64 Series, Руководство пользователя

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American Megatrends 80486 Baby EISA Motherboard User's Guide
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Step 9 Install Adapter Cards,
Continued
EISA Expansion Cards
EISA adapter cards have longer and denser fingers on the edge connecters
than ISA adapter cards. The EISA expansion slots on the motherboard have
two rows of contacts, one below the other. An ISA (AT-Compatible)
Adapter Card can be inserted into the EISA connector only far enough to
make contact with the upper row of contacts. EISA adapters have longer
fingers to allow contact with the second row of contacts. See the
following graphic.
When installing EISA adapter cards, make sure that they snap in twice
and are fully seated into the EISA slot. If the card makes contact only
with the upper row of contacts, it cannot function properly.