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Specifications,
Continued
System BIOS
The Enterprise-IV EISA VLB motherboard uses a customized AMIBIOS system BIOS with a built-in Setup
configuration utility and hard disk drive utilities. Via AMIBIOS Setup, you can configure up to two user-
definable hard disk drive types. You can easily configure systems with no video monitor, keyboard, or
floppy disk drives in STANDARD CMOS SETUP.
CMOS RAM
The Enterprise-IV has 50 bytes of standard ISA CMOS RAM to store system configuration data. ISA
CMOS RAM, the real time clock, and the battery are on the Dallas DS1387 CMOS RAM/RTC chip. The
Enterprise-IV EISA VLB motherboard also includes an additional 4 KB of EISA Extended CMOS RAM.
Built-in Battery
The Enterprise-IV EISA VLB motherboard uses a Dallas DS1387 CMOS RAM chip with a built-in battery.
Math Coprocessor
Enterprise-IV motherboards equipped with an 80486SX support an optional Intel 80487SX math
coprocessor.
Expansion Slots
The Enterprise-IV has seven 32-bit EISA expansion slots. Six of these expansion slots are EISA bus
mastering slots. The other two slots are VL-Bus bus mastering slots. The VL-Bus and EISA slots also can
be used for 16-bit ISA adapter cards.
Enterprise-IV EISA VLB Motherboard User's Guide
7
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