• Two serial ports with full modem control and the parallel port
• The keyboard and mouse interface
• CIRRUS VGA controller
• The speaker interface
• PCI-to-PCI bridge chip set (PPB)
• PCI-to-EISA bridge chip set
• EISA system component chip
• Time-of-year (TOY) clock
• Connectors:
– EISA bus connectors (Slots 1 and 2)
– PCI bus connectors (Slots 11, 12, and 13–before the bridge)
– PCI bus connects (Slots 1, 2, 3, and 4–behind the bridge)
– Memory module connectors (20 SIMM connectors)
– CPU daughter board connector
5.4 EISA Bus Options
The EISA (Extended Industry Standard Architecture) bus is a 32-bit industry
standard I/O bus. EISA is a superset of the well-established ISA bus. EISA was
designed to accept newer 32-bit components while remaining compatible with
older 8-bit and 16-bit cards.
EISA offers performance of up to 33 MB/sec for bus masters and DMA devices.
Two EISA or ISA modules can reside in the EISA bus portion of the card cage.
All slots are bus master slots. EISA slots can be filled in any order.
Warning: For protection against fire, only modules with current-
limited outputs should be used.
5–26 System Configuration and Setup
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