NEC POWERMATE ES 5250 - Calendar Clock; Input;Output (I;O) Facilities

System Specifications B-3
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DIMM speed must match or exceed processor bus speed
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Memory module type — gold-plated, non-parity, SDRAM
modules
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Expansion — supported in 32-MB, 64-MB, 128-MB, and
256-MB DIMMs
Flash ROM — 2 Mbit
Calendar Clock
Year/month/day/hour/minute/second/.01 second; maintained
by battery backup module
Battery type — Lithium coin cell
Input/Output (I/O) Facilities
Industry-standard interfaces integrated on system board:
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Parallel — bi-directional, ECP/EPP support; one 25-pin
connector
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Serial — two high-speed RS-232C ports using 16550
UART, support transfer rates up to 115.2 KB per second;
9-pin connectors
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Universal Serial Bus (USB) — two USB ports, support
two USB peripherals directly to the system; with
appropriate connector, each port supports up to 127 daisy-
chained devices; supports 12 megabits (Mbs) per second
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Keyboard — PS/2-compatible, 6-pin connector
(mini DIN)
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Mouse — PS/2-compatible, 6-pin connector (mini DIN)