NEC DIRECTION SP B - SERVICE MANUAL 1998 Service Manual page 97

A-2 System Specifications
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1-Mbit by 64 or 1-Mbit by 72 (8-MB DIMM)
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2-Mbit by 64 or 2-Mbit by 72 (16-MB DIMM)
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4-Mbit by 64 or 4-Mbit by 72 (32-MB DIMM)
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8-Mbit by 64 or 8-Mbit by 72 (64-MB DIMM)
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16-Mbit by 64 or 16-Mbit by 72 (128-MB DIMM).
Read-Only Memory (ROM)
Flash ROM 2 Mbit
Window RAM (WRAM)
Standard video memory
Calendar Clock
Year/Month/Day/Hour/Minute/Second/.01 Second; maintained by battery backup
Battery Type Real Time Clock (RTC) battery
Input/Output (I/O) Facilities
Integrated Industry-Standard Interfaces
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Parallel bidirectional, ECP/EPP support; one 25-pin connector
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Serial two high-speed RS-232C ports using 16C550-compatible UARTs,
supports transfer rates up to 115.2 Kbits per second; 9-pin connectors
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Universal Serial Bus (USB)
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
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Mouse PS/2 compatible, 6-pin connector (mini DIN)
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IDE dual IDE channels
two fast IDE channels
CD-ROM drive and hard disk on separate channels
support for up to 33 MB/second 32-bit transfers on PCI bus
support for a total of four IDE devices; 40-pin connectors
support for PIO mode 3 and mode 4, multiword DMA2, Ultra DMA33
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Diskette Drive
4 MB video memory on the video board
two USB ports, support two USB peripherals
PS/2-compatible, 6-pin connector (mini DIN)
supports two devices, 34-pin connector