Table 1-5. Technical Specifications (continued)

System Clocks

System clock . . . . . . . . . . . . . . 60 or 66 MHz (matches external processor bus speed)

Diskette/communications

ports . . . . . . . . . . . . . . . . . . . . 24 MHz from the system clock

Memory

Architecture . . . . . . . . . . . . . . 72-bit, noninterleaved

DIMM sockets . . . . . . . . . . . . eight

DIMM capacities . . . . . . . . . . 32 and 128 MB, EDO mode

Standard RAM . . . . . . . . . . . . 64 MB

Maximum RAM . . . . . . . . . . . 1024 MB (1 GB)

BIOS address . . . . . . . . . . . . . F000:0000h–F0000:FFFFh

Drives

Externally accessible bays . . . four 5.25-inch bays for half-height diskette drives, tape drives, or CD-ROM drives (one bay for a 3.5-inch diskette drive and one bay for a CD-ROM [standard])

Internally accessible bays . . . . six 1- to 1.6-inch-high SCSI hard-disk drives, hot-pluggable with an optional PowerEdge Expandable RAID Controller host adapter card

System Board Connectors

Externally accessible:

Serial (DTE) . . . . . . . . . . . two 9-pin connectors; 16550-compatible (UART)

Server Management

(serial) . . . . . . . . . . . . . . . . one 9-pin connectors; modem port for embedded server management

Parallel . . . . . . . . . . . . . . . one 25-hole connector (bidirectional)

Video . . . . . . . . . . . . . . . . . one 15-hole connector (on system board or add-in video card)

PS/2-style keyboard . . . . . one 6-pin mini-DIN

PS/2-compatible mouse. . . . one 6-pin mini-DIN

Internally accessible:

Diskette drive . . . . . . . . . . one 34-pin connector

Fan . . . . . . . . . . . . . . . . . . three 3-pin connectors

System Overview 1-25

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Dell 4100, 200, 180 service manual System Clocks