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Prometheus CPU User Manual V1.44 Page 26
8. SYSTEM I/O
8.1 Ethernet
Prometheus includes a 100Mbps Ethernet connection using 100BaseT wiring. The signals are
provided on a 6-pin header J4 on the bottom edge of the board.
Diamond Systems’ cable no. 698002 mates with this header and provides a standard RJ-45
connector in panel-mount form for connecting to standard Cat5 network cables.
1 Common
2 RX-
3 Common
4 RX+
5 TX-
6 TX+
J4 – Ethernet Connector
The Ethernet chip is the National Semiconductor DP83815 MacPhyter chip. It is connected to the
ZfX86 CPU via the board’s internal PCI bus. It resides at address 1000 and uses IRQ 10.
The Prometheus Software CD includes Ethernet drivers for Windows 95, Windows 98, Windows
NT, and Linux. The latest drivers can also be downloaded from National Semiconductor’s website
at www.national.com. Search for DP83815 to reach the product folder.
A DOS utility program is also provided for testing the chip and accessing the configuration
EEPROM. Each board is factory-configured for a unique MAC address using this program. To run
the program, you must boot the computer to DOS. The program will not run properly in a DOS
window inside of Windows. In normal operation this program should not be required.