Hercules-EBX CPU User Manual V1.02
Page 50
8. SYSTEM I/O
8.1 Ethernet
Hercules-EBX includes a 10/100Mbps Ethernet connection using Cat-5 (100BaseT) wiring. The
signals are provided on two connectors: a vertical RJ45 connection (J10) or 6-pin header (J11) on
the right edge of the board.
For applications where the on-board RJ45 might be inaccessibly or inconvenient, Diamond
Systems’ cable no.
698002
mates with the 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+
Table 31: J11 – Ethernet Connector
The Ethernet chip is the National Semiconductor DP83815 MacPhyter chip. It is connected to the
system via the board’s internal PCI bus.
The Hercules-EBX 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 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.
Additional software support includes a packet driver with software to allow a full TCP/IP
implementation.
8.2 Serial Ports
Hercules-EBX contains 4 serial ports. Each port is capable of transmitting at speeds of up to
115.2Kbaud. Ports COM1 and COM2 are built into the standard chipset. They consist of standard
16550 type UARTs with 16-byte FIFOs.
Ports COM3 and COM4 are derived from an Exar 16C2850 dual UART chip and include 128-
byte FIFOs. Ports 3 and 4 may be operated at speeds up to 1.5Mbaud with installation of high-
speed drivers as a custom option.
The serial ports use the following default system resources:
Port Address
range
IRQ
COM1
I/O 3F8 – 3FF
4
COM2
I/O 2F8 – 2FF
3
COM3
I/O 3E8 – 3EF
4
COM4
I/O 2E8 – 2EF
3
Table 32: COM PORT Default Resource Listing
