User manual

ATHENA CPU User Manual V1.40 Page 25
6. SYSTEM FEATURES
6.1 System Resources
The table below lists the default system resources utilized by the circuits on Athena.
Device Address (Hex) ISA IRQ ISA DMA
Serial Port COM1 I/O 3F8 – 3FF 4 -
Serial Port COM2 I/O 2F8 – 2FF 3 -
Serial Port COM3 I/O 3E8 – 3EF 9 -
Serial Port COM4 I/O 2E8 – 2EF 15 -
LPT Printer Port I/O 378 – 37F 7 3
IDE Controller A I/O 1F0 – 1F7 14 -
A/D Circuit (when applicable) I/O 280 – 28F 5 -
Watchdog Timer / Serial Port /
FPGA Enable/ Disable
I/O 25C – 25F - -
Ethernet OS-dependant OS-dependant -
USB OS-dependant OS-dependant -
Sound OS-dependant OS-dependant -
Video OS-dependant OS-dependant -
Table 16: System Resources
Note that most of these resources are configurable and, in many cases, the Operating System
will alter these settings. The main devices that are subject to this dynamic configuration are on-
board Ethernet, sound, video, USB, and any PC/104 cards that are in the system. These settings
may also vary depending on what other devices are present in the system.