Hercules III User Manual Rev A.2
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Page
39
10.2
Serial Ports
Hercules III contains six serial ports. Each port is capable of transmitting at speeds up to 115.2Kbaud. All ports
are from the SCH3116 Super I/O chip.
The serial ports use the following default system resources.
Port
I/O Address Range
IRQ
COM1
0x3F8
4
COM2
0x2F8
3
COM3
0x3E8
6
COM4
0x2E8
7
The COM1 and COM2 settings may be changed in the system BIOS. Select the
Advanced
menu, followed by
I/O
Device Configuration,
to modify the base address and interrupt level.
The addresses of COM3 and COM4 are fixed. The IRQ settings for COM3 and COM4 are fixed.
10.3
USB Ports
Four USB 2.0 ports, USB0 through USB3, are accessible using cable assemblies attached to connectors J21 and
J22. USB5 is available on J23.
USB support is intended primarily for the following devices (although any USB-standard device should function).
•
Keyboard
•
Mouse
•
USB Floppy Drive (This is required for Crisis Recovery of boot ROM)
•
USB flash disk
The BIOS supports the USB keyboard during BIOS initialization screens and legacy emulation for DOS-based
applications.
The USB ports can be used for keyboard and mouse at the same time that the PS/2 keyboard and mouse are
connected.