Psion Teklogix Vehicle-Mount Computer 8590 - Manual (Page 131)

8580/8590 Vehicle-Mount Computer User Manual 105
Chapter 7: Serial Ports
Serial Ports
7.1 Serial Ports
By default the 8580/8590 is equipped with 4 serial ports. COM1 and COM2 are
accessible from the outside. COM3 and COM4 are used internally for
communication with the environment controller and the touch controller.
7.1.1 Resources
Resources for the serial ports are pre-defined in the system architecture and
automatically managed by the BIOS. The resources for COM1, COM2, COM3 and
COM4 can be defined via the BIOS.
The standard resources for serial ports are:
7.1.2 COM1 Options
The following section describes what needs to be observed when using the COM1
port to supply power to external equipment.
The resources required for the COM1 controller module are automatically reserved
by the BIOS.
7.1.3 COM1 As A Power Supply
The COM1 port can optionally supply externally connected equipment with +12 V
or +5 V of power. The voltages are protected by internal fuses which limit the total
consumed current to 1.1 A at 5 V (including keyboard and mouse). The current
consumption at 12 V is also limited to 1.1 A by a reversible fuse. Depending on the
specific system configuration, the maximum current consumption at +12 V may be
significantly lower.
7.1.4 Serial Port Printers
Printers with a serial port can be connected to the 8580/8590.
7.1.5 Serial Port Bar Code Scanners
To activate the integrated scanner software wedge under Windows XP Embedded:
COM1 Address 0x3F8 - 0x3FF (hexadecimal), Interrupt IRQ4
COM2 Address 0x2F8 - 0x2FF (hexadecimal), Interrupt IRQ3
COM3 Address 0x3E8 - 0x3EF (hexadecimal), Interrupt IRQ10
COM4 Address 0x2E8 - 0x2EF (hexadecimal), Interrupt IRQ11