GE Dash 3000 Service Manual page 242

Ethernet Priority
Async Communication
Debug Monitor and Diagnostic LEDs
9-18
Assembly Drawings: Theory Of Operation
Ethernet communications are prioritized in the following order.
1. Top priority is the Peripheral Expansion interface
2. Next priority is the Hardwired Ethernet connection at the back of the
monitor.
3. Lowest priority is the optional Wireless LAN.
If none of the above exist, then the monitor is a stand-alone monitor.
Two asynchronous communication ports comply with the GEMMS
AutoPort protocol and are provided through an 8-pin RJ-45 connector
and the 20-pin peripheral interface described in the next section.
An integrated debugger operating in the debug mode within the main
processor provides basic emulator-like features such as modification of
register and memory locations and setting of breakpoints. The connector
required for this serial communication is a dual row 10-pin header. This
connector is located within the monitor and is not intended for field
service use. Tracing of instructions and logic analysis is provided by an
adapter board that connects to a socket installed on the main processor
board instead of the microprocessor.
Three diagnostic LEDs located along the front edge of the board are
provided for general purpose use and are under software control. The
LEDs interface directly to port A of the microprocessor. A flashing green
LED indicates normal monitoring operation.
Dash 3000/4000 Patient Monitor
2000966-339
Revision A