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Download TECHNICAL SERVICE MANUAL
Transcript
USING PANEL TO DIAGNOSE AN ERROR A peripheral CRT and keyboard can be connected to the workstation using an RS-232-C crossed cable assembly. (See the Peripherals Hardware Manual, Section 4, "Additional IWS Peripherals Hardware," subsection, "RS-232-C Serial Interface.") The CRT should be set up to be 300 baud even parity. The Panel debugger program can be entered by pressing the space bar (20h), the carriage return (0Dh), or the ESCAPE key (1Bh) on a dumb terminal. NOTE If the error code is 40h (boot timeout), the space bar entry to Panel debugger must be performed within five seconds after the error code is displayed, or the ROM program will continue trying to bootstrap. The 8086 register CX is set up to contain the error code before Panel debugger is entered. If the error is a memory error, information related to the error is contained in registers DS, DI, SI, and BP, as follows: Register CX DS DI SI BP Contents Error code Segment base address of memory error Offset address of memory error Data written to memory Data read back from memory 10-2
