DEC DECstation 5000 Model 100 Series, Руководство по обслуживанию

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Graphics Module Tests
The following entries explain each individual graphics module
test and its test commands and error messages.
Initialize Video Digital to Analog Converter Registers Test
The initialize video digital to analog converter (VDAC) registers
test attempts to initialize the VDAC registers. To run the
initialize VDAC registers test, type x01, where x represents the
graphics module’s unit number, and press Return.
Initialize VDAC registers test parameters and error codes
Table F-59 describes the parameters used in initialize VDAC
registers test error messages. Table F-60 lists error codes used
in initialize VDAC registers test error messages.
Table F-59. Initialize VDAC Registers Test Parameters
Parameter Description
P1 Debug flag setting
P2 Contents in VDAC register
P3 VDAC low address register
P4 VDAC high address register
Table F-60. Initialize VDAC Registers Test Error Codes
Error Code Description
1 Could not initialize read id register.
2 Could not initialize command registers.
3 Could not initialize cursor command registers.
4 Could not initialize cursor RAM.
5 Could not initialize color map.
6 Could not initialize overlay map.
7 Could not initialize cursor palette.
8 Could not initialize interrupt line.
F–44 Test Commands and Messages Produced by Version PDE3 ROM Chips