DEC DECstation 5000 Model 100 Series, Maintenance Manual, Page: 251 / 269

Video RAM Test
The video RAM test performs a read/write operation on the
video RAM. To run the video RAM test, type x02, where x
represents the graphics module unit number, and press Return.
Video RAM test parameters and error codes
Table F-61 describes the parameters used in video RAM test
error messages. Table F-62 lists error codes used in video RAM
test error messages.
Table F-61. Video RAM Test Parameters
Parameter Description
P1 Debug flag setting
P2 Test’s starting address
P3 Test’s ending address
P4 Data pattern in test’s fourth pass
P5 Expected pattern from memory
P6 Actual pattern read from memory
Table F-62. Video RAM Test Error Codes
Error Code Description
1 Error during write loop.
2 Values in memory miscompared.
3 Complemented values in memory miscompared.
Test Commands and Messages Produced by Version PDE3 ROM Chips F–45