LEVEL 1 DIAGNOSTICS ERROR RETURNSRIM WALKING ONES TESTFormat of code:MEMORY: 05:00ADDR; ssss:ooooEXP DATA: xxxx, OBS DATA:yyyyWhere, ww = Detail codessss = Segment address of erroroooo = Offset addressoferrorxsxx = Expected datayyyy = ObservedDetail Code:00 ALWAYS ZERORepair Procedure 04The RAM Walking Ones test writes walking one and zeropatterns in memory, then reads the patterns back toverify that all data bits are functioning properly.This test is more extensive than the pattern test,with the exception that intermittent errors are notchecked ,ROM CHECKSUM ERROR TESTFormat of code :MEMORY :04:00EXP DATA: xx, OBS DATA: yy'Where, xx = Expected checksumyy s Calculated checksumDetail code:NONERepair Procedure 05Make certain that the EPROM BIOS IC (shown In Figure5-14 and 5-15, respectively, is correctly insertedin its socket (U 1 3 (Ü1 18). If the ROM CHECKSUM ERRORstill occurs replace the EPROM BIOS IC, Should the5 - 2.2
