LEVEL 1 DIAGNOSTICS ERROR RETURNSWhere, ww = Detail codexx = Expected data from registeryy = Observed data from regiserDetail code:10 Failed read/write to mask registerRepair Procedure 14Check the bus connections to the 8259 InterruptController IC.DETAIL CODE 10Suspect 8259 (U25XU132*) data bus to processorconnection; check data bus. The 8259 may beinternally damaged resulting in intermittentfailure; replace U25 (U132#).INTERVAL TIMER (8253) TESTFormat of code:CONTROL:0 3 :ww Date TimeEXP DATA: xxxx, OBS DATA: yyyyWhere, ww = Detail codexxxx = Expected data from registeryyyy = Observed data from registerDetail code:1x Failed counter read/write testx = counter 22x Timer too fastx = counter 0,1,23x Timer too slowx = counter 0,1,25x No output from timer 0x = counter 1,2Repair Procedure 15DETAIL CODE 1xSuspect intermittent failure of the 8253 timer5-48
