1. xerox 560 computer system - The UK Mirror Service

2 3 4 Meaningo 0 I/o address not recognized, HIO not accepted,and no status i nformati on returned togeneral registers.o No I/O address recognized and HIO abortedbecause an error detected when the lOP attemptedto read and transfer the HIO parameters(device/device controller address andR field information) from the BP to the lOP.No status information returned to generalregisters.If CC4 = 1, the MIOP is in the test mode and the meaningof the condition code during an HIO is:2 3 4 Meaningo 0 0 Unit is performing an Order Out operation.ooo 0ooUnit is performing an Order In operation.Unit is performing a Data Out operation.Processor Interface detected parity error onreturned status and/or condition code. Theresult of the HIO is indeterminate.Unit is performing a Data In operation.BCF detected while unit performing a DataIn operati on.RF~FT TNPIIT /()IITPIIT0N~~d i~de~ '~Iig~~e~i, t privileged)contains either a BP, MIOP, and/or-RMP). Unit addressesX 101_X 15 1 may be assigned to processors within the cluster.Unit address X'5 1 in cluster XIO I is reserved for the BP. Unitaddress X'6 1 is assigned always to the MI and unit addressX?I is assigned always to the PI for all clusters.Status information is returned only in the condition codebits. The R field is not used.Affected: CC1, CC2, CC3Condition code settings are as shown below:2 3 4 Meaningo 0 0 - I/O address recognized.POLPo -I/O address not recognized.POLL PROCESSOR(Word index alignment, t privileged)POLL PROCESSOR causes the addressed unit to return unitfau I t status in bi ts 16-31 of reg i ster Rtt. Th i s status i nformationis unit dependent (see Appendix C, Table C-1).In addition to the operation code of X'4F' I bits 15, 16,and 17 must be coded as 010, respectively.Affected: (R), CC1, CC2, CC~Condition Code settings are as shown below:RESET INPUT/OUTPUT causes the selected lOP to generatean I/O reset signal to all devices attached to it. In additionto the operation code X'4F', bits 15, 16, and 17 mustbe coded as 001, respectively.An RIO instruction resets the selected unit in the samemanner as ZCRIO on the operator's control console. However,unlike the control command, the RIO instructionresets only the addressed unit and may be controlled bythe executing program. Since the BP may be addressed asan lOP, it wi II accept an RIO instruction that causes theBP to reset itself in the same manner as ZCRBP. (Note thatthis procedure is not normal practice.)C luster addresses (CA), bit positions 18-20, may have valuesof XIOI_X?I. Cluster addresses X'0'-X ' 6 1 may be assignedto any cluster containing processors (i .e., BP, MIOP, and/or RMP). In a monoprocessor system, cluster address XIO Iis assi.gned to the c luster containing the basic processor(BP). Cluster address X?I is assigned only to the clustercontaining a system processor. If CA equals X?I I the UAfield is reserved. Unit addresses (UA), bit positions 21-23,may have values of XIOI_X?I. Unit addresses are requiredonly if the cluster address is X'0'_X '6 1 , (i.e., cluster2 3 4 Result of POLPo 0 0 - Processor fault interrupt not pending.o 0 - Processor fault interrupt pending.POLRo ~Unit address not recognized.POLL AND RESET PROCESSOR(Word index alignment, t privileged)POLL AND RESET PROCESSOR causes the selected unit toreturn unit fault status in bits 16 to 31 of register Rtt andresets the unit's fault status register. This status informationis unit dependent (see Appendix C, Table C-1).tSee footnote to HIO instruction.ttThis fault status is duplicated in bits 0 to 15 of register R.Input/Output Instru ctions 139