IBM System/370 145 Operating Procedures Manual
Also see for System/370 145: GuideOperating proceduresReference Summary
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• ADDRESS COMPARE SWITCH8~~~o~ofu~~~~~ooo~o ~~~oooo~~e~Q29_6~oo6~~6~~5 ~~l~~ooB66666P660~@tJ~ --@~ ::@-.-1=====;:(="""""=""=,0",::;;=".,,,,-;,,,;==-='==============tc:sl '\"'\"\"f:~~~@::"",@=..:~@~~~o~~~~~_~,/0 (§JB .ElS El OMM GADDRESS COMPAREAIF - DATA I' A@Y.STOIIE~~GIC 1bCOUNTER .110 REALAOIICTRLWOAD IADA. ·COUNHIIC"CWORO • • OATACOMPjADA TRAP TilAI'• This switch provides a match when the address used toaccess main storage matches the address set in consoleswitches CDEFGH, and the STORAGE SELECT switchis set to the MAIN STORAGE position.• The action taken by the CPU as a result of the matchcondition is determined by the ADDRESS COMPARECONTROL toggle switch.Customer UseAN Y (R eal Address)This position of the switch is used for normal programprocessing. With the switch in this position, a match occursfor main storage access when the storage address matchesthe address set in console switches CDEFGH.DATA STOREThis position allows a match when the storage addressmatches the address set in console switches CDEFGH duringa data store operation.I/O (INPUT/OUTPUT)This position of the switch allows a match when the storageaddress matches the address set in console switchesCDEFGH, and the operation is storing or fetching data foran I/O operation.I-COUNTER (Real or Logical Address)This position causes a match when the real or logical mainstorage uddress matches the address in console switchesCDEFGH, and the operation is an instruction fetch frommain storage.DATA COMPARE TRAPThis position is used to determine what instruction is caus-ing a particular storage byte location to be modified. Seethe data compare trap procedure.ANY (Logical Address)This position of the switch allows a match when the logical,main storage address used to access storage matches theaddress set in console switches CDEFGH.Service UseThe remaining positions are for service personnel and aredescribed in maintenance documentation.Console I ndicators, Switches, and Keys 15 |
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