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Operating a Serial CIM
194
On Line Mode
WhenyouoperateAUATCinOnLineMode,themainscreenarea
displaysyourinteractionswiththeASCIIdevice,asifitwerethescreen
ofanASCIIterminal.Simultaneously,thedatastreambeingoutputby
thedeviceisstoredinaneightpagecircularbuffer,soyoucannotonly
accessandop
eratethedevice,butyoucanalsoreviewitshistoricaldata
asneeded.Becausethebufferiscircular,italwaysretainsthemostrecent
eightpagesofdatafromthedevice;thenewestdatawilloverwritethe
oldestdata.