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2.2 The IBM 7171 ASCII Device Attachment Control Unit - Index of

2.2 The IBM 7171 ASCII Device Attachment Control Unit - Index of

2.2 The IBM 7171 ASCII Device Attachment Control Unit - Index of

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D/SPD I RESERVEDMDTo 2 3 4 5 6EBCDICBITField Description0,1 Value determined by contents <strong>of</strong> bits 2-7. See following figurefor hexadecimal values.2 o = Unprotected1 = Protected3 o = Alphameric1 = NumericNote: Bits 2 and 3 equal to 11 causes an automatic skip. Seetext.4,5 00 = Display/not CURSOR SELECT key detectable.01 = Display/CURSOR SELECT key detectable10 = Intensified display/CURSOR SELECT key detectable.11 = Non-display, non-print, non-detectable.6 Reserved7 Modified Data Tag (MDT): identifies modified fields duringRead Modified command operations.o = Field has not been modified1 = Field has been modified by the operator. Can also be setby program in data streamFigure 6-13. Field Attribute Character Bit Assignment6-22 <strong>IBM</strong> <strong>7171</strong> Reference Manual and Programming Guide

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