IBM 5280 Distributed Data System - Index of

Diagnostic operations are used for reading or writing data in diskette microprocessoror adapter registers. (These registers are not the decimal or binary registers used inan application program.) If A is specified when writing registers, the data to bewritten is taken from the binary register specified by bits 24-31. If A is specifiedwhen reading registers, the data that is read is placed into the binary register specifiedby bits 24-31. If A is not specified when writing registers, the data to bewritten is taken from bits 24-31. If A is not specified when reading registers, thedata is read into bits 24-31.Bits 16-31 have the following meaning:BitsMeaning1617ooRead registerWrite registerDiskette microprocessor registerAdapter register18-1920-2324-3100 = Diagnostic command0 Register 161 Register 172 Register 183 Register 194 Register 205 Register 216 Register 227 Register 238 Register 249 Register 25A Register 26B Register 27C Register 28D Diskette microprocessor register 13 1E Diskette microprocessor register 25 1F Diskette microprocessor register 26 1Binary register address if option A is specified; immediate data ifoption A is not specified.I These specifications always indicate a diskette microprocessor register regardless of what bit17 indicates.196