IBM 5280 Distributed Data System - Index of

HexDisplacementLength inBytes (inHex)Description0203The low-order byte of the address (in the system controlarea) of the 4-byte lOB pointer for this partition.lOB Lockout:Bitrs)o 11-34-7MeaningKeyboard/display microprocessor is usingthis lOB. The main microprocessor cannotuse this lOB while this bit is on.System use only.When bits 4-7 are not 0, the main microprocessoris using the lOB.04060809222The keyboard/display microprocessor uses these 2 bytes tostore keyboard error codes. (Error codes are stored in 4-digit,zone-stripped format.)The absolute address of the next sequential instructionfollowing the command or operation issued to the keyboard/display microprocessor.The op code of the command currently being processed bythe keyboard/display microprocessor. When this byte = 00,no ENTR command is being processed.During the processing of the ENTR command, bytes 09 andOA contain the address (relative to the beginning of the partitionor to the beginning of the page that contains the globaltable) of the first byte in the screen format byte group that iscurrently being processed. Before the keyboard/display microprocessorbegins processing the ENTR command, bytes 09 andOA have the following meaning:Byte 9BitByte OAoMeaningScreen format control string is in thepartition.Screen format control string is in theglobal area.The table entry number of the screen formatcontrol string to be used for this ENTRcommand.Main Storage Data Areas 61