IBM 5280 Distributed Data System - Index of

Hex Length inDisplace- Bytes (inment Hex) Description00 8 Program Name (eight EBCO IC characters that identify theprogram in this partition).0809Partition length in number of 256-byte blocks minus 1.Control Flags:Bit(s)o 112-7MeaninglOB is initialized (a program is loaded).Keyboard is attached to this partition.System use only.OAControl Flags:Bit(s)o 1123-67MeaningTracing through a Call or Return instruction,to or from the common function area.System use only.Processing a newly invoked Cmd, C keysequence. (Waiting for keystroke after theCmd and C keys have been pressed.)System use only.Waiting for a response (ENTR) for theglobal load prompt.DBDC00DEOF10 2Main microprocessor error code.System use on Iy .High-order part of the program start address.Absolute program start address. Used by the microprocessorwhen returning from a common area subroutine.System use only.Points to the next instruction to be executed when themicroprocessor begins executing code in the partition.When the microprocessor begins executing code in this partitionfor the first time, it adds the value in byte 00 of thislOB to this address to make it an absolute address. Themicroprocessor then updates this address before leaving thepartition.Main Storage Data Areas 51