IBM System/7 Functional Characteristics - All about the IBM 1130 ...

Reset 5024The reset 5024 resets the printer and reader status words in the controller, stops anycycle steal operations that might be in progress, and conditions the controller toaccept commands from the user program. If the module address (MA) is not zero a programcheck occurs. The instruction has the following format:0 4 8 15 26 31O 0 0 0 11111Reg1 0 1 0 0 0 0 010 0 0 0 0 0 0 0 0 0111111111MA0 0 0 0 0 011111O 0 0 0,0 0 0 0,1 0 0 0,0 0 011111111111111Contents of registerspecified in reg fieldController InitializationThe 5024 controller must be initialized before a programmed device operation is initiatedif one or more of the following conditions have occurred:• The 5024 power is applied• After a system reset• After a Reset 5024 command• The 5024 is varied off-line and then back on-line.The 5024 is initialized with information contained in six data tables. The information inthese data tables will vary with machine configuration and circuit logic level. The tablesare provided with each 5024 and are updated when the configuration or circuit logic ischanged. The customer engineer will provide the updates to these tables.It is the user's responsibility to initialize the 5024 using the data tables, or to ensurethat a compatible level of MSP/7 5024 support is used.IOTB SequenceThe initialization is accomplished by a sequence of six IOTB's. One IOTB is defined foreach data table. The output diagnostic/initialize controller command, a user defined statusand data address, a fixed constant, and a variable word count are used in each IOTB. Theconstant and word count are obtained from the data tables. Each data table must end witha hex D7FB.The following is an example of an IOTB initialization seqeunce:IOTBCommandWordStatusAddressConstantWordCountDataAddressTable 1 5000 XXXX OCE8 0008 AAAATable 2 5000 XXXX ODAO 0030 BBBBTable 3 5000 XXXX OF02 000F CCCCTable 4 5000 XXXX OFCO 001\1 DDDDTable 5 5000 XXXX OFFO 0006 EEEETable 6 5000 XXXX OD9A 0002 FFFFUserDefinedUserDefinedIf an improper sequence of IOTB's or incorrect data tables are used the results will beunpredictable.