- Page 1: Systems Reference Library IBM Syste
- Page 6: efficient switching from one progra
- Page 15: The program may have zeros in the b
- Page 18: Supervisor or Problem State: In the
- Page 22 and 23: ead into main storage and used as c
- Page 25 and 26: Instructions The fixed-point arithm
- Page 27 and 28: Programming Note All combinations o
- Page 29 and 30: Resulting Condition Code: o 1 Diffe
- Page 31 and 32: divide exception exists, and a prog
- Page 33: Program Interruptions: Specificatio
- Page 39: If the first operand field is too s
- Page 42 and 43: called the first operand. The secon
- Page 44 and 45: The sign bit of the second operand
- Page 46 and 47: In short-precision, the low-order h
- Page 48 and 49: acteristic is less than zero. The c
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In the SI format, the second operan
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Shift Riglht Double SRDI. RS 8e 7 8
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In these formats Rl specifies the a
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PSW is the address of the instructi
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unning state may be achieved by the
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The following is a summary of the p
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Read Direct RDD 51 85 78 15 16 1920
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I nterru ptions The interruption sy
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Input/Output Interruption The 1/ ()
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The contents of bit positions 8-15
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Transfer of information to and from
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Termination of the I/O operation no
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the device on the control unit is f
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Channel Not Operational (NXX): The
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age in a descending order of addres
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Programming Note Command chaining m
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nel fails to accept a byte on an in
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Input / Output Interruptions Input/
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The fields in the csw are allocated
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channel end, control end, or device
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Content of Channel Status Word The
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the condition responsible for the t
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Initial Program Loading Initial pro
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The key is effective only while the
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Assume: Reg 12 Reg 15 Loc 2006-2010
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The following are sample normalized
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Appendix E. Hexadecimal-Decimal Con
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0 1 2 3 4 5 6 7 8 9 A B C D E F AOO
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RS, SI FOl'mat xxxx 0000 0001 0010
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The operation is suppressed, except
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Decimal Overflow (OF) Exponent Unde
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Alphabetic List of Instructions NAM
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Set Program Mask SPM RR L 04 Load (