The text read off it
[90.02.11]
- It is set by in-line coding preceding calls upon subroutines SYS)180 or SYS)182 (see calling sequences). The in-line coding which sets the cell will be one of three forms:
Case 1. When the data item is working storage
LDI CP)+NN
STI SYS)132
where CP)+NN will contain the location and byte of the data item.
Case 2. When the data item is located by means of a 'simple' Base Locator. (A simple base locator is defined as one that always has byte+0).
CAL BL)NN
ACL CP)+NN
SLW SYS)132
where CP)+NN is a constant of the form:
PZE WORD-DISPLACEMENT,,BYTE
Case 3. When the data item is located by means of a 'complex' Base Locator. (A complex base locator is defined as one that has Byte 0 to 5).
CAL BL)NN
ACL CP)+NN1 Displacement Constant
PDX 0,4
TXL *2,4,5
ACL CP)+NN2 OCT 777772000000
SLW SYS)132
SYS)133
PZE LOC,,BYTE
This cell points to the first word address (LOC), and the first BYTE(0-5) of the target field involved in a Move. The cell is set by calls upon subroutines SYS)179 or SYS)180 or by means of in-line coding of the same form as described under SYS)132.
SYS)134 This cell is set non zero whenever a floating point underflow results from a Move.
SYS)155 This floating point exponential routine raises the double precision number in the AC-MQ to the single precision power located in SYS)128. The double precision result is left in the AC-MQ.