Table of Contents
Advertisement
MAIN STORAGE DISPLAY (Single Instruction Operations)
The following procedure may be 'lsed to display main
storage data between execution of single instructions. The
processor-controller must be in a stopped condition before
starting this procedure.
1.
Position the mode switch to SI.
2.
Press START repeatedly to step program to point at
which data display is desired.
3.
Record address in I-register. This address is needed to
return to next instruction in program.
4.
Enter address of main storage location to be displayed
in data entry switches.
5.
Position mode switch to LOAD.
6.
Press LOAD I.
7.
Position mode switch to DISPLAY.
8.
Press START. The selected data is now displayed in
B-register indicators.
9.
To display other main storage locations. repeat steps 4
through 8. To resume program, continue with step 10.
10.
Enter address recorded in step 3 in data entry switches.
11.
Position mode switch to LOAD.
12.
Press LOAD I.
12.
Position mode switch to RUN.
14.
Press START.
MAIN STORAGE DISPLAY (Single Cycle Operations)
To display main storage data between single cycle operations,
use the following procedure. The processor-controller must
be in a stopped or wait condition.
1.
Position mode switch to
sse.
2.
Press START repeatedly until desired cycle of
instruction is reached.
3.
Perform steps 3 through 14 of preceding procedure.
MAIN STORAGE LOAD
To manually load data into main storage, the following
procedure is recommended. The processor-controller must
be in a stopped or wait condition.
1.
Enter main storage address at which data is to be
stored in data entry switches.
2.
Position mode switch to LOAD.
3.
Press LOAD
1.
4.
Enter data to be stored in data entry switches.
5.
Press START. The data in the data entry switches is
stored in main storage at address contained in
I-register. The I-register is then incremented by one.
6.
Repeat steps 4 and 5 until all data has been entered.
IBM 1801/1802
Processor~ontroller
13
Advertisement
Table of Contents
