Read/Record D and E
Constants and instructions: 1) can be entered from the keyboard directly into registers E and
D; 2) can be recorded from only registers E and D onto a card; or; 3) read from a card only
into registers E and D, without affecting the contents of other program registers. This
technique can be utilized most effectively for the creation and use of subroutine or module
programs.
1.
1 To enter instructions from the keyboard directly into registers E and D, completely by-
passing instruction registers 1 and 2, and storage register F:
Turn computer ON;
Touch GENERAL RESET;
Turn RECORD PROGRAM switch ON (in);
Turn PRINT PROGRAM switch ON (in);
Enter, in order, the instructions that comprise the subroutine or modular program;
The instructions will be received first by E, then e, than D, then d (if the maximum
capacity of 48 instructions are utilized).
2.
If the information in the D and E registers is to be recorded onto a magnetic card:
BOTH the RECORD PROGRAM switch and the PRINT PROGRAM switch must be ON (in);
Insert magnetic card;
The transfer of information will be from the D and E registers of the memory to the
program card.
3.
If the contents of a card are to be read only into the D and E registers: The PRINT
PROGRAM switch is tumed ON (in) and the program card is inserted: Information is read
into the D and E registers exclusively;
The contents of the other registers are unaffected.
To Print a Program
Once a program has been recorded on a magnetic card, the entire sequence of instructions
forming the program can be printed out. This is normally used to analyze a new program to
insure correct entry, or to locate an error in the program.
1.
To locate the initial instruction of a program, insert the program card.
2.
Turn PRINT PROGRAM ON (in); touch the Print key (0).
3.
The computer will print the instructions in their programmed sequence.
4.
The computer will stop at each Stop (S) instruction. To continue the printing of the
instructions, touch the Print key (
).
5.
When the entire program has been printed, turn PRINT PROGRAM OFF (out). To locate an
error within a program, after the Error light has gone on, follow steps 2 through 5 above.
This prints. the instructions from the present location in the program. The ihstructiofl
immediately preceding the first printed instruction caused the activation of the Error light.
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