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al.:so applies to the read tape backward instructions except that M - N will contain zeros if
exactly
N
words were read from a record on tape containing N words. M - N will contain the
2's complement of the difference (N - record length) with a 1 in position 18 if the number of
words contained in the record currently read is less than N. M - N will contain the increment
(record length - N) if the number of words in the record is greater than N.
Magnetic Tape Instructions
Operation
WTD
WRITE TAPE DECIMAL.
RTD
READ TAPE DECIMAL.
WTB
WRITE TAPE
BINARY~
RTB
READ TAPE BINARY.
Octal Code
OTOOOP
- CWl
2MMMMM - CW2
TNNNNN
- CW3
N decimal words from memory starting at location
Mare written on handler T.
Pis the plug number
of the tape controller.
OTOOOP
4MMMMM
TNNNNN
A maximum ,.of N decimal words is read by tape
handler T and placed in memory starting at loca-
tion M.
OT020P
3M MM MM
TNNNNN
N words of information from memory starting
at location M are written by tape handler T. Bits
18-1 are written on tape exactly as in memory.
OT020P
5MMMMM
TNNNNN
A maximum of N words is read by tape handler
T and stored in memory starting at location M.
[ID£u£~~uc:J ~@------------
V-46
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