GE 235 System Manual page 69

T a p e M o v e m e n t Instructions
The RTD, RTB, RTS, RBD, RBB, RBS, RWD, WTD, WTB, WTS, and WEF tape movement instruc-
tions a r e preceded by the SEL P instruction to designate the specific controller channel number.
Mnemonic Operand Index Time Description
Oper. Code Address Word
-
Microsec.
BKW
T 36 BACKSPACE AND POSITION WRITE HEAD. The tape
on tape handler T i s backspaced one record and i s
positioned f o r reading o r writing. This instruction
must be preceded by the SEL P instruction and i t
cannot be modified.
RBB
(blank)
T 36 READ BACKWARD BINARY. N words a r e read f r o m
tape T backward in Binary Mode into memory, starting
a t location A.
RBD
(blank)
T 36 READ BACKWARD DECIMAL. N words a r e read from
tape T backward in binary coded decimal mode into
memory, starting a t location A.
RBS
(blank)
T 36 READ BACKWARD SPECIAL BINARY. N words a r e
read f r o m tape T backward in special binary mode,
starting at location A.
RTB
(blank)
T
36 READ TAPE BINARY-FORWARD. N words a r e read
from tape T forward in binary mode into memory,
starting a t location A.
T 36 READ TAPE DECIMAL- FORWARD. N words a r e read
RTD
(blank)
from tape T forward in binary coded decimal mode into
memory, starting at location A.
RTS
(blank)
T 36 READ TAPE SPECIAL BINARY-FORWARD. Nwords
a r e read f r o m tape T forward in special binary mode,
starting a t location A.
RWD
36 TAPE REWIND.
WEF
36 WRITE END-OF-FILE. The end-of-file i s written on
tape.
WTB
(blank)
T 36 WRITE TAPE BINARY. N words a r e written in binary
mode on tape T, starting a t memory location M.
WTD
(blank)
T 36 WRITE TAPE DECIMAL. N words a r e written in
binary coded decimal mode on tape T, starting a t
memory location M.
WTS
(blank)
T 36 WRITE TAPE SPECIAL BINARY. Nwords a r e written
in special binary mode on tape T, starting at memory
location M.