If a character with faulty parity is read, an octal 57 (57
8
) will be stored in HSM in place of the faulty character.
An indicator will also be set and remain set until another read instruction is started.
If this instruction contains a bit in the B
0
2
4
position and the selected Data Disc File is busy in the Simultaneous
Mode, the Simultaneous Instruction being performed will be terminated on the next transfer of data to or from
the file The new instruction will then be executed in the normal manner.
Final Register Contents
(S)t — Ad dress of HSM location one to the right of the last character transferred into memory
(T)
f
= (B)j
Timing
Characters are read at the rate of 32 KC.
Five milliseconds are required to read one sector into HSM.
The average time to get to the designated sector is 25 milliseconds (file latency).
XII-7
Summary of Contents for 301
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