IBM 1401 - Modifiers For Select Stacker (K) Instruction

Modifiers For Select Stacker (K) Instruction

BCD Character Unit Meaning
Blank 1401 set program activity recording

at BBB only if A is, dd
1 1402 select last card read to stacker 1 if within 10 ms
2 1402 select last card read to stacker 8/2 if within 10 ms
4 1402 select previous card punched to stacker 4
8 1402 select previous card punched to stacker 8/2
= or # 1444 select previous card punched to stacker 2
L 1009 operate in load mode
$ 1402 overlap on
A 1009 suppress 3-second alarm
C DDC read request
D 1009 set direction to receive
DDC write request
E 1009 set direction to transmit
DDC reset
F 1009 send EOF
. 1402 overlap off
) 1402 reset overlap

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