RCA 301 Programmer's Reference Manual page 97

1 Card Read Simultaneous (CRS)
General Description
This instruction reads information from punched cards in the Model 324 and 329 Card Readers into the HSM
using the Simultaneous Mode.
Format
Operation — 1
Symbol
K
1
A Address — Address of HSM location to receive the first character read from punched cards.
B Address — Must be zeros (0000).
Direction of Operation
Left to right.
Outline of Operation
This instruction is initially staticized in the Normal Mode. If the Simultaneous Mode is free and the SMDI
button is not on, the contents of the NOR Register are transferred to the SOR Register and the contents of the
A and B Registers are transferred to the S and T Registers, respectively.
This instruction operates in the Simultaneous Mode. The Simultaneous Mode interrupts the Normal Mode 1.12
milliseconds during the card read time.
This instruction directs the Card Reader to place a card in the read station and operates on successive characters
in the following cycle:
When the translate mode has been specified (N = 1) the character in column one of the punched card is
automatically translated from RCA Card Code to RCA 301 Code and is placed in HSM in the location specified by
the S Register. The following 79 characters are placed in successive locations in HSM. The final character (column
80) is located at (A)j + 79-
When the binary mode has been specified (N = K) each card column is split into two groups of six bits each,
a parity bit is generated and added to each group, and the resultant two characters are transferred successively to HSM.
The character represented by rows 9 through 4 in column 1 (row 9 = 2
location specified by the S Register. Successive characters representing rows 9 through 4 will be read and placed at
(S), + 2, 4, 6 and so on with column 80 being placed at (S)! + 158. The character represented by column 1,
rows 3 through Y (row 3 = 2
rows 3 through Y will be read and placed at (A)j + 1, 3, 5 and so on with column 80 being placed at (S)
Final Register Contents
(S) = HSM location of last character transferred to HSM + 1.
r
(T), = (A),
Timing
Card Reader Card Reader Card Feed Rate Card Feed Rate
Model Model
per Minute per Minute
324
329
Result
Binary read mode specified
Translate read mode specified
5
, row Y = 2°) is read into HSM at (S), + 1. Successive characters representing
Time in Time in
Milliseconds Milliseconds
900 66.7
1500 40.5
5
, row 4 = 2°) is read into HSM at the
PROCESSING TIME (ms)
With Read Release
Without Read Release
0
0
+ 159.
t
18.5
13
VIH-11