RCA 301 Programmer's Reference Manual page 96

When Card Read instructions are staticized in which each N character is 1, cards may be read at any rate up to
200 cards per minute. No terminating instruction is necessary since only one card has been fed into the Card Reader
transport mechanism by this instruction.
Automatic card translation does not take place if the BCT button on the Computer Console Panel is in the
"on" position. Each card column is then 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 into 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 are also read into memory
with column 80 being placed at (S); + 79. The character represented by column 1, rows 3 through Y (row 3 = 2
row Y = 2°), is read into HSM at (S), + 80. Successive characters representing rows 3 through Y are likewise
read into HSM with column 80 being placed at (S), + 159. The final S Register setting is (S)j + 160.
Final Register Contents
(S), = One location to the right of the last character read into HSM.
(T) = (A)i with BCT off.
f
(T) = (A)j + 80 with BCT on.
t
Timing
Card Feed Rate
per Minute
600
300
up to 200
* Indicates time available between card cycles. Additional compute time for processing other than this card is also available while the
card data is being read into H.S.M.
** ±1.5%.
VIII-10
5
, row 4 = 2°) is read into HSM at the
Time in
Milliseconds
100**
200**
300 (Minimum)
Time Free
For Other Processing*
20**
120**
20 (Minimum)
5
,