RCA 301 Programmer's Reference Manual page 204

Op.
Code Instruction
Specifies additional
H Sector Write Disc
Normal
Block Write Record
I
Simultaneous number of blocks to be
Sector Write Disc
I
Simultaneous
J Transfer Symbol
to Fill
K Locate Symbol Left
Locate Symbol
L
Right
Transfer Data Left
M
N Transfer Data Right
Transfer Data by
P
Symbol Right
Q.
Logical "OR"
C-5
N
HSM address of first
number of sectors to be character to be written
written and file selected
2°, 2 \ 2\ 2"
selects HSM address where first
character is to be written
written
2* = 0, selects first file
1,
2* = se lects second file
Specifies additional HSM address of first
character to be written
number of sectors to be
written and file selected
Selected Symbol Leftmost HSM address
to be filled
Selected Symbol Leftmost HSM address
to be searched
Rightmost HSM address
Selected Svmbol
to be searched
HSM location of left­
Number (0-44) of char­
acters to be transferred most character to be
transferred
HSM location of right­
Number (0-44) of char­
most character to be
acters to be transferred
transferred
HSM location of right­
Selected symbol on which
most character to be
to stop transferring
transferred
Number (0-44) of char­ HSM address of LSD
acters in each operand in first operand
(and result)
APPENDIX C. S UMMARY
A Address
designates first sector to be written to
Bo
2 4 of = 0, prevents override of Data
Bo
Disc Simultaneous instruction
1,
2* of =
Bo
Disc Simultaneous instruction
specifies zone to be written to
Bi, B Bj
!;
B = Must be zero (0)
0
= odd-record returned after operation
Bi
Bi = even-record stays on turntable and
arm is placed at beginning of
selected band after operation
B
j 1
= — block terminates on counting
900 characters
Bj = 0 — count or EB recognition
Bj = addresses cells 1-10
2 3 , 2 2 , 2 1 , 2° bit of Bo de signates 1st sector
to be written
4
2 of = 0, prevents override of Data
Bo
Disc Simultaneous instruction
1,
2* of =
Bo
Disc Simultaneous instruction
specifies zone to be written to
Bi, B , Bj
2
Rightmost HSM address to be filled
Rightmost HSM address to be searched
Leftmost HSM address to be searched
Destination HSM address of first
character
Destination HSM address of first
character
Destination HSM address of first
character
HSM address of LSD in second operand
B Address
permits override of Data
permits override of Data
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