RCA 301, Programmer'S Reference Manual

Page: 57 / 235

# Transfer Data By Sy mbol Left (DSL)
Repeatable
General Description
This instruction transfers data terminated by a selected symbol from one HSM location to another.
Format
Operation — #
N — Selected symbol on which to stop transferring.
, A Address — HSM location of leftmost character to be transferred.
B Address — Destination address of first character.
Direction of Operation
Left to right
Standard Location
STA (0212-0215)
Outline of Operation
This instruction operates in the following cycle:
The contents of the HSM locations specified by the A Register are compared with the contents of the N Register.
The character specified by the A Register is transferred to the HSM location specified by the B Register and the
contents of the A and B Registers are incremented by one. If the comparison proved equal, the instruction terminates.
If the comparison proved unequal, the cycle is repeated.
Final Register Contents
(A), = HSM address location one to the right of the specified symbol in the original area.
(B), = HSM address location one to the right of the symbol in the destination area.
Timing
Total time in microseconds.
= I4n + 49, where n equals the number of characters being transferred.
Example
Instruction:
Operation
#
HSM before Instruction is Executed:
N
A Address
2000
B Address
2007
2000 2001
2002
2003 2004
2005 2006
2007 2008
2009 2010
2011
2012
$ 4 3
2
—
—
—
— —
—
— —
HSM after Instruction is Executed:
2000 2001 2002
2003 2004
2005 2006
2007 2008
2009 2010
2011
2012
$ 4 3
2
y y
— —
$
4 3
2
y y
—
Final Register Contents:
(A)
t
= 2005
(B)
f
= 2012
Time:
(5 x 14) + 49 = 119 g,s.
V-ll