RCA 301, Programmer'S Reference Manual

Page: 118 / 235

8 Tap e Write Normal (TWN)
General Description
This instruction transfers a specified series of consecutive characters in HSM to a designated Tape Station,
a Paper Tape Punch, Interrogating Typewriter, or Monitor Printer.
Format
Operation — 8
N — Identification character of Tape Station, Paper Tape Punch, Interrogating Typewriter, or Monitor
Printer. (See Appendix G.)
A Address — Address of the first location in HSM to be written, punched, or typed.
B Address — Address of the last character in HSM to be written, punched, or typed.
Direction of Operation
Left to right.
Tape Motion
Forward
Outline of Operation
Initially this instruction sends a start signal to the output unit specified by the contents of the N Register and
operates in the following cycle:
The contents of the HSM location specified by the A Register are transferred to the output unit specified by
the N Register. The contents of the A Register are compared with the contents of the B Register. The contents
of the A Register 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)
t
= Address of location one to the right of the last character written, punched or typed.
(B)f = (B),
Timing
Hi-Data tapes, Model 381, are written at the rate of 10 KC and Hi-Data tapes, Model 382" are written at the
rate of 30 KC. Paper tape is punched at the rate of up to 100 or 300 characters per second.
The tape station attached to the Tape Adapter or Dual Tape Channel is written at the rate of 33.3 KC if it is
a Model 581 Tape Station or 66.7 KC if it is a Model 582 Tape Station.
The Interrogating Typewriter and the Monitor Printer type at the rate of 10 characters per second.
Example
Instruction:
Operation N A Address B Address
8
1 4001 4005
IX-10