TABLE OF CONTENTS: Originally 'Routines' (=Subroutines=)

Page 4: Originally 'theoperate' (while a program is operating by means

of =the operate= instruction.)

Page 7: Added comma (The instruction base address, =Y,= is in octal

digits 7 through 11.)

Page 8: Standardized from 'sub-routines' (The conversion of decimal

numbers into the binary system for use by the machine may be

performed automatically by =subroutines=.)

Page 8: Standardized from 'sub-routine' (the output conversion of

binary numbers into decimals is done by =subroutine=.)

Page 16: Added comma (This instruction will shift the contents of the

combined register right N =positions,= where N is octal digits

7-11 of the instruction word.)

Page 16: Moved comma. Was 'left, N positions' (This instruction will

shift the contents of the combined registers =left N positions,=

where N is octal digits 7-11 of the instruction word.)

Page 19: Was 'know' (Most in-out operations require a =known= minimum

time before completion.)

Page 20: Removed inconsistent comma (These are the Test Address (15

bits), the Test Word (36 bits), and the Sense =Switches= (6

bits).)

Page 21: Changed comma to period (the computer will halt at the

completion of each memory =cycle.= This switch is particularly

useful in debugging programs.)

Page 28: Was 'tpae' (during reading or backspacing when the =tape=

comes to an end of record gap.)

Page 29: Standardized from 'de-select' (the unit will =deselect= (or

disconnect).)

Page 35: Was 'propares' (An assembler or compiler =prepares= a machine

language tape suitable for direct interpretation)

Page 35: Removed comma (Frequently used instruction =sequences= thus

need only to be defined once.)

Page 37: Was 'Routiines' (=Routines= which require two operands, e.g.,

add, subtract, multiply and divide)

Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) October, 1960 · 第 71 / 71 题