Programming instructions

ARITHMETIC AND CONTROL ELEMENT

In this chapter the

described in detail.

plained and listed.

functions of the Arithmetic and Control Element are

The operations of the machine instructions are ex-

CHAPTER 2

Functions

INTERNAL PROCESSOR

The Internal Processor performs arithmetic operations, controls memory

access, and handles information entering and leaving the machine. It

consists of the Information Processor Control, which oversees all activities,

and six registers: Accumulator, Link, Memory Buffer, Memory Address,

Instruction, and Program Counter. The elements of the Internal Processor

are shown within the broken line in Figure 3.

Data Interrupt

address and

data lines to e

and from external

devices, under

control of Real

ACCUMULATl

Time Option

L’

SWITCHES,

(Of

---I

Normal data ___.

transfer lines

to and from

Option or under

ACCUMULATOR 18

PROGRAM

COUNTER 13

BUFFER

KEYS

(of Operator ,

Console)

- INTERNAL

(control states.

PROCESSOR

timing,.etc.)

--3--v-

-----c--Be

Figure 3 - Arithmetic and Control Element