TECHNICAL SPECIFICATIONS
GENERAL PRECISION
LGP-21

INSTRUCTION

EFFECT

Am

Add

Bm

Bring

Cm

Clear

Dm

Divide

Em

Extract

Hm

Hold

I62oo

Shift Left 6 Bits

It

Input in 6-Bit Mode

=-I62oo

Shift Left 4 Bits

=-It

Input in 4-Bit Mode

Mm

Fractional Multply, or Right Shift

Nm

Integer Multply, or Left Shift

Pt

Print, 6-Bit Mode

=-Pt

Print, 4-Bit Mode

Rm

Set Return Address

Sm

Subtract

Tm

Transfer on Negative

=-Tm

Transfer on Negative or TC Switch

Um

Unconditional Transfer

Ym

Store Address

Zoooo

Stop

Zt

Skip according to setting of designated

Branch Switch

=-Zt

Skip according to setting of Overflow

Indicator and designated Branch Switch

NOTE: m = Track and Sector

t = Track Portion Only

MINIMUM ACCESS TIME

0.78 ms

COMMAND EXECUTION TIMES

0.39 ms (Except Multiply and Divide)

(Excluding Access)

25.74 ms (M Multiply)

24.96 ms (N Multiply)

26.13 ms (Divide)

COMPUTER TYPE

Digital, general purpose, internally stored program

NUMBER SYSTEM

Binary, fixed-point arithmetic

OPERATION

Serial

Memory Type

Disk

MEMORY CAPACITY

4096 Words

WORD SIZE

32-bits including sign

NUMBER OF BRANCH

SWITCHES

4

CLOCK FREQUENCY

80 KC

INPUT/OUTPUT FORMAT

Decimal, alphanumeric, and hexadecimal

INPUT/OUTPUT CAPACITY

Up to 32 devices

CENTRAL COMPUTER

PHYSICAL DIMENSIONS

Height 11 1/2 Inches

Width: 31 Inches

Depth: 20 Inches

Weight (uncrated) approximately: 90 Lbs.

BASIC SYSTEM

PHYSICAL DIMENSIONS

(Including Printer & Stands)

Height 36 Inches

Width: 62 1/4 Inches

Depth: 21 Inches

Weight (uncrated) approximately: 155 Lbs.

CIRCUIT ELEMENTS

Transistors, printed circuits

POWER REQUIREMENTS

Approximately 300 watts maximum,

excluding input/output devices;

110 volts AC, 60 CPS, single phase

OPERATING ENVIRONMENT

Normal room temperature

NUMBER OF INSTRUCTIONS

23

©1963 GENERAL PRECISION, INC.

Presented for educational use only.