NAME  

ET-3400

MANUFACTURER  

Heathkit / Zenith

TYPE  

Home Computer

ORIGIN  

U.S.A.

YEAR  

1977

BUILT IN LANGUAGE 

Monitor in ROM

KEYBOARD  

17 keys Hexadecimal keypad

CPU  

Motorola 6808

SPEED  

1 MHz

RAM  

256 bytes expandable to 1 KB

ROM  

1 KB

TEXT MODES 

6 x 7-segment LEDs

SIZE / WEIGHT 

30.5 (W) x 30.5 (D) x 10.15 (H) cm. / 2 Kg

POWER SUPPLY 

External AC adapter

PERIPHERALS  

Prototype area

PRICE  

Unknown

 

Heathkit ET-3400

Heathkit ET-3400

 The Heathkit/Zenith Microcomputer Learning System model ET-3400 was a very popular item designed to teach principles of computers and programming at Universities in the 1970s., and to educate the students of internal computer hardware and software components by self-assembly and programming the machine in pure Hexadecimal language.

It was delivered in assembled or kit form. It also featured a prototype


area and could be used as a design aid for developing special interface circuitry with common 6820 parallel interface or 6850 asynchronous chips.

Several software in ROM were also available, among them an Assembler and a Tiny BASIC.