HT PTA-4000+16 pocket computer

IN the early 1980s, we were still complaining about the disadvantages of the embargo, but copying Western technologies was allowed. The Híradástechnika Szövetkezet (HT) was at the forefront of this, where – among other things – the PTA-4000 target computer was born. Since the manufacturer had built 16 KB of RAM into the machine, it met the 4 Neumann conditions, but due to its small display it could only be considered a target computer (picture).

Category:

Target computer

Technology:

Custom semiconductor

Origin:

domestic

Creation:

The PTA-4000+16 is a licensed enhanced version of the Sharp PC-1500 made of CMOS components with 16 KB of RAM, built in Hungary.

Developer:

Advertising Technology Cooperative

Manufacturer:

Telecommunication Cooperative

Use

Operating time:

1986-1992

Typical applications:

Two examples:

surveying tasks
EMKE long-distance bus ticket vending machine (with connection to a suitable printer)

Operating locations:

The descriptions mention a wide range of applications, in which the portability of the machine was essential.

Year:

~ 12 000 - 15 000 Ft

Available for viewing:

Information Technology History Exhibition

Structure

Central unit

controller: LH 5801, 8-bit (CMOS) microprocessor, clock frequency 1.3 MHz
main memory: 3.5 KB +16 KB SRAM (8*2 KB)
calculator: ALU built into a microprocessor

Periphery

backup: none
external devices:
- LCD display, 158*7 pixels
- alphanumeric keyboard (65 keys)
- built-in KA-160 printer
- beeper
- real-time clock
connection ports:
- RAM interface (4-32 KB)
- 60-pin expansion connector for data recorder and program modules (CE-153 software board, CE-502A software library, etc.)

Separate battery and power adapter connector.

Operation

To use the machine, the desired application program had to be loaded into the main memory, after which it could be run.

Display:

in text mode: 1 line, 31 characters
in graphics mode: 158*7 pixels

Printer: 57 mm wide paper ribbon, four-color graphics

Program set

General programs

operating system: none
programnyelvek: BASIC

Custom programs

Custom application programs have been created to solve specific tasks

Historical curiosities

As a precursor to today's mobile phones, it was considered a special device in its time.

For those interested: The history of HT

Resources

Historical overview and technical data: HT PTA-4000

Detailed overview of the Cooperative's computing products: HT calculators/computers

Detailed description of the "prototype": Sharp PC-1500 (English)

Created: 2016.08.13. 21:59
Last modified: 2024.02.15. 18:02

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