website/content/museum/terta-tap-34.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
TERTA TAP-34	Computers	Professional Computer	Hungary	1980	K580	name image company company_name specs tabs forum_thread photos links oc_id source TAP-34 /media/museum/photos/terta_tap34_1s.jpg /companies/terta TERTA label value NAME TAP-34 label value MANUFACTURER Terta label value TYPE Professional Computer label value ORIGIN Hungary label value YEAR 1980 label value END OF PRODUCTION Unknown label value BUILT IN LANGUAGE Bootloader for CP/M label value KEYBOARD Hall-sensor label value CPU K580 (Russian 8080 clone) label value SPEED 2 MHz label value RAM 60 KB label value VRAM Unknown label value ROM 2 kByte bootloader label value TEXT MODES 80 x 25 label value GRAPHIC MODES none label value COLORS green / black (monochrome) label value SOUND Tick sound when a key pressed label value SIZE / WEIGHT Unknown label value I/O PORTS keyboard, floppy drives, reader, modem, printer label value OS CP/M on floppy disk label value POWER SUPPLY Unknown label value PERIPHERALS Floppy drive (2 X 8 label value PRICE 300000 HUF photos links 1263 title subtitle text image TAP-34 COMPLETE Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/tap34_n.jpg title subtitle text image KEYBOARD Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_keyboard.jpg title subtitle text image DISPLAY FUNCTION KEYS Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_screen_functionkeys.jpg title subtitle text image INSIDE Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_inside.jpg title subtitle text image INSIDE CARDS /media/museum/photos/terta_tap34_cards.jpg title subtitle text image CPU CARD Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_cpu_card.jpg title subtitle text image CRT CONTROLLER CARD Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_crt_controller_card.jpg title subtitle text image FLOPPY CONTROLLER CARD Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_floppycontroller_card.jpg title subtitle text image RAM CARD Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_ram_card.jpg title subtitle text image CONNECTORS Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_connectors.jpg title subtitle text image FLOPPY DRIVES Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_floppydrives.jpg title subtitle text image INSIDE FLOPPY DRIVES Thanks to [www.machines.hu](http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html) for this picture /media/museum/photos/terta_tap34_floppydrives2.jpg title url text www.machines.hu http://www.machines.hu/hirek_cikkek/cikkek/tap34/tap34.html dedicated page with great info 1298 url date https://web.archive.org/web/20230610144416/http://www.old-computers.com/museum/computer.asp?c=1298 2023-06-10

TAP 34 is a self design of Terta company from Hungary. Primarily it was designed as a terminal for big computer systems but it was also able to process data alone. The main integrated circuits were assembled in the USSR and in Hungary by Tungsram, but several parts were imported from other countries.

The built-in monitor was a DME-28 monochrome CRT made by Orion. This company was famous for its televisions in Hungary and the other KGST countries.

The floppy drive attached to the computer was regular 8 inch 77 track drive using IBM format. This drive, which could use single and double sided disks, was a hungarian product also, made by the MOM.

The first design had some communications software in the EPROM, but at the end of the 80's the computer was redesigned. This second design had only 2 kBytes of EPROM, containing the bootloader software for the CP/M. The CPU card, the Ram card, the CRT card and the floppy controller card were all placed into a coloured plastic case.

The system was designed around the classic 8080 circuits.
- Display controller: i8275
- Floppy controller: i8271
- DMA: i8257
- i8255 PIO, i8253 CTC, i8251 USART

TAP-34 had the number EC-8534 in the EC-serries (united serries of computers) of East block and ex-USSR. Abbrevation "TAP" states for Teletype Abonents Point. There were three known modifications of EC-8534: original one, EC-8534.02, and EC-8534.3. The last one had optional capability to boot CP/M clone called VDOS.

The standard software included some built-in teletype programs and BASIC (Terta-BASIC). There was also a so called DP (Developer Package) floppy bootable system for assembly development (included editor, assembler and debugger).

Some constructive features of TAP-34 and the mentioned software suggest that there was some prototype CPU as well as original development software which were borrowed to design the TAP-34. ________

Contributors: Kun-Szabo Marton, Cyril Murzin
Source = www.machines.hu

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.