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V > VIDEOTON  > TV Computer   

TV Computer

This computer was used in the 80's in Hungarian schools along with the Primo. It was very similar to the Enterprise 64 as it was a licensed product. There is even a built-in joystick on the right of the keyboard.

There are different models : 32 KB, 64 KB and 64 KB+ (picture here). The 64 KB+ has more video RAM (64 KB instead of 16 KB) and different versions of ROM (2.1 - 2.2 & 2.4 instead of 1.1 -1.2 - 1.3 & 1.4).

The main physical difference of the TV-Computer is the four expansion slots that are placed at the top left side of the case, allowing easy upgrade of the system. On the left side, one can find two joystick connectors and a cartridge slot (16 KB max.) for games, applications and operating systems. TVC OS is built-in the system (along with Basic), but UPM (special version of CP/M for the TVC) or VT-DOS (DOS 3.10 compatible) could be implemented this way. VT-DOS could only read/write IBM PC disks, as it was not fully compatible with both the hardware and software.

Thanks to Gabor Monok for all the info & pictures!


TVC's network, by Béla Czeiner:
Can you imagine a network from these PCs?
I had worked on it!
It means that 8 TVC was connected to a standalone floppy disk drive (which was able to handle 2 (!) disks). So it was possible to "distribute" data from this common FDD. But mainly we stored our programs written in Basic to tape drives.
And a story:
When you were ready with your program and tried to connect the tape - or doing any other hasty movement - knocked the table under your TVC you had a great chance of a reboot... ;-)

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.
NAME  TV Computer
TYPE  Home Computer
ORIGIN  Hungary
YEAR  1983
KEYBOARD  Full-stroke keyboard, hungarian layout (QWERTZ)...
CPU  Z80
SPEED  3.125 Mhz
CO-PROCESSOR  HD46505SP (CRT controller)
RAM  32 KB or 64 KB, depending on models
VRAM  TV-Computer 32k & 64k : 16 KB
TV-Computer 64k+ : 64 KB (4 x 16 KB)
ROM  20 KB (OS+Basic), 24 KB max.
TEXT MODES  64 x 24
GRAPHIC MODES  128 x 240 (16 colors), 256 x 240 (4 colors), 512 x 240 (2 colors)
SOUND  1 channel
SIZE / WEIGHT  46 (W) x 19 (D) x 11(H) cm / 2.8 kg (+ 0.8 kg for the separate PSU)
I/O PORTS  Cassette interface, Centronics, 2 x joystick connectors, 1 cartridge slot, 4 expansion slots (8 KB ROM max. each)
OS  TVC OS, UPM (special CP/M for TVC), VT-DOS (DOS 3.10 compatible)
POWER SUPPLY  External power supply unit: +12V, -12V, +5V
PERIPHERALS  Tape recorder, UART (Async. receiver/transmitter, with 8251), Floppy Interface (2 x 720 KB FDD)
PRICE  12800 HUF / 53 (Hungary, 1985)

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