THE HT-1080Z, HT-2080Z AND HT-3080C COMPUTERS

OVERVIEW

The HT-1080Z, HT-2080Z and HT-3080C computers were manufactured by Híradástechnika Szövetkezet in Budapest, Hungary from 1983 to 1986. The HT-1080Z was one of the first official school computers in Hungary.

Initial versions were unaltered VideoGenie I computers relabeled and mounted with an on-board Yamaha/General Instruments AY-3-8910 sound chip. (The EACA VideoGenie I was in turn slightly modified clone of the popular TRS-80 Model 1 with Level II BASIC. The Yamaha chip is the same one that appeared in other famous computer models, such as the Amstrad and the Atari ST.)

Later revisions of HT-1080Z were re-designed by Híradástechnika Szövetkezet to have accented Hungarian characters, modified ROM contents (BASIC extensions) and several peripherals.

The basic properties of the most popular HT-1080Z models are summarized here:

Name	HT-1080Z
Manufacturer	Híradástechnika Szövetkezet, Budapest, Hungary
Type	School computer
Year	1983-1986
Built-in language	BASIC (Microsoft 12k Level II BASIC)
CPU	Z80
Speed	1.77 MHz
Keyboard	Full stroke QWERTY keyboard, no extra Hungarian keys
RAM	16kB, later 48kB
ROM	12kB + 1.5kB extension (monitor, Hungarian support)
Text modes	16x32 or 16x64 switchable
Graphic modes	128x48
Colors	Monochrome (black and white)
Display	External composite video monitor or black&white TV
Sound	Built-in AY-3-8910 sound chip (3 channels and noise, 11 octave)
I/O ports	50 pin expansion bus, TV signal, external tape, composite video, 8 bit I/O port (provided by the AY-3-8910)
Built-in storage media	Built-in tape recorder with normal compact cassette (500 baud)
Power supply	Built-in power supply
Peripherals	Printer interface; extension unit with floppy controller and high-resolution graphics controller; external floppy drive
Price	35 400 HUF (in 1984), about 700 USD (note that HUF was not convertible to USD at that time)

HT-1080Z/64 had 48kB RAM and support of accented Hungarian characters.

HT-1080Z (click to enlarge)	HT-1080Z/64 (click to enlarge)

High-resolution graphics and floppy disk interface were available in external units to be connected to the expansion port of the computer.

Extension unit	Floppy disk drive

The HT-2080Z machines had the same specifications as the 1080Z models, but they were positioned as business computers instead of school computers.

HT-2080Z (click to enlarge)

The 3080C model was available in prototype form only. It was designed in response to a call for a tender to prepare the second generation of school computers in Hungary. Its main characteristics were as follows: high resolution graphics (256x192 pixels, 8 colors), RGB output, Centronics interface, function keys, full support of Hungarian accented keys, and emulation of Sinclair ZX Spectrum BASIC programs.

HT-3080C (click to enlarge)

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Currently three emulators are available: HT1080Z (by Attila Grósz), Real-80 and Real-80 PRO (by Zoltán Kollár). If you are interested in these machines then please download and try them.

Emulator	Download	Information
HT1080Z	ht1080z_v1.5.zip	Features Documentation
Real-80	real-80_v1.2g.zip	Features Documentation
Real-80 PRO	real-80pro_v2.4.4.zip	Features Documentation

BASIC programs are available to dowload here, while SYSTEM (machine language) programs are available here. Note that a large number of programs is available at TRS-80 sites, thus only Hungarian programs (and programs that were wide-spread in Hungarian schools at that time) are stored in this site.

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HT1080Z EMULATOR FEATURES

Start-up screen with options

• Full and cycle exact Z80 CPU core
• Support for VideoGenie-1/System-80 and all series of HT1080Z computers
• Support for 16 and 64 kb memory setups
• NMI interrupt (RESET)
• Video Cut (32 columns mode) and Page buttons
• 3 channel YM2149 sound chip emulation along with the noise and envelope generators
• TRS-80 compatible tape sound
• Full keyboard emulation
• Direct loading of the disk based CMD format files
• Read/write support for the CAS tape format
• WAV format support for tape output
• Simple printer support

Built-in Z80 monitor

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REAL-80 EMULATOR FEATURES

Start-up screen of Real-80

System requirements:
P200 or faster CPU, Windows XP SP2 operating system recommended, on such PC the emulator runs flawlessly.
MS-DOS 6.2 or Windows 98 operation system: VESA compatible video card, sound blaster 2 soundcard.

Emulator features:

• 1.774 MHz CPU clock speed
• Entire Z80 command code including the non defined ones
• Undefined flags (XF and YF)
• Precise Z80 cycles times
• Z80 Reset F11, NMI F12, INT lines
• 16K or 48K RAM
• Replaceable ROM and character generator
• Full HT keyboard
• CUT F5 and PAGE F6 keys
• Tape recorder
• 8" SS SD Floppy disk
• Built-in debugger
• 640x480x256 60Hz screen resolution
• Audio: Sound blaster 2, 8 bits, Mono, 22050Hz
• Screen snapshot Alt-F1 into BMP file.

Z80 debugger and emulator options in Real-80

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REAL-80 PRO EMULATOR FEATURES

Start-up screen of Real-80 PRO

• 1.774 MHz CPU clock, precise Z80 cycles times, all Z80 op codes including the non defined ones and XF/YF flags.
• Z80 Reset, NMI, INT lines.
• All three HT-1080Z series ROMs and character generators included with selectable 16/48K memory.
• Full HT keyboard with CUT and PAGE keys, Pause mode.
• Tape recorder, printer, four 5 1/4" SS SD floppy disk, internal clock
• Yamaha YM2149 sound chip (originally supported only in HT series)
• Micolor 01 (Hungarian expansion board) and Lowe Electronics LE18 graphic board.
• Built-in debugger
• Audio: 8 bits, Mono, 22050Hz
• Screen snapshot into BMP or JPEG file.
• Turbo mode, 2x or Full (20x).
• Program autostart, text file input as keyboard
• Predefined and custom "skins"
• Favorites
  

Z80 debugger and emulator options in Real-80 PRO

TOOLS

CMD2CAS

This program (written by Attila Grósz) converts standard TRS-80/System-80 disk (CMD) files to tape (CAS) images. Download the program together with source code (GPL license) here: CMD2CAS

Usage: cmd2cas <cmd_file> <cas_file>

At the moment there are no command line options available. Also, for now there are only two CMD block types supported: type 1 and 2. The program should work for most CMD files nevertheless.

The resulting CAS image is a system image, you have to load it by typing the command SYSTEM followed by the name of the program in the CAS image (this is the first 6 letters of the filename). When the prompt is back, you should type / (slash) to start the program as CAS files never autostart by themselves.