M3T320
Also called IT20.Designed by VÚMS.It was manufactured from 1984 to 1990 by Metra Blansko. Hardware is based on MH3000.
Official Description
The basic unit of the M3T 320 intelligent terminal is designed for stand-alone use or as part of the IT 20 system. It is a desktop portable computer equipped with an extended modular BASIC interpreter.
The main areas of use include:
- SCIENTIFIC-TECHNICAL CALCULATIONS: The BASIC interpreter is equipped with enough functions to work with numbers with precision up to 12 orders and an exponent of +99.
- MEASUREMENT AND CONTROL SYSTEMS: M3T 320 is equipped technically and programmatically so that it can work as a programmable control unit of measurement systems, especially IMS-2 (GPIB) and CAMAC.
- ACQUISITION, PROCESSING AND REMOTE TRANSFER OF DATA: M3T 320 provides programmatic and technical operation of external intelligent and non-intelligent terminals, efficient processing of acquired data and their storage on cassette tape memory, floppy disk or data transfer to JSEP computers, or SMEP. Data transfer is secured by the BSC procedure, programmatically created terminal emulators, considered standards, allowing both off-line and on-line connection to a remote computer. With the help of its own peripherals, it forms an effective decentralized data processing system.
- GRAPHIC DATA PROCESSING: Versions M3T 320.2, .3, .4, .b allow solving tasks requiring graphic display and acquisition of graphic records.
- Powerful, fast 16-bit cutting microprocessor
- Operating memory RWM — 160 KB, EPROM — 64 KB
- Built-in means of communication with the operator: keyboard, graphic/alphanumeric display, cassette tape memory or floppy disk memory
- Programming languages: BASIC and ASSEMBLER
- Built-in display capacity: 24x 80 characters (1920 characters), 32x 80 characters (2560 characters), 640x 368 graphic points
- Displayed characters and display method: uppercase and lowercase characters, alphabet, nversion of characters, underline, diacritical marks
- Non-contact keyboard: alphabetic, numeric, function and programmable keys (116 total)
- Possibility to connect peripherals: DP sensor, DP punch, printer, floppy disk, IMS-2, CAMAC, data circuits, coordinate recorder and others,
- Acoustic output with program setting of the frequency and duration of the tone
- Possibility of time management of processes
- Security of graphic output to the coordinate recorder
- Portability
- Ergonomic design
The basic unit in the M3T 320 design is a desktop computer consisting of a processor, keyboard, display, cassette memory (M3T 320.2) or memory with flexible disks (M3T 320.4), power supply, seven positions for input/output adapters and an indicator panel. These components are enclosed in a compact self-supporting cabinet
from plastic materials. The electronics of the processor and other parts are built on the basis of modern semiconductor elements. The sixteen-bit processor is assembled from elements of the MH3000 series, the operational memory consists of semiconductor dynamic memory elements RWM and electrically programmable EPROM elements. The display is equipped with a screen with a diagonal of 31 cm, graphic motifs and text characters are created with a grid of (368 + 16) x 640 points as an image of a defined part of the RWM operating memory. The keyboard is intended for communication with the programmer or operator. The keyboard array is divided into an alphabetic array, edit keys, numeric array, command keys, and softkey array.
The built-in cassette or floppy disk memory is designed for writing and reading application programs in BASIC and ASSEMBLER language. This unit can also be used to store data necessary for the work of programs. The power supply of a modern design provides all the necessary voltages for the operation of the terminal and all connected adapters. Adapters that can be inserted into 7 positions of the I/O grid make it possible to use the full addressability intended for peripherals, that is up to 11 separately addressed external peripherals.
The operating system is stored in EPROM memory and consists of a type part of the firmware, enabling programming in the BASIC interpretation language and optional firmware modules oriented to creating the configuration of additional
technical means. The operating system can be expanded by the user using programs in the machine code, loaded into the RWM type memory area — in the usual
equipment is supplied with tools for assembling and debugging programs in the ASSEMBLER language. The RWM memory is also used to store application programs (usually compiled in the BASIC or ASSEMBLER language). The set of optional modules is continuously updated. The creation of a firmware assembly from optional modules is carried out by the production plant on a special order.
- BASIC-EXTEND interpreter with modules
- Control of cassette tape memory or floppy disk memory
- I/O control (including IMS-2)
- Operations with matrices
- String operations
- Interrupt system
- Coordinate recorder control
- Graphics display control
- Graphical output on a mosaic printer
- processor 16-bit, bipolar sections MH3000
- memory 160 KBRWM, 64 KB EPROM
- output display
- screen with a diagonal of 310 mm
- graphic raster: 640 points per line, 368 lines, 1 text line 80 characters
- number of characters per line 80
- number of lines: 24 or 32 (programmatically selectable)
- displayed characters: according to KOI-8-RVHP and KOI-8-CS 2; characters of seven-bit code (lowercase and uppercase alphabet), alphabetic characters, diacritical marks
- display modes: direct (light characters on a dark background), inverse, with character underline (in direct mode)
- Keyboard: non-contact keys located on an integral part of the case. Allows insertion of seven-bit code characters (lowercase and uppercase alphabet) and diacritical marks of alphabetic characters. Keys for controlling the operation of the computer
- control panel: Indication
Indication
STANDBY -— turning on the mains power
PARITY — memory error :
BUSY — processor in operation
PRINT ALL — simultaneous printing of display contents on the system printer A, B— program-controlled (assembler)
WRITE ENABLE — recording enabled (only in M3T 320.2 version)
TAPE READY — KPP ready (only in version M3T 320.2)
M0, M1 - MFD unit on standby (only in version M3T 320.4)
- RESTART - setting the default state of the processor
- mains switch
- adjust screen brightness
- OPEN — KPP lid lock (only in M3T 320.2 version)
- WREN — registration permission for KPP (only in M3T 320.2 version)
- slow channel: program-controlled syllable transfer (8 bits), interrupt request signal, status code transfer (4 bits), selection code (4 bits)
- fast channel: transfer of words (16 bits) from/to operational memory, the length of the transferred block is determined by the program, maximum transfer speed: 600 Kwords/s
- cassette tape memory (only for M3T 320.2 version): used type: KPP 802 or KPP 800, memory capacity: 2x 75KB, cassette type: according to ISO 3407, tape width 3.81 mm, tape length 86 m, recommended types of cassettes: ORWO DK 490, Maxel DC 300, Scotch 833A-300, Verbatim T300M
- memory with flexible disks (only for M3T 320.4 version), used type K 5600, memory capacity 2 x 150 KB, type of flexible disk: 130 mm (5.25 inch), single-sided recording, recording density: 48 feet/inch, soft-sector , hard-index
- acoustic output frequency set by the program in the range: 100 Hz to 10 kHz, duration set by the program in the range: 0.1 to 32 s
- connectable peripherals: punch tape sensors FS 751 A/M, FS 1501 A/M, FS 1503, punch tape punches DT 105 S, DARO 1000, mosaic printers: CONSUL 2111-03, DZM 180, Robotron SD 1157, D- 100 (IRPR) — enables graphic recording
- alphanumeric display: SM 7202
- external memory with flexible disks: (8 inch), M3T 312.1.3— device version, M3T 310.1.2 or M3T 310.1.3— desktop version
- IMS-2 and GPIB bus (with connector reduction)
- CAMAC NL 2104 frame controller
- X—Y recorder BAK 5T, XY 4105, ENDIM 622
- data circuit: remote transmission: MDS 1200 modem, local transmission: IRPS
- timer M3T 303.11.1
software
M3T 320.2
system cartridge
— Assembler
— DEBUG
— X-REF
Diagnostics
— GRAPH1
M3T 320.4
system disk
— Assembler
— DEBUG
— X-REF
Diagnostics
— GRAPH 1
a set of utilities for working with a floppy disk
M3T 320.3
M3T 320.5
system programs for special order on the agreed carrier medium
permitted work environment
a) ordinary, non-aggressive, without vibrations and shocks, without the influence of foreign magnetic fields except the earth's, at an atmospheric pressure of 84 to 107 kPa
b) relative humidity max. 80% at a temperature of 25 *C
c) temperature range 5 C to 40 C:
d) dust content 0.2 mg/m, of which max. 3% of particles larger than 3 µm (only for M3T 320.2 and .4)
power supply 220V u%, 50 Hz— 2%, max. network impedance 15 O
power consumption max. 500 VA (300 W) — at full load of the I/O bus resources
cooling by forced air circulation with negative pressure in the cabinet
suppression level: RO2 according to ČSN 33 4200
start-up time: 5 min. / NOTE: M3T 320.2 in an environment with a temperature of 10 C — 30 min.
It was produced in four versions, the last one already had 2x 5.25" floppy, before that a cassette unit, an 8" floppy... It had a built-in Basic.
M3T 320.2
with cassette tape memory
M3T 320.3
with floppy disk memory
References
- https://apps.dtic.mil/sti/tr/pdf/ADA338585.pdf (WebArchive)
- https://apps.dtic.mil/sti/tr/pdf/ADA337281.pdf (WebArchive)
- Seminář uživatelů inteligentního terminálu M3T 300, M3T 320: [poř.] ČV elektrotechn. společ. ČSVTS, Tábor 1985: [sborník přednášek]. České Budějovice: Dům techniky ČSVTS, 1985. 121 s.
- 2. seminář uživatelů inteligentního terminálu M3T 300, M3T 320: [sborník přednášek: poř.] ČV elektrotechn. společ. ČSVTS, Tábor 1986. České Budějovice: Dům techniky ČSVTS, 1986. 181 s.
- 3. seminář uživatelů inteligentního terminálu M3T 300, M3T 320: [sborník přednášek] z 3. semináře ČV elektrotechn. společ. ČSVTS, Tábor únor 1987. Čes. Budějovice: Dům techniky ČSVTS, 1987. 232 s.
- 4. seminář uživatelů inteligentního terminálu M3T 300, M3T 320: [sborník referátů] ze semináře ČV elektrotechn. společ. ČSVTS, Tábor 1988. České Budějovice: Dům techniky ČSVTS, 1988. 206 s.
- 5. seminář uživatelů inteligentního terminálu M3T: Tábor 1990. České Budějovice: Dům techniky ČSVTS, 1990. 211 s. ISBN 80-02-00064-1.