CM 7202
These are three independent terminals, plagiarism of the Dec terminals.
The first device developed within the SMEP program in the VVL Žilina program was an alphabetical-number Video Totermal CM 7202. It allowed the display of the display and/no information in the raster of 24 lines of 80 characters per line, equipped with an alphanumeric and function keyboard and allowed to connect to the Minoicable SMEP respectively. Other digital devices through local IRPR interface or distance interface IRPS, respectively. Modem Citt v.24.
Cm 7202
No processor (logic only), IRPR interface (up to 150 kbyte / s) and IRPS (speeds of 100,200,300,600,1200,2400,4800,9600 bps), 80x24, UART MHB1012 (IRPS), MHB2501 / MHB 2502, monitor AZJ 462.
It could be a modified design DEC VT05 or a similar terminal.
- SM 1101 I/O P
- SM 1102 DYN
- SM 1104 Stat
- SM 1106 iOS
- SM 1107 Source
- SM 1108 Signaling plate
- SM 1109 buf
| 7 | ^g | bell | Bell | releases an audible tone on the electronic speaker |
| 8 | ^h | bs | c ← | moves the cursor by one place to the left. |
| 9 | ^i | ht | tab | horizontal card. Moves the cursor forward to the next tab stop. The stops are fixed on every eight characters. |
| 10 | ^j | lf | lf | line shift. Moves the cursor one line down. If it is on the last line, move the contents of the screen one line up. |
| 11 | ^k | c ↓ | moves the cursor one line down. | |
| 13 | ^m | cr | ||
| 14 | ^n | so | CAD | direct addressing of the cursor. Moves the cursor to the row and the column designed by the following characters, 31+Y and then 31+X (the top row and columns are completely left. |
| 24 | ^x | CAN | C → | Moves the cursor by one place to the right. |
| 26 | ^z | sub | c ↑ | moves the cursor by one line up. |
| 29 | ^] | GS | HOME | Move the cursor to the top row, the column completely left. |
| 30 | ^^ | rs | eol | delete by the end of the line (including the character on the cursor). The cursor will remain in the current position. |
| 31 | ^_ | us | eos | deletes the end of the screen (ie he clears the characters at or after the cursor on the current line and all characters on the lines below the current line). The cursor will remain in the current position. |
Use
In addition to Smep, this terminal was used, for example, in the computer of the Czechoslovak People's Army Momi.
The innovated videooterminal cm 7202 m.1 was designed to connect the operator to the computer via the serial asynchronous transmission channel IRPS or CCITT V.24. The terminal was controlled by its own eight -bit microprocessor MHB8080A and was built into the original Video Totermal cabinet cm 7202.
Supplied in three modifications:
- Cm 7202 m.1a - conventional operator terminal;
- Cm 7202 m.1g - terminal for working with graphs and histograms; In addition to normal displaying A/č characters, this modification also displayed two independent graphs or histograms in a raster of 512 points (in the X) x 236 points (in Y coordinates) with a raster grid and a graphic point;
- Cm 7202 m.1t - terminal for working with Czech and Slovak texts; This modification allowed to display a full set of lowercase and uppercase letters of the Czech and Slovak alphabet
It could be a copy of the DEC VT100 or a similar terminal.
Description of the logical part of the terminal
(With GM 7202.M1 charts)
Terminal cm 7202.m1 From a functional point of view, you can divide into three parts:
- Microcomputer SM-50/40 (SM 2138-K board)
- Alphanumeric part (SM 1111 board)
- Graph part (SM 1112 and SM 1113 boards)
- Bidirectionally communicates with a higher computer over 20 mA of the current line or via modem (or modem level)
- communicates with the keyboard respectively. by printer through its parallel interface circuits at the TTL level
- For the alphanumeric part, it generates the base Classic clock HB (13,824 MHz) and the highest transfer rate of 9,600 BD
- controls the operation of the system bus to which the alphanumeric and chart is connected
- analyzes the codes received or already from a computer or from the keyboard and sets individual modes of terminal activity, or performs the command, or sends the code received via the system bus to the alphanumeric or graph part/according to the set up mode/mode/
- analyzes the terminal status when it is switched on to the net, ie, or is in local or remote mode, or the terminal is a graph or just alphanumeric, or or is a connected printer and automatically reports the result to a higher computer.
The detailed description of the individual blocks of the 50/40 microcomputer, including their interconnection, is given in the technical description of the SM 2138-X board.
CM 7202 m.2 was designed to connect the operator to the computer via serial asynchronous transmission channel IRPS or CCITT v.24 and also produced in three modifications:
- A - basic design as a normal operator terminal,
- T - modified design for work with Czech and Slovak texts,
- G - graphic design for work with A/No and graphic information.
System properties CM7202.M2 and
- 300 mm diagonal working field size: min 207 x 120 mm ± 5 mm
- Number of characters displayed:
- 80 x 24
- 132 x 24
- Character cell format: 10 x 10, or 10 x 12 (9 x 12)
- Character display format: 7 x 9, or 7 x 11 points
- The pointer of the following character: a flashing block, or a flashing underlier
- Set of characters depending on the Consul 262.5 keyboard used
- KOI-7N0 + PGS
- KOI-7N2 + PGS
- KOI-7N0 and KOI-7CS2 + PGS
- View A / No Information: Standard Inverted / Underlined / Flashing / Highlights
- Number of brightness levels: 4
- RAM capacity: 6 kbyte
- Interface:
- Irps
- prin
- s2
- Speed V/V transmission Print 300, 1200, 2400, 9600 BD, Print
- Input/output transmission speed IRPS/S2: 50 ÷ 9600 BD
- Keyboard: Consul 262.5
- Keyboard variants: Latin version with Cyrillic, Lat + National Variant * Slovak, Lat + National Variant Czech, Latin
- Possibility to connect external BW monitor: MC 311 P
Plates of printed joints cm 7202 m.2 and
- Sm9170 and
- Sm9171 and
- SM5069
- Sm9170 a/b
- K3
- K4
- K5
- k11
- Sm9171 and
- k7
- k6
- 6_2764.Bin ROM Firmware MHB8080A @ 0x0000 MD5 6EEAE2AA351A0CD71EAFD31C39F10CBC
- 7_2764.Bin ROM Firmware MHB8080A @ 0x4000 MD5 DCF41C0E35AE8560FC00383FA8CB096E
Memory:
| 0x0000 | ROM B6 |
| 0x2000 | Sram characters / MHB2114 |
| 0x3000 | SRAM attributes / MHB2114 |
| 0x4000 | ROM B7 |
| 0x7000 | Backup Memory CMOS / Equipment Parameters / MHB5902 / 4 |
| 0x8000 | 16KIB DRAM Operational memory for SM9170B (8x MHB4116) |
| 0xC000 | ROM ?? |
I/O Ports:
| Address | Reading | Write |
| 88; | ||
| 98 | a data word of the keyboard port | the keyboard port of the keyboard port |
| 99 | the status word of the keyboard port | the command word of the keyboard port |
| A8 | the data word of the communication port | the data word of the communication port |
| A9 | the status word of the communication port | the command word of the communication port |
| B8 | data word port port | data port of print port |
| B9 | the status word of the print port | the command port of the print port |
| C8 | filling the counter 0 | |
| C9 | filling counter 1 | |
| Ca | Filling counter 2 | |
| CB | Timer's operation mode | |
| D8 | ||
| E8 | Timing | |
| F8 | Controller |
References
- https://www.atpjournal.sk/rubriky/prehladove-clanky/pamatnica-k-50.-vyrociu-vzniku-vuvt-v-ziline-8.html?page_id=27971 (WebArchive)
- http://kormus.cz/mvt/pocitace/sm_7202.php (WebArchive)
- http://starepocitace.cz/ceske-a-slovenske-pocitace/terminal-tesla-cm7202-m2/ (WebArchive)
- Videoterminál CM 7202.M2A, sprievodno-technická dokumentácia, TESLA Orava š.p., závod 01 Nižná, 1989
- http://www.brigadyr.net/pozemni_technika/den_spojavaciho_vojska_07/mobilni_pocitac_momi/mobilni_pocitac_momi.htm (WebArchive)