Bosman 8

This is the classic CP/M machine. It contained of 3 parts: CPU/FDD unit, which I don't have, specialized video terminal (I have one) and specialized Neptun monitor with power supply for both. As I can't even get terminal running, I'll write this page using manuals, PCBs and documents.

Bosman 8 was produced in two models: One with 5.25" FDD and one with two 3" FDD. It was very rare, because of expensive western components used. First units were manufactueed by small company Matex, these were testing ones. CPU unit is known as Matex ANC-4512.

Bosman 8 had some additional capabilities, not widely seen in CP/M machines. Its terminal unit, ANG3001, was a highly specialized Z80B-based computer with 64K of RAM, graphics and simple windowing support. CPU had its operating system, CP/M R, burned into EPROM so it was not needed to use boot disks. RAM disk A: (floppy disk was B: or B: and C: if two were used) allowed to store data, and it was prone even to hard-reset with reset button, so looped programs could be indestructively restarted. There was an additional system program "D", which was helpful with file operations. Graphic capabilities of terminal destinated this computer as CAD workstation, manufacturing control and visualization machine or measurement station.

One more thing, there were two types of terminal units: AN2001 (alphanumeric) and ANG3001 (graphic). Special (on demand)version, ANG3000 had additional printer port allowing real PrintScreen and port forwarding. AN-2000 is not usable with Bosman, it has no character inversion, 8-bit data transmission and 100 000 baud exchange using computer's clock.


Manufacturer Unimor


(shown terminal only)

Origin Poland
Year of unit 1989
Year of introduction 1987
End of production 1989
CPU Z80
Speed 4MHz
RAM 512K
ROM 16K
Colors:  
Sound: Terminal beeper
OS: CP/M 2.2 (CP/M R)
Display modes: Text: 80x24 (+ terminal control line)
Graphics: 512x256x2 (only with ANG3001 terminal)
 
 

 

Media: Built-in floppy drive
416K RAM can be used as RAM drive.
?Tape recorder*?

Power supply:

D-SUB 9 male connector at the computer and terminal:


1,2  - +5V DC 1.5A
3 - -12V DC 0.05A
5 - +12V DC 0.25A
7 - GND
8 - GND
All other pins n.c or terminal audio/video outputs (Video: 6, Audio:9)

I/O: Centronics
V.24 serial port (x2).
 
 
 
 
 
 
Possible upgrades: Not known
   
Software accessibility: CP/M - quite good.
Dedicated - impossible.

Unfortunately my terminal is not running - the EPROM has "evaporated" and is blank. There are some notes on the mainboard made by service - it can be read that 8255 PIO has been replaced and it won't start.

Terminal keyboards used by Unimor are recovered from older, D-180KSRE printing terminals to Odra mainframes. They produced much of its parts as spare ones and had lots of them, so they used it to clean warehouses.
One more thing, these keyboards were expensive, but quite durable - they're magnetic based, using better mechanisms than in Elwro 800 Junior, so even strong hit in key probably won't damage it much. The only weak parts are these switches on the left.

To make terminal display Polish diacritized characters, BREAK key is used like Alt in today's Polish Programmer's keyboard.

There's noticed in manual that tape recorder can be connected. It should be possible using serial port additional pins.


Contents: Starting Recording media Pinouts Links

Starting:

After powering up the terminal will make its Power-on self test, indicated by 4 short sound tones. The algorithm is as follows:

1. Programming parallel IO: 8251, 8253, 8255
2. Starting first tone
3. Testing RAM
4a. If RAM is faulty, continue playing first tone.
4b. If RAM is good, playing second tone.
5. Testing rest of EPROM memory
5a. If rest of EPROM if faulty,  continue playing 2nd tone.
5b. If it's OK, playing third tone.
6. Sending text to display unit
7. Playing 4th tone.

Text is consisted of bytes written in hex:
1. Value from Port B of 8255
2. Value set to 8251, determining its mode.
3,4. Value of #2 counter in 8253.
5,6,7. EPROM version (day, month, year in US11)

It should be noticed that it won't work if there's no EPROM, it's empty, or its first bytes/bits' lines are damaged.

If LOCAL key is pressed when RESET is performed, terminal goes with parameters according to jumpers on mainboard. Unfortunately I don't know their configuration. If key is not pressed, it takes configuration from EPROM.

To make it running, you have to connect these pieces as follows:

OK, If you don't have a monitor with power supply, you can use any power supply giving +5V, +12V and -12V DC and an ordinary composite/luma monitor (TV with composite input will be OK). See pinouts. Sound input will be useful for testing terminal unit.

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Recording media

Recording media for CP/M systems is mainly restoring disks from images, for example using programs shown in Elwro 800 Junior fileland. Unfortunately, I have no idea about geometry used by Bosman. It is definietly some CP/M.

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Pinouts:


ANG3001 Terminal:

Power and video connector:

1 - +5V DC
2 - +5V DC
3 - -12V DC
4 - n.c.
5 - +12V DC
6 - VIDEO
7 - GND
8 - GND
9 - AUDIO

 

Serial connector:

1 - Shield ground
2 - TxD
3 - RxD
4 - RTS
5 - CTS
6 - DSR
7 - GND
11 - RxD/I
15 - TC
18 - RxD/R
20 - DTR

 

Printer connector - only in ANG3000!

1   - /STROBE
2   - D0
3   - D1
4   - D2
5   - D3
6   - D4
7   - D5
8   - D6
9   - D7
11 - BUSY
13 - SLCT
16 - /INIT
17, 19-25 - GND

 

Bosman 8 Computer:

 

Power connector:

1 - +5V DC
2 - +5V DC
3 - -12V DC
4 - Reserved
5 - +12V DC
6 - Not used
7 - GND
8 - GND
9 - +12V

Remember not to plug computer's connector to terminal! +12V to audio output is not a good idea!

Terminal connector:

1 - Shield ground
2 - TxD
3 - RxD
4 - RTS
5 - CTS
6 - n.c
7 - GND
8 - CLK
9 - n.c

Clock is used with high speed transmissions.

The biggest problem with connecting terminal to computer is that there's no one way that works with all models. You have to use two pairs of wires: One which connects RxD and TxD, ans is crossed (Terminal's RxD to computer's TxD and vice versa), and second one - connecting RtS/CtS, corssed too. Next, you have to connect ground, which is pin 7 of both connectors.
To make use of DSR, DTR and DCD lines, DSR and DTR must be shorted in terminal-side connector. I think it'll work, but I don't guarantee anything. You can also look to terminal manual, it shows not existing pins on computer side :). Anyway, it states that computer has 25-pin connector too :).
As the computer was designed in Technical University and terminal is Unimor's (exactly MAGMOR's) creation based on suggestions from the University, it's quite possible that those who wrote ANG-3001 manual have never seen Bosman in real life!

Printer port:

1   - /STROBE
2   - D0
3   - D1
4   - D2
5   - D3
6   - D4
7   - D5
8   - D6
9   - D7
10 - /ACK DZM
11 - BUSY
12 - n.c
13 - SLCT
14, 15 - n.c.
16 - /INIT
17 - GND
18 - ST DZM
19-25 - GND

It's configurable in OS - to be Centronics or DZM-180.

Serial port:

1 - Shield ground
2 - TxD
3 - RxD
4 - RtS
5 - CTS
11 - RxD / I
14 - GND
16 - EAR
18 - RxD / R
20 - DTR
24 - CLKB

All other pins are not connected. There's a CQ12DP diode between RxD/I and RxD/R in some units, look in manual.
I think it may be a light pen.

 

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Links:

http://web.archive.org/web/20120209180807/http://www.elwro.zafriko.pl/kat/mikrokomputery/unimor_bosman_8 - Short description
http://8bit.yarek.pl/computer/z80.bosman8/index.html - Description and photo.
http://www.old-computers.com/MUSEUM/photos/gze-unimor_bosman-8_mobo_1.jpg - Mainboard photo.
 

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