DEBUT-M
 

Hello, friends!

I would like to proudly present you russian chess computer from 1994 (see attached photos).

Its based on PC's programm Mirage by Vladimir Rybinkin - a participant of several WMCCCs and AEGON tournaments.

CPU: KP1810BM86 - a clone of Intel 8086
ROM: 8 x 2 = 16kb; RAM: 2 x 2 = 4kb
Pressing-sensory board and 4x7-segmental LCD

Playing levels: 3-5-10-15-30-45-60-90-120-150 minutes per 40 moves

Hope this one will be added to schach-computer.info/wiki

Thanks for your attention!

AW: DEBYUT-M
 

Schachmattnüj kompjuter made in russian federation :) Very nice! Reminds me of some devices from gdr produced by robotron... EC1834 had same cpu. Sometimes there was even Siemens 8086 inside, despite of trade embargo...

It is said, the WM86 (BM86) stands for "we made 86" :D

Do you know the retail price in rouble?

Cheers,
Andreas

Re: DEBYUT-M
 

Hi, unfortunately the price isnt stated on device and in manual; also there's no info about opening library size.
Power supply: 9,5 V / 900mA
DEBYUT-m was produced in Moscow, and ELECTRONICA chess computers - in St.Peterburg (former Leningrad)

AW: DEBYUT-M
 

Hi Ivan,

thank you. The question was because "comparable" devices in gdr with U880 had a very high pricing, considerably exceeding an average monthly income... But, ah, I see that it is from 94, 10 years later... that can make a huge difference...

Cheers,
Andreas

Re: DEBYUT-M
 

Hi Ivan,

Nice computer ;). Can you estimate it's playing strength?

Regards, Paul

Re: DEBYUT-M
 

Hi, I will run some test games this week against different computers. I played several blitz-5min games today myself and by the feeling its strength is close to Excalibur Grandmaster which I had faced past week... But we have to keep in mind that 8086 at 5Mhz has a perfomance of 6502 at only 2Mhz, so unit's hardware is quite weak...

By the way: which time control could be suggested according to DEBYUT's design of levels for so-called Active chess?

Unit's dimensions: 26x23x3,5 cm

AW: DEBYUT-M
 

level with 15 min per 40 moves would result in 22,5 s per move
level with 30 min per 40 moves would result in 45 s per move

I think that means average. To avoid disadvantage I would give it 30 minutes respective 45 seconds per move. :)

AW: Re: DEBYUT-M
 

If the 8086 is running without hinderance, then I would estimate 5 MHz as slightly more than 4 MHz for a 6502.

Re: DEBYUT-M
 

Hi, thanks for suggestion and info about CPUs; probably TurboKing will be the first opponent as the slowest computer in my small collection.

AW: DEBYUT-M
 

Hello Ivango ,

Very Interesting finding , i am looking forward to see the games
To mine opinion u found a treasure with this Chess Computer :top:

Now we have to wait when a Omikron Bogol 5.0 pops up :yummy:

Kr,Hans

AW: DEBYUT-M
 

Nice find! Thank you very much! :top:

Greets,
Sascha

AW: DEBYUT-M
 

Thank you.

• https://www.schach-computer.info/wik...%D1%82-%D0%9C) - Debut-M (Дебют-М)

Best regards
Micha

Re: DEBYUT-M
 

Hi, put slight corrections to an article please:

Hersteller - Mosenergopribor
Prozessortyp - 16 Bit


+ chessboard size: 18 x 18 cm

Thanks!

AW: DEBYUT-M
 

Hi Ivan, thank you for corrections. Done...

AW: DEBYUT-M
 

6,2 MHz? That would need a 1810BM86M or could the 1810BM86 work overclocked?

AW: DEBYUT-M
 

I can not identify the digits on the oscillator thanks to reflections on the picture. But there is a better picture in the web

http://www.leningrad.su/museum/show_big.php?n=2981

and it suggests a frequency of 6.2 MHz. Although it could be there is a frequency divider... 2:1 or so...

Besides you can see the device is slightly different in some parts. It could be the devices were sold with different frequencies.

Don't ask me why, but I think, this cpu is was NOT produced in russia... it looks like polished and new labelled...?!

Re: DEBYUT-M
 

Hi, CPUs at both pictures are the same for sure; they were produced as many other chips such as RAMs in 1991 (they all are marked 91XX) - there was (and I think, its still in business) a huge production line of microelectronic parts in Minsk, Belarus.

As for CPU's frequency: original 8086 runs up to 10Mhz, so this clone was possibly of a good quality! :cool:

AW: DEBYUT-M
 

1810BM86 is a clone of Intel 8086 which was specified with round about 5 MHz
1810BM86M is a clone of 8086-2 which was specified with max. 8 MHz

The pictures of the debut say 1810BM86 !

I've never seen a 1810BM86 in original, because like mentioned above Robotron favored Siemens SAB clone due to better durability... But pictures in the web show an other case for 1810BM86 which is a kind of "divided" into three "parts". They have 2 cuts on the surface.

Thats why I think the cpus on the both pictures are from other manufacturer and later polished and relabeled with "1810BM86".

Thus it is possible, that cpus are specified with 8 MHz. But I do NOT exclude the possibility that cpus are original from russia and overclocked. Everything is possible... :)

Re: DEBYUT-M
 

Ok, Im not a specialist in electronics at all, so its up to You to tell us all hidden truth about this stuff ;)

AW: DEBYUT-M
 

I think, the 8086 uses an asymmetric clock (the original PC had 4.77 MHz for the cpu with an oscillator of 7.16 MHz.
For 6.2 MHz this would indicate ca. 4.2 MHz für the cpu, well within its characteristics.
I don't know the available chips in Soviet Union of 1991 for consumer parts but perhabs 4 MHz would mean no penalty when accessing ROM?

And the latest bit over computing power was surely not the goal of such a ches computer. Price and reliability were more important.

AW: DEBYUT-M
 

Thank you solwac, a good clue! KR1810GF84 nearby cpu and quartz is a clone of Intel 8284 and contains the clock generator. Datasheet tells us that clock is one third (!) of crystal frequency?! That means, clock is 2 MHz only...

Accessing ROM... one of the eproms on leningrad website show access time of 200 ns, very slow... Pictures in our wiki show russian eproms, I can not identify speed rating.

AW: DEBYUT-M
 

This picture shows a russian eprom KS573RF2

http://electronlibre.x86-guide.com/e...cpu-no371.html

Picture in wiki shows KS573RF4A. Don't know the encoding of speed rate...

https://www.schachcomputer.info/foru...0&d=1468222260

Re: DEBYUT-M
 

Are you sure that on quartz mark says 6,200k and not 16.200k?

AW: DEBYUT-M
 

Double that, I think the original IBM PC has 7.16 MHz crystal frequency and 4.77 MHz clock at the 8088.

200 ns is fast... for a 8086. ;)
Typical ROMs had 450 ns at the end of the eighties.

AW: Re: DEBYUT-M
 

Possible... a third would be 5.4 MHz, thus slightly overclocked only...

solwac, do you have a reference for clock divider? Ok, 200ns is "fast" :D I had in mind that 250 is slowest ever... :o