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Can you recognize the programmer and therefore the chess computer ...

Hello,

Can you recognize the programmer and therefore the chess computer with just a very few lines of code?
You can try to find the same initial position construction scheme among well-known 6502 programmers.
Please note that one of these programs will be soon emulated.

Code:

first code : 

F000 : 9F E6                    sts     X00E6           

F002 : 71 BF 14                 aim     #$BFX0014       

F005 : 1A                       slp

F006 : 23 22 24 25 21 24 22 23                          

F00E : 40 21 40 21 40 00 00

...

F04E : CE F0 06                 ldx     #$F006      

F051                    LF051:                      

F051 : 3A                       abx                 

F052 : A6 00                    ldaa    $00,x       

F054 : CE 00 80                 ldx     #$0080      

F057 : 3A                       abx                 

F058 : A7 00                    staa    $00,x       

F05A : 88 30                    eora    #$30        

F05C : A7 38                    staa    $38,x       

F05E : 86 20                    ldaa    #$20        

F060 : A7 08                    staa    $08,x       

F062 : 44                       lsra                

F063 : A7 30                    staa    $30,x       

F065 : 5A                       decb                

F066 : 2A E6                    bpl     LF04E       

F068 : 8E 00 FF                 lds     #$00FF      





second code : 

F000 : 01 10 FF F0 11 0F EF F1  

F008 : 0E 21 1F 12 F2 DF E1 EE  

...

F072 : 40 20 30 50 60 30 20 40  

...

FCAC               LFCAC:

FCAC : 8D F0               bsr     LFC9E

FCAE : C6 07               ldab    #$07          

FCB0               LFCB0:

FCB0 : 86 F0               ldaa    #$F0          

FCB2 : 18                  xgdx

FCB3 : A6 72               ldaa    $72,x         

FCB5 : 18                  xgdx

FCB6 : 4F                  clra                  

FCB7 : 18                  xgdx                  

FCB8 : A7 88               staa    $88,x         

FCBA : 8A 80               oraa    #$80          

FCBC : A7 F8               staa    $F8,x         

FCBE : 62 10 98            oim     #$10,$98,x    

FCC1 : 62 90 E8            oim     #$90,$E8,x    

FCC4 : 18                  xgdx

FCC5 : 5A                  decb                  

FCC6 : 2A E8               bpl     LFCB0         

FCC8 : 97 40               staa    X0040

FCCA : CC 8C FC            ldd     #$8CFC        

FCCD : DD 72               std     X0072

...





third code :

F000 :  db      $00, $00, $09, $05  

F004 :  db      $03, $03, $01,      

F007 :  db      $0F, $F1, $11, $EF, 

F00B :  db      $06, $FA, $0A, $F6, 

F00F :  db      $09, $F7, $07, $F9, 

F013 :  db      $F8, $01, $08, $FF, 

F017 :  db      $01, $F8, $10, $F9, 

F01B :  db      $06, $0A, $08, $04, 

        db      $02, $08, $0A, $06, 



        ldx     #$F022  

LF69A:                             

        pshx                   

        ldaa    $00,x          

        ldx     #$0000         

        abx                    

        staa    $80,x          

        oim     #$0C,$81,x     

        oim     #$0D,$86,x     

        inca                   

        staa    $87,x          

        pulx                   

        dex                    

        subb    #$08           

        bpl     LF69A          

        ...

good luck !

Cordialy.

AW: Can you recognize the programmer and therefore the chess computer ...

Zitieren:

Zitat von Mychess (Beitrag 120824)

Hello,

Can you recognize the programmer and therefore the chess computer with just a very few lines of code?

No, I can't.

Zitieren:

Zitat von Mychess (Beitrag 120824)

Please note that one of these programs will be soon emulated.

Well, how about Kaare Danielsen ?

Regards
Hans-Jürgen

Re: AW: Can you recognize the programmer and therefore the chess computer ...

Zitieren:

Zitat von CC 7 (Beitrag 120839)

No, I can't.

Well, how about Kaare Danielsen ?

Regards
Hans-Jürgen

Hi,
One of these programs was written by Kaare Danielsen : But which one?
More importantly, what arguments did you use to determine it?

Cordially.

AW: Can you recognize the programmer and therefore the chess computer ...

Hi,

the 3rd is by Danielsen, Explorer / Companion 2 code, working the table backwards.
Piece ordering K to p:
White even: 02 04 06 08 0A 0C
Black odd: 03 05 07 09 0B 0D
Orientation in ram 0080: A1-A8 -> 00B8: H1-H8
I always considered board representation and initial position construction very programmer specific.
Nice examples. For the other one's I would have to take more time, I'm a bit rusty with chess code at the moment.

Best,
Michael

Re: AW: Can you recognize the programmer and therefore the chess computer ...

Zitieren:

Zitat von bataais (Beitrag 121934)

Hi,

Nice examples. For the other one's I would have to take more time, I'm a bit rusty with chess code at the moment.
Michael

Hello Bataais,

However, only one line can give you an immediate solution : it must be obvious to you.

Cordially

PS what you think about that : 04 0C 0D 15 25 28

AW: Can you recognize the programmer and therefore the chess computer ...

Ah, the 1st one looks like Kittinger

Code:

23 22 24 25 21 24 22 23

20 20 20 20 20 20 20 20

00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00

10 10 10 10 10 10 10 10

13 12 14 15 11 14 12 13

Cheers!

Re: AW: Can you recognize the programmer and therefore the chess computer ...

Zitieren:

Zitat von bataais (Beitrag 121936)

Ah, the 1st one looks like Kittinger

Code:

23 22 24 25 21 24 22 23

20 20 20 20 20 20 20 20

00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00

10 10 10 10 10 10 10 10

13 12 14 15 11 14 12 13

Cheers!

Congratulations!
Is the last one from DK, KD, another ? ;-)

Cordially.

AW: Can you recognize the programmer and therefore the chess computer ...

The 2nd code looks more similar to Danielsen's, with the two

Code:

FCBE : 62 10 98            oim     #$10,$98,x    

FCC1 : 62 90 E8            oim     #$90,$E8,x

compared to Companion II's

Code:

        oim     #$0C,$81,x     

        oim     #$0D,$86,x

but the board representation is totally different. So not yet sure who programmed it. Maybe Frans Morsch ;)

I think these 3 code snippets are all HD6301,
Constellation Junior, Yeno 301XL, and Companion II.

Right?

Re: AW: Can you recognize the programmer and therefore the chess computer ...

Zitieren:

Zitat von bataais (Beitrag 121940)

The 2nd code looks more similar to Danielsen's, with the two

Code:

FCBE : 62 10 98            oim     #$10,$98,x    

FCC1 : 62 90 E8            oim     #$90,$E8,x

compared to Companion II's

Code:

        oim     #$0C,$81,x     

        oim     #$0D,$86,x

I knew that with you it wouldn't last long : you have find everything !
So your prize :04 0C 0D 15 25 28 are the values of pieces (1 pawn is 4 quaters) in Yeno 301XL (do you already know that ?).

End of the riddle.

Cordially.

AW: Can you recognize the programmer and therefore the chess computer ...

Thanks Olivier,
that was fun.

Zitieren:

So your prize :04 0C 0D 15 25 28 are the values of pieces (1 pawn is 4 quaters) in Yeno 301XL (do you already know that ?).

I didn't know that, I don't have the rom dumps yet (to peek inside the disassemblies).

Best regards,
bataais