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#1
05.11.2023, 17:16
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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
...
Cordialy. 
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| Folgende 2 Benutzer sagen Danke zu Mychess für den nützlichen Beitrag: | ||
kamoj (06.11.2023) | ||
#2
06.11.2023, 02:44
| Folgender Benutzer sagt Danke zu CC 7 für den nützlichen Beitrag: | ||
kamoj (06.12.2023) | ||
#3
06.11.2023, 21:58
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Re: AW: Can you recognize the programmer and therefore the chess computer ...
 Zitat von CC 7
No, I can't.
Well, how about Kaare Danielsen ? Regards Hans-Jürgen One of these programs was written by Kaare Danielsen : But which one? More importantly, what arguments did you use to determine it? Cordially.
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| Folgender Benutzer sagt Danke zu Mychess für den nützlichen Beitrag: | ||
kamoj (06.12.2023) | ||
#4
06.12.2023, 11:17
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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
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#5
06.12.2023, 11:28
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Re: AW: Can you recognize the programmer and therefore the chess computer ...
Zitat von bataais
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 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
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| Folgender Benutzer sagt Danke zu Mychess für den nützlichen Beitrag: | ||
kamoj (06.12.2023) | ||
#6
06.12.2023, 11:37
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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
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| Folgender Benutzer sagt Danke zu bataais für den nützlichen Beitrag: | ||
kamoj (06.12.2023) | ||
#7
06.12.2023, 11:53
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Re: AW: Can you recognize the programmer and therefore the chess computer ...
Zitat von bataais
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 Is the last one from DK, KD, another ? ;-) Cordially.
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| Folgender Benutzer sagt Danke zu Mychess für den nützlichen Beitrag: | ||
kamoj (06.12.2023) | ||
#8
06.12.2023, 12:42
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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 Code:
oim #$0C,$81,x
oim #$0D,$86,x
 I think these 3 code snippets are all HD6301, Constellation Junior, Yeno 301XL, and Companion II. Right?
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#9
06.12.2023, 13:40
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Re: AW: Can you recognize the programmer and therefore the chess computer ...
Zitat von bataais
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 Code:
oim #$0C,$81,x
oim #$0D,$86,x
I think these 3 code snippets are all HD6301, Constellation Junior, Yeno 301XL, and Companion II. Right? 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.
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| Folgender Benutzer sagt Danke zu Mychess für den nützlichen Beitrag: | ||
kamoj (07.12.2023) | ||
#10
06.12.2023, 13:50
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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 ?).
Best regards, bataais
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| Folgender Benutzer sagt Danke zu bataais für den nützlichen Beitrag: | ||
kamoj (07.12.2023) | ||
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