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IDENTIFICATION SERVEUR : 10.0.97.65 - CLIENT : 54.197.24.206 |
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toinet Site Admin
Inscrit le: 15 Juin 2007 Messages: 2949 Localisation: Le Chesnay, France
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Posté le: Jeu 14 Sep 2017, 14:07 Sujet du message: Stickybear Reading 3.5" (Optimum Resource, 1988) |
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#953 - Another reading eduware from the Weekly Reader Software Company. Thank you Alex for the disk image.
Disk structure
A non-OS 800k 3.5" disk. Bad blocks $56 to $5F
Protection type
A check of the bad blocks, here $56. If it generates an I/O error then we have an original disk, otherwise we have a copy.
How to copy
Boot my copy disk and launch ZZCopy or Photonix II to copy your original disk. Then, store it in a dry and safe place.
How to normalize
Launch Block Warden and
Code: |
Prefix /SB.READING
Follow file LOADER.SYSTEM
At offset $47: B0 -> 90 or
At offset $49: 4C -> 2C
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The disk image is available at http://www.brutaldeluxe.fr/crack/
Reboot and... enjoy,
LoGo
9/2017 |
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toinet Site Admin
Inscrit le: 15 Juin 2007 Messages: 2949 Localisation: Le Chesnay, France
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Posté le: Jeu 14 Sep 2017, 14:08 Sujet du message: |
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And the code...
Code: |
Block: $0027 (39) Volume name: SB.READING Wednesday 14-Sep-17 3:03
Prefix: /SB.READING/
Following: LOADER.SYSTEM, Type SYS, Rel block 1, Byte $000000
1000: AD 30 BF LDA $BF30 -0? 102E: 4F 20 O
1003: 8D 50 20 STA $2050 .P 1030: A2 00 LDX #$00 ".
1006: 8D 56 20 STA $2056 .V 1032: BD 00 41 LDA $4100,X =.A
1009: 20 00 BF JSR $BF00 .? 1035: 9D B5 B7 STA $B7B5,X .57
100C: 80 (read block) . 1038: CA DEX J
100D: 4F 20 O 1039: D0 F7 BNE $1032 Pw
100F: A2 00 LDX #$00 ". 103B: AD 30 BF LDA $BF30 -0?
1011: BD 00 41 LDA $4100,X =.A 103E: 8D 9B B8 STA $B89B ..8
1014: 9D 00 B6 STA $B600,X ..6 1041: 20 00 BF JSR $BF00 .?
1017: CA DEX J 1044: 80 (read block) .
1018: D0 F7 BNE $1011 Pw 1045: 55 20 U
101A: A2 00 LDX #$00 ". 1047: B0 03 BCS $104C 0. ; if ERR, original
101C: BD 00 40 LDA $4000,X =.@ 1049: 4C 00 00 JMP $0000 L.. ; crash if copy
101F: 9D 00 B7 STA $B700,X ..7 104C: 4C 00 B7 JMP $B700 L.7
1022: CA DEX J 104F: 03 50 ORA $50,S .P
1023: D0 F7 BNE $101C Pw 1051: 00 BRK .
1025: A9 6A LDA #$6A )j 1052: 40 RTI @
1027: 8D 53 20 STA $2053 .S 1053: 6B RTL k
102A: 20 00 BF JSR $BF00 .? 1054: 00 BRK .
102D: 80 (read block) . 1055: 03 50 ORA $50,S .P ; S5,D1
1057: 00 BRK . ; buffer $4000
1058: 40 RTI @
1059: 56 00 LSR $00,X V. ; block $56
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