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toinet
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Inscrit le: 15 Juin 2007
Messages: 2945
Localisation: Le Chesnay, France
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 Posté le: Ven 08 Sep 2017, 19:47 Sujet du message: Classmate v2.11 3.5" (Davidson, 1987) |
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#941 - When it is not written in Forth, it is in compiled BASIC and Davidson uses the same protection scheme for their eduware. Here, a classroom management system.
Disk structure
This is a nearly standard ProDOS 3.5" disk where a bad block is present (#$0308). If the bad block is a good block, then the error code #$00 is returned and the program quits.
How to copy
Use ZZCopy or Photonix II to copy your original disk. Then, store it in a dry and safe place.
How to crack
When I meet a Davidson title, I open the binary files, here there are two (INPUT.ANYTHING and X.0). The first one is an input type program and X.0 is the protection check, see below.
So, launch Block.Warden
Prefix /CLASSMATE
Follow file X.0
At offset $6F: 90 0C becomes A9 27
Save the block back onto disk.
Here, we replace the no error branch with the standard and awaited error code #$27 in the accumulator)
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: 2945
Localisation: Le Chesnay, France
|
| Posté le: Ven 08 Sep 2017, 19:48 Sujet du message: |
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The Block.Warden views
| Code: |
Block: $0049 (73) Volume name: CLASSMATE Thursday 8-Sep-17 8:37
Prefix: /CLASSMATE/
Following: X.0, Type BIN, Rel block 1, Byte $000000
1000: 08 PHP . 101C: A9 00 LDA #$00 ).
1001: 48 PHA H 101E: 85 F8 STA $F8 .x
1002: 98 TYA . 1020: A0 01 LDY #$01 .
1003: 48 PHA H 1022: B1 F8 LDA ($F8),Y 1x
1004: 8A TXA . 1024: C9 20 CMP #$20 I
1005: 48 PHA H 1026: D0 22 BNE $104A P"
1006: A5 F8 LDA $F8 %x 1028: A0 03 LDY #$03 .
1008: 48 PHA H 102A: B1 F8 LDA ($F8),Y 1x
1009: A5 F9 LDA $F9 %y 102C: D0 1C BNE $104A P.
100B: 48 PHA H 102E: A0 05 LDY #$05 .
100C: A5 FA LDA $FA %z 1030: B1 F8 LDA ($F8),Y 1x
100E: 48 PHA H 1032: C9 03 CMP #$03 I.
100F: AD 30 BF LDA $BF30 -0? 1034: D0 14 BNE $104A P.
1012: 4A LSR J 1036: A0 FF LDY #$FF
1013: 4A LSR J 1038: B1 F8 LDA ($F8),Y 1x
1014: 4A LSR J 103A: D0 0E BNE $104A P.
1015: 4A LSR J 103C: A9 10 LDA #$10 ).
1016: 29 07 AND #$07 ). 103E: 8D 04 22 STA $2204 .."
1018: 09 C0 ORA #$C0 .@ 1041: A9 01 LDA #$01 ).
101A: 85 F9 STA $F9 .y 1043: 8D 05 22 STA $2205 .."
Block: $0049 (73) Volume name: CLASSMATE Thursday 8-Sep-17 8:37
Prefix: /CLASSMATE/
Following: X.0, Type BIN, Rel block 1, Byte $000000
1046: D0 0C BNE $1054 P. 1075: D0 06 BNE $107D P.
1048: F0 0A BEQ $1054 p. 1077: A9 FF LDA #$FF )
104A: A9 08 LDA #$08 ). 1079: 85 FF STA $FF .
104C: 8D 04 22 STA $2204 .." 107B: D0 04 BNE $1081 P.
104F: A9 03 LDA #$03 ). 107D: A9 00 LDA #$00 ).
1051: 8D 05 22 STA $2205 .." 107F: 85 FF STA $FF .
1054: AD 30 BF LDA $BF30 -0? 1081: 68 PLA h
1057: 8D 01 22 STA $2201 .." 1082: 85 FA STA $FA .z
105A: A9 03 LDA #$03 ). 1084: 68 PLA h
105C: 8D 00 22 STA $2200 .." 1085: 85 F9 STA $F9 .y
105F: A9 00 LDA #$00 ). 1087: 68 PLA h
1061: 8D 02 22 STA $2202 .." 1088: 85 F8 STA $F8 .x
1064: A9 20 LDA #$20 ) 108A: 68 PLA h
1066: 8D 03 22 STA $2203 .." 108B: AA TAX *
1069: 20 00 BF JSR $BF00 .? 108C: 68 PLA h
106C: 80 (read block) . 108D: A8 TAY (
106D: 00 22 ." 108E: 68 PLA h
106F: 90 0C BCC $107D .. 108F: 28 PLP (
1071: 85 FA STA $FA .z 1090: 60 RTS `
1073: C9 27 CMP #$27 I' 1091: 00 BRK .
Block: $0049 (73) Volume name: CLASSMATE Thursday 8-Sep-17 8:38
Prefix: /CLASSMATE/
Following: X.0, Type BIN, Rel block 1, Byte $00006F
(c) Q 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F Edit mode
1988ZSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
Z 000: 08 48 98 48 8A 48 A5 F8 48 A5 F9 48 A5 FA 48 AD .H.H.H%xH%yH%zH-
b Z 010: 30 BF 4A 4A 4A 4A 29 07 09 C0 85 F9 A9 00 85 F8 0?JJJJ)..@.y)..x
B y Z 020: A0 01 B1 F8 C9 20 D0 22 A0 03 B1 F8 D0 1C A0 05 .1xI P" .1xP. .
L Z 030: B1 F8 C9 03 D0 14 A0 FF B1 F8 D0 0E A9 10 8D 04 1xI.P. 1xP.)...
O G Z 040: 22 A9 01 8D 05 22 D0 0C F0 0A A9 08 8D 04 22 A9 ")..."P.p.)...")
C l Z 050: 03 8D 05 22 AD 30 BF 8D 01 22 A9 03 8D 00 22 A9 ..."-0?..")...")
K e Z 060: 00 8D 02 22 A9 20 8D 03 22 20 00 BF 80 00 22 90 ...") .." .?..".
n Z 070: 0C 85 FA C9 27 D0 06 A9 FF 85 FF D0 04 A9 00 85 ..zI'P.).P.)..
W Z 080: FF 68 85 FA 68 85 F9 68 85 F8 68 AA 68 A8 68 28 h.zh.yh.xh*h(h(
A B Z 090: 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 `...............
R r Z 0A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
D e Z 0B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
E d Z 0C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
N o Z 0D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
n Z 0E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Z 0F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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