Voir le sujet pr�c�dent :: Voir le sujet suivant |
Auteur |
Message |
toinet
Inscrit le: 15 Juin 2007 Messages: 326 Localisation: Paris, France
|
Post� le: Mer 17 Oct 2007, 21:23 Sujet du message: Spy vs Spy I and II (Avantage, 1984) |
|
|
The well-known characters from the Mad magazine are back on a special version for the Apple II. Both Spy vs Spy and Spy vs Spy II on the same disk, sharing the same protection on track E, sector 0
PROTECTION TYPE
It is a standard 16-sector diskette.
DISK COPY
- Launch Locksmith 6.3 fast disk backup
- Copy the disk
- or, alternatively, use Advanced Demuffin with B942:18
REMOVE THE PROTECTION
Launch your favorite disk editor
Tell the protection routine it is the original disk
- TE/S0/4C: 01 => 00
The next message contains the protection routine disassembly.
Your backup copy is now ready,
Toinet
Derni�re �dition par toinet le Jeu 18 Oct 2007, 10:38; �dit� 1 fois |
|
Revenir en haut de page |
|
![](templates/subSilver/images/spacer.gif) |
toinet
Inscrit le: 15 Juin 2007 Messages: 326 Localisation: Paris, France
|
Post� le: Mer 17 Oct 2007, 21:24 Sujet du message: |
|
|
That is the original protection routine:
Code: |
*
* Spy vs Spy, volume 1 & 2
*
* (c) 1984, Avantage
*
LDX #$60 ; force slot 6
LDA #$56 ; number of tries
STA $01
LOOP1 LDA #$08
DEC $00
BNE LOOP2
DEC $01
BEQ ITSACOPY
LOOP2 LDY $C08C,X
BPL LOOP2
CPY #$FB
BNE LOOP1
BEQ LOOP3
LOOP3 NOP
NOP
LDY $C08C,X
CPY #$08 ; BINGO!
ROL
BCS LOOP4
]LP LDY $C08C,X
BPL ]LP
CPY #$FF
BNE LOOP1
BEQ LOOP3
LOOP4 LDY $C08C,X
BPL LOOP4
STY $00
CMP #$0A
BNE LOOP1
]LP LDA $C08C,X
BPL ]LP
SEC
ROL
AND $00
EOR #$FF
BNE ITSACOPY
LDA #$00 ; protected disk found
RTS
ITSACOPY LDA #$01 ; copy found
RTS
|
|
|
Revenir en haut de page |
|
![](templates/subSilver/images/spacer.gif) |
|