HS Format (Major Stryker)
The Major Stryker high score format is used to store the top ten scores in Major Stryker.
The file begins with a single byte checksum in order to prevent tampering. The checksum is generated by summing all of the bytes in the high score file into a byte value, and throwing away the overflow. The checksum is initially salted with 233.
|BYTE||checksum||Checksum of the file.|
The data consists of a list of ten scores.
|CHAR[...]||score||Player's score. Space (0x20) terminating.|
|CHAR[...]||name||Player's name. \r\n (0x0D, 0x0A) terminating. Maximum 12 characters.|
The list contains an eleventh score which is really just an unnecessarily long end of file marker.
|CHAR||score||Always "1000". Space (0x20) terminating.|
|CHAR||name||Always "..". \r\n (0x0D, 0x0A) terminating.|
This FreeBASIC program will generate a new high score file with whatever names and scores you like, and prefix the proper checksum header.
' Major Stryker High Score Generator. ' ------------------------------------------ ' This program generates a high score file ' with the proper checksum value. ' Declare work variables. Dim Table As String Dim File As String Dim Checksum As Byte ' Change this file path to the location of your Major Stryker high score file. File = "D:\Documents\Games\Stryker\HS.MS1" ' Generate the high score list. ' Change any of the scores and names to the value you desire, ' but keep your scores less than 7 digits and your names ' less that 12 characters long. Table = "" Table = Table + "50000 Hudson " + Chr(13) + Chr(10) Table = Table + "45000 Hicks D. " + Chr(13) + Chr(10) Table = Table + "40000 Vasquez J. " + Chr(13) + Chr(10) Table = Table + "35000 Bishop L. " + Chr(13) + Chr(10) Table = Table + "30000 Apone A. " + Chr(13) + Chr(10) Table = Table + "25000 Spunkmeyer " + Chr(13) + Chr(10) Table = Table + "20000 Dietrich C. " + Chr(13) + Chr(10) Table = Table + "15000 Wierzbowski " + Chr(13) + Chr(10) Table = Table + "10000 Berk C. " + Chr(13) + Chr(10) Table = Table + "5000 Ripley E. " + Chr(13) + Chr(10) Table = Table + "1000 .." + Chr(13) + Chr(10) ' Generate the checksum. ' The checksum simply adds the ASCII value of each character in the high ' score file to a byte value, while throwing away the overflow. ' The checksum value is salted with 233 to make it harder to reverse ' engineer. But that didn't stop me! ;-) Checksum = 233 ' Sum up each character in the file. Dim X As UShort For X = 1 To Len(Table) Checksum = Checksum + Asc(Mid(Table, X, 1)) Next X ' Attach the checksum to the front of the high score list. Table = Chr(Checksum) + Table ' Delete the high score file if it already exists. Kill File ' Open the high score file, store the new list, and save it. Open File For Binary As #1 Put #1, , Table Close #1
This high score format was reverse engineered by TheAlmightyGuru. If you find this information helpful in a project you're working on, please give credit where credit is due. (A link back to this wiki would be nice too!)