CPS-2 Shock

Report Six
The information on this page has been obtained by using a EEPROM emulator to replace the first program ROM on a CPS-2 game board (Street Fighter Zero). Without the kind donations from people within the emulation community this information would still be unavailable.

What you are about to see in the table below is encrypted values from #$0000 to #$00FF and their non encrypted form. This information comes from a single address space within the ROM. Some values are blank, this is due to the CPS-2 CPU not being able to address certain memory areas.

Address used : $000174

Encrypted Values Non Encrypted Values

Value Binary Value Binary

0000 0001 0002 0003 0004 0005 0006 0007 0008 0009 000A 000B 000C 000D 000E 000F 0010 0011 0012 0013 0014 0015 0016 0017 0018 0019 001A 001B 001C 001D 001E 001F 0020 0021 0022 0023 0024 0025 0026 0027 0028 0029 002A 002B 002C 002D 002E 002F 0030 0031 0032 0033 0034 0035 0036 0037 0038 0039 003A 003B 003C 003D 003E 003F 0040 0041 0042 0043 0044 0045 0046 0047 0048 0049 004A 004B 004C 004D 004E 004F 0050 0051 0052 0053 0054 0055 0056 0057 0058 0059 005A 005B 005C 005D 005E 005F 0060 0061 0062 0063 0064 0065 0066 0067 0068 0069 006A 006B 006C 006D 006E 006F 0070 0071 0072 0073 0074 0075 0076 0077 0078 0079 007A 007B 007C 007D 007E 007F 0080 0081 0082 0083 0084 0085 0086 0087 0088 0089 008A 008B 008C 008D 008E 008F 0090 0091 0092 0093 0094 0095 0096 0097 0098 0099 009A 009B 009C 009D 009E 009F 00A0 00A1 00A2 00A3 00A4 00A5 00A6 00A7 00A8 00A9 00AA 00AB 00AC 00AD 00AE 00AF 00B0 00B1 00B2 00B3 00B4 00B5 00B6 00B7 00B8 00B9 00BA 00BB 00BC 00BD 00BE 00BF 00C0 00C1 00C2 00C3 00C4 00C5 00C6 00C7 00C8 00C9 00CA 00CB 00CC 00CD 00CE 00CF 00D0 00D1 00D2 00D3 00D4 00D5 00D6 00D7 00D8 00D9 00DA 00DB 00DC 00DD 00DE 00DF 00E0 00E1 00E2 00E3 00E4 00E5 00E6 00E7 00E8 00E9 00EA 00EB 00EC 00ED 00EE 00EF 00F0 00F1 00F2 00F3 00F4 00F5 00F6 00F7 00F8 00F9 00FA 00FB 00FC 00FD 00FE 00FF 0000000000000000 0000000000000001 0000000000000010 0000000000000011 0000000000000100 0000000000000101 0000000000000110 0000000000000111 0000000000001000 0000000000001001 0000000000001010 0000000000001011 0000000000001100 0000000000001101 0000000000001110 0000000000001111 0000000000010000 0000000000010001 0000000000010010 0000000000010011 0000000000010100 0000000000010101 0000000000010110 0000000000010111 0000000000011000 0000000000011001 0000000000011010 0000000000011011 0000000000011100 0000000000011101 0000000000011110 0000000000011111 0000000000100000 0000000000100001 0000000000100010 0000000000100011 0000000000100100 0000000000100101 0000000000100110 0000000000100111 0000000000101000 0000000000101001 0000000000101010 0000000000101011 0000000000101100 0000000000101101 0000000000101110 0000000000101111 0000000000110000 0000000000110001 0000000000110010 0000000000110011 0000000000110100 0000000000110101 0000000000110110 0000000000110111 0000000000111000 0000000000111001 0000000000111010 0000000000111011 0000000000111100 0000000000111101 0000000000111110 0000000000111111 0000000001000000 0000000001000001 0000000001000010 0000000001000011 0000000001000100 0000000001000101 0000000001000110 0000000001000111 0000000001001000 0000000001001001 0000000001001010 0000000001001011 0000000001001100 0000000001001101 0000000001001110 0000000001001111 0000000001010000 0000000001010001 0000000001010010 0000000001010011 0000000001010100 0000000001010101 0000000001010110 0000000001010111 0000000001011000 0000000001011001 0000000001011010 0000000001011011 0000000001011100 0000000001011101 0000000001011110 0000000001011111 0000000001100000 0000000001100001 0000000001100010 0000000001100011 0000000001100100 0000000001100101 0000000001100110 0000000001100111 0000000001101000 0000000001101001 0000000001101010 0000000001101011 0000000001101100 0000000001101101 0000000001101110 0000000001101111 0000000001110000 0000000001110001 0000000001110010 0000000001110011 0000000001110100 0000000001110101 0000000001110110 0000000001110111 0000000001111000 0000000001111001 0000000001111010 0000000001111011 0000000001111100 0000000001111101 0000000001111110 0000000001111111 0000000010000000 0000000010000001 0000000010000010 0000000010000011 0000000010000100 0000000010000101 0000000010000110 0000000010000111 0000000010001000 0000000010001001 0000000010001010 0000000010001011 0000000010001100 0000000010001101 0000000010001110 0000000010001111 0000000010010000 0000000010010001 0000000010010010 0000000010010011 0000000010010100 0000000010010101 0000000010010110 0000000010010111 0000000010011000 0000000010011001 0000000010011010 0000000010011011 0000000010011100 0000000010011101 0000000010011110 0000000010011111 0000000010100000 0000000010100001 0000000010100010 0000000010100011 0000000010100100 0000000010100101 0000000010100110 0000000010100111 0000000010101000 0000000010101001 0000000010101010 0000000010101011 0000000010101100 0000000010101101 0000000010101110 0000000010101111 0000000010110000 0000000010110001 0000000010110010 0000000010110011 0000000010110100 0000000010110101 0000000010110110 0000000010110111 0000000010111000 0000000010111001 0000000010111010 0000000010111011 0000000010111100 0000000010111101 0000000010111110 0000000010111111 0000000011000000 0000000011000001 0000000011000010 0000000011000011 0000000011000100 0000000011000101 0000000011000110 0000000011000111 0000000011001000 0000000011001001 0000000011001010 0000000011001011 0000000011001100 0000000011001101 0000000011001110 0000000011001111 0000000011010000 0000000011010001 0000000011010010 0000000011010011 0000000011010100 0000000011010101 0000000011010110 0000000011010111 0000000011011000 0000000011011001 0000000011011010 0000000011011011 0000000011011100 0000000011011101 0000000011011110 0000000011011111 0000000011100000 0000000011100001 0000000011100010 0000000011100011 0000000011100100 0000000011100101 0000000011100110 0000000011100111 0000000011101000 0000000011101001 0000000011101010 0000000011101011 0000000011101100 0000000011101101 0000000011101110 0000000011101111 0000000011110000 0000000011110001 0000000011110010 0000000011110011 0000000011110100 0000000011110101 0000000011110110 0000000011110111 0000000011111000 0000000011111001 0000000011111010 0000000011111011 0000000011111100 0000000011111101 0000000011111110 0000000011111111 0 1 1 2 1 2 2 3 1 2 2 3 2 3 3 4 1 2 2 3 2 3 3 4 2 3 3 4 3 4 4 5 1 2 2 3 2 3 3 4 2 3 3 4 3 4 4 5 2 3 3 4 3 4 4 5 3 4 4 5 4 5 5 6 1 2 2 3 2 3 3 4 2 3 3 4 3 4 4 5 2 3 3 4 3 4 4 5 3 4 4 5 4 5 5 6 2 3 3 4 3 4 4 5 3 4 4 5 4 5 5 6 3 4 4 5 4 5 5 6 4 5 5 6 5 6 6 7 1 2 2 3 2 3 3 4 2 3 3 4 3 4 4 5 2 3 3 4 3 4 4 5 3 4 4 5 4 5 5 6 2 3 3 4 3 4 4 5 3 4 4 5 4 5 5 6 3 4 4 5 4 5 5 6 4 5 5 6 5 6 6 7 2 3 3 4 3 4 4 5 3 4 4 5 4 5 5 6 3 4 4 5 4 5 5 6 4 5 5 6 5 6 6 7 3 4 4 5 4 5 5 6 4 5 5 6 5 6 6 7 4 5 5 6 5 6 6 7 5 6 6 7 6 7 7 8 EF40 B703 D512 6284 A838 89CB 7842 47DF F704 6188 ---- 299F 8A14 9BA5 4C39 6C15 2F4B ---- ADE6 538C FEEA ---- 1D95 750E 3E2C AB60 FB38 F98D 6499 4DC5 9898 F382 3830 BE02 EA00 F202 98EF F118 15B9 FE48 ---- ---- 6BDA CF89 1BA1 ---- E537 2BEF C71D C73D 6709 CF92 20E5 A9C9 5A9E 873D 6AD7 6AF7 2216 8099 A0B1 C22E 9591 DB04 B231 ---- 65F8 0740 B7B2 FEC1 5B87 8948 0B0B 85DE A887 7B87 B5F4 E5AD 5123 8D61 7A8E A3A3 C699 3302 6321 620E A1A0 1C26 F500 E604 ---- 3A23 ---- 03E8 51C0 272A 0A70 FB09 201E 0349 EEE5 F1F2 7034 A1E2 ---- ---- 8D70 B20B F4A9 70DD 981B ---- ---- BF70 3611 ED1E EE08 B422 09F6 0816 81B0 5491 ---- 6F97 66DB ---- 008C 8499 A796 67C5 ---- 353C 2DC7 BC24 9332 08CF 203B 6FC5 ---- ---- CE2F A9B8 4CE4 6EEE B5C7 D130 AEAC 98AA D12B ---- 7517 958D 8141 CBC8 EA8D BC85 C2E5 5B81 551A 9CE5 77E1 EBD6 8914 BB2C F903 6B29 6520 D92F A3E8 691A 8110 1ADE D3E0 6198 140A 6EE7 2D25 D039 A7A5 ---- 2684 2949 619D AD09 C160 ---- BA27 C93E AC99 0644 41BC EEE4 6FED B01C AB87 A6A6 9228 ---- 4ACB AA4C 298D FEB0 29C3 ---- AD8E ---- ---- 9EF2 9EC3 9C84 F82D 61C2 444D 4929 7AE3 ---- B5CF 05FC ED60 42A0 8D03 5545 0839 720D B03C 22CD 0015 72AB 9C28 9401 DB01 3EEB FAF9 64A5 1332 89F2 C688 938D A896 B7FB DB83 CCA0 72EB 61CB ---- 4C70 1404 6787 7548 09F5 F92C 104D DD12 0319 E74E 73A2 1110111101000000 1011011100000011 1101010100010010 0110001010000100 1010100000111000 1000100111001011 0111100001000010 0100011111011111 1111011100000100 0110000110001000 ---------------- 0010100110011111 1000101000010100 1001101110100101 0100110000111001 0110110000010101 0010111101001011 ---------------- 1010110111100110 0101001110001100 1111111011101010 ---------------- 0001110110010101 0111010100001110 0011111000101100 1010101101100000 1111101100111000 1111100110001101 0110010010011001 0100110111000101 1001100010011000 1111001110000010 0011100000110000 1011111000000010 1110101000000000 1111001000000010 1001100011101111 1111000100011000 0001010110111001 1111111001001000 ---------------- ---------------- 0110101111011010 1100111110001001 0001101110100001 ---------------- 1110010100110111 0010101111101111 1100011100011101 1100011100111101 0110011100001001 1100111110010010 0010000011100101 1010100111001001 0101101010011110 1000011100111101 0110101011010111 0110101011110111 0010001000010110 1000000010011001 1010000010110001 1100001000101110 1001010110010001 1101101100000100 1011001000110001 ---------------- 0110010111111000 0000011101000000 1011011110110010 1111111011000001 0101101110000111 1000100101001000 0000101100001011 1000010111011110 1010100010000111 0111101110000111 1011010111110100 1110010110101101 0101000100100011 1000110101100001 0111101010001110 1010001110100011 1100011010011001 0011001100000010 0110001100100001 0110001000001110 1010000110100000 0001110000100110 1111010100000000 1110011000000100 ---------------- 0011101000100011 ---------------- 0000001111101000 0101000111000000 0010011100101010 0000101001110000 1111101100001001 0010000000011110 0000001101001001 1110111011100101 1111000111110010 0111000000110100 1010000111100010 ---------------- ---------------- 1000110101110000 1011001000001011 1111010010101001 0111000011011101 1001100000011011 ---------------- ---------------- 1011111101110000 0011011000010001 1110110100011110 1110111000001000 1011010000100010 0000100111110110 0000100000010110 1000000110110000 0101010010010001 ---------------- 0110111110010111 0110011011011011 ---------------- 0000000010001100 1000010010011001 1010011110010110 0110011111000101 ---------------- 0011010100111100 0010110111000111 1011110000100100 1001001100110010 0000100011001111 0010000000111011 0110111111000101 ---------------- ---------------- 1100111000101111 1010100110111000 0100110011100100 0110111011101110 1011010111000111 1101000100110000 1010111010101100 1001100010101010 1101000100101011 ---------------- 0111010100010111 1001010110001101 1000000101000001 1100101111001000 1110101010001101 1011110010000101 1100001011100101 0101101110000001 0101010100011010 1001110011100101 0111011111100001 1110101111010110 1000100100010100 1011101100101100 1111100100000011 0110101100101001 0110010100100000 1101100100101111 1010001111101000 0110100100011010 1000000100010000 0001101011011110 1101001111100000 0110000110011000 0001010000001010 0110111011100111 0010110100100101 1101000000111001 1010011110100101 ---------------- 0010011010000100 0010100101001001 0110000110011101 1010110100001001 1100000101100000 ---------------- 1011101000100111 1100100100111110 1010110010011001 0000011001000100 0100000110111100 1110111011100100 0110111111101101 1011000000011100 1010101110000111 1010011010100110 1001001000101000 ---------------- 0100101011001011 1010101001001100 0010100110001101 1111111010110000 0010100111000011 ---------------- 1010110110001110 ---------------- ---------------- 1001111011110010 1001111011000011 1001110010000100 1111100000101101 0110000111000010 0100010001001101 0100100100101001 0111101011100011 ---------------- 1011010111001111 0000010111111100 1110110101100000 0100001010100000 1000110100000011 0101010101000101 0000100000111001 0111001000001101 1011000000111100 0010001011001101 0000000000010101 0111001010101011 1001110000101000 1001010000000001 1101101100000001 0011111011101011 1111101011111001 0110010010100101 0001001100110010 1000100111110010 1100011010001000 1001001110001101 1010100010010110 1011011111111011 1101101110000011 1100110010100000 0111001011101011 0110000111001011 ---------------- 0100110001110000 0001010000000100 0110011110000111 0111010101001000 0000100111110101 1111100100101100 0001000001001101 1101110100010010 0000001100011001 1110011101001110 0111001110100010 8 8 7 5 6 8 6 11 8 5 - 9 5 9 7 7 9 - 10 7 12 - 8 8 8 7 10 10 7 8 6 8 5 7 5 6 10 7 8 9 - - 10 9 7 - 10 11 9 10 7 9 6 8 9 9 10 11 5 5 6 7 7 7 7 - 9 4 10 10 9 5 6 9 7 10 10 10 6 7 9 8 8 5 6 6 5 6 6 6 - 7 - 6 5 7 5 9 5 5 11 10 6 7 - - 7 7 9 9 7 - - 10 6 10 7 6 8 4 5 6 - 11 10 - 3 6 9 9 - 8 9 7 7 7 6 10 - - 10 8 7 11 10 6 9 7 8 - 9 8 4 8 9 8 8 7 7 9 10 11 5 9 8 8 5 10 8 7 3 9 8 6 4 11 7 7 9 - 5 6 8 7 5 - 9 9 8 4 7 10 12 6 9 8 5 - 8 7 7 10 7 - 9 - - 10 9 6 9 6 6 6 10 - 11 8 8 4 6 7 5 7 7 7 3 9 6 4 7 11 12 7 6 8 6 8 7 13 9 6 10 8 - 6 3 9 7 8 9 5 8 5 10 8

The amount of bits set in each value are colored blue. Those of you who know about encryption will notice that from these values one can be sure to say that the algorithm is more complex than just XOR and bitswaps.

Remember all these values are from one address only. Putting the same numbers through the next available memory address ($000176) causes all the non encrypted values to change. This is totally expected.

Here is another table for the same address showing results on values with a single bit set. Again some are blank due to addressing errors.

Address used : $000174

Encrypted Values Non Encrypted Values

Value Binary Value Binary

0001 0002 0004 0008 0010 0020 0040 0080 0100 0200 0400 0800 1000 2000 4000 8000 0000000000000001 0000000000000010 0000000000000100 0000000000001000 0000000000010000 0000000000100000 0000000001000000 0000000010000000 0000000100000000 0000001000000000 0000010000000000 0000100000000000 0001000000000000 0010000000000000 0100000000000000 1000000000000000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 B703 D512 A838 F704 2F4B 3830 B231 A796 EC26 39EE F2C2 ---- 0721 ---- ---- ---- 1011011100000011 1101010100010010 1010100000111000 1111011100000100 0010111101001011 0011100000110000 1011001000110001 1010011110010110 1110110000100110 0011100111101110 1111001011000010 ---------------- 0000011100100001 ---------------- ---------------- ---------------- 8 7 6 8 9 5 7 9 8 10 8 - 5 - - -