mirror of
https://github.com/holub/mame
synced 2025-06-07 13:23:50 +03:00
revised seibu decryption
This commit is contained in:
Nicola Salmoria
parent
44adafa214
commit
e3f46cc902
@ -1297,7 +1297,7 @@ INPUT_PORTS_END
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#define PLANE_CHAR 0
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#define PLANE_TILE 0
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#define PLANE_SPRITE 1
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#define PLANE_SPRITE 0
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static const gfx_layout spi_charlayout =
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{
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@ -27,7 +27,7 @@ custom IC on startup!! (writes to 000414)
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// add two numbers generating carry from one bit to the next only if
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// the corresponding bit in carry_mask is 1
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static int partial_carry_sum(int add1,int add2,int carry_mask,int bits)
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static UINT32 partial_carry_sum(UINT32 add1,UINT32 add2,UINT32 carry_mask,int bits)
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{
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int i,res,carry;
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@ -53,21 +53,21 @@ static int partial_carry_sum(int add1,int add2,int carry_mask,int bits)
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return res;
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}
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static int partial_carry_sum24(int add1,int add2,int carry_mask)
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static UINT32 partial_carry_sum32(UINT32 add1,UINT32 add2,UINT32 carry_mask)
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{
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return partial_carry_sum(add1,add2,carry_mask,32);
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}
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static UINT32 partial_carry_sum24(UINT32 add1,UINT32 add2,UINT32 carry_mask)
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{
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return partial_carry_sum(add1,add2,carry_mask,24);
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}
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static int partial_carry_sum16(int add1,int add2,int carry_mask)
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static UINT32 partial_carry_sum16(UINT32 add1,UINT32 add2,UINT32 carry_mask)
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{
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return partial_carry_sum(add1,add2,carry_mask,16);
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}
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static int partial_carry_sum8(int add1,int add2,int carry_mask)
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{
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return partial_carry_sum(add1,add2,carry_mask,8);
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}
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static UINT32 decrypt_tile(UINT32 val, int tileno, UINT32 key1, UINT32 key2, UINT32 key3)
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@ -183,31 +183,28 @@ void seibuspi_rise11_bg_decrypt(UINT8 *rom, int size)
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static int dec12(int val)
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{
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return partial_carry_sum16( val, 0x018a, 0x018a ) ^ 0xccd8;
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}
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/******************************************************************************************
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static int dec3(int val)
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{
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return partial_carry_sum8( val, 0x05, 0x1d ) ^ 0x6c;
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}
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rdft2
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static int dec4(int val)
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{
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return partial_carry_sum8( val, 0x42, 0x46 ) ^ 0xa2;
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}
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 00000000 & 0000FFFF
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 0000ABCB & 0000FFFF // okok
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 0000ABCB & 0000FFFF // duplicate
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 00006543 & 0000FFFF // okok
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 000021D9 & 0000FFFF // ok??
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 00006655 & 0000FFFF // okok
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 000099AA & 0000FFFF // okok
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 00006655 & 0000FFFF // duplicate
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 000099AA & 0000FFFF // duplicate
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 00000C1D & 0000FFFF // okok
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 0000A346 & 0000FFFF // okok
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 00005237 & 0000FFFF // okok
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CPU 'main' (PC=002A0709): unmapped program memory dword write to 0000054C = 0000A948 & 0000FFFF // okok
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static int dec5(int val)
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{
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return partial_carry_sum8( val, 0x21, 0x27 ) ^ 0x52;
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}
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static int dec6(int val)
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{
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return partial_carry_sum8( val, 0x08, 0x08 ) ^ 0x3a;
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}
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plane54 = partial_carry_sum16( plane54, 0xabcb, 0x55aa ) ^ 0x6699;
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plane3210 = partial_carry_sum32( plane3210, 0x654321d9 ^ 0x42, 0x1d463748 ) ^ 0x0ca352a9;
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******************************************************************************************/
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static void sprite_reorder(UINT8 *buffer)
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{
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@ -222,41 +219,38 @@ static void sprite_reorder(UINT8 *buffer)
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memcpy(buffer, temp, 64);
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}
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/* actually this is for the 2000 version - original version might be different */
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void seibuspi_rise10_sprite_decrypt(UINT8 *rom, int size)
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{
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int i,j;
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int s = size/2;
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int i;
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for( i=0; i < s; i+=32 ) {
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sprite_reorder(&rom[2*i]);
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sprite_reorder(&rom[2*(s+i)]);
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sprite_reorder(&rom[2*((s*2)+i)]);
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for( j=0; j < 32; j++ ) {
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int b1,b2;
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int d12,d3,d4,d5,d6;
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for (i = 0; i < size/2; i++)
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{
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UINT32 plane54,plane3210;
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b1 = rom[2*((s*2)+i+j)] + (rom[2*((s*2)+i+j)+1] << 8) + (rom[2*(s+i+j)] << 16) + (rom[2*(s+i+j)+1] << 24);
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b1 = BITSWAP32(b1,
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7,31,26,0,18,9,19,8,
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27,6,15,21,1,28,10,20,
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plane54 = rom[0*size+2*i] + (rom[0*size+2*i+1] << 8);
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plane3210 = BITSWAP32(
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rom[2*size+2*i] + (rom[2*size+2*i+1] << 8) + (rom[1*size+2*i] << 16) + (rom[1*size+2*i+1] << 24),
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23,13,24,4,16,12,25,30,
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3,5,29,17,14,22,2,11,
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23,13,24,4,16,12,25,30);
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b2 = rom[2*(i+j)] + (rom[2*(i+j)+1] << 8);
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27,6,15,21,1,28,10,20,
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7,31,26,0,18,9,19,8);
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d12 = dec12(b2);
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d3 = dec3((b1 >> 0) & 0xff);
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d4 = dec4((b1 >> 8) & 0xff);
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d5 = dec5((b1 >> 16) & 0xff);
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d6 = dec6((b1 >> 24) & 0xff);
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plane54 = partial_carry_sum16( plane54, 0xabcb, 0x55aa ) ^ 0x6699;
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plane3210 = partial_carry_sum32( plane3210, 0x654321d9 ^ 0x42, 0x1d463748 ) ^ 0x0ca352a9;
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rom[2*(i+j)] = d12 >> 8;
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rom[2*(i+j)+1] = d12;
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rom[2*(s+i+j)] = d3;
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rom[2*(s+i+j)+1] = d4;
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rom[2*((s*2)+i+j)] = d5;
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rom[2*((s*2)+i+j)+1] = d6;
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rom[0*size+2*i] = plane54 >> 8;
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rom[0*size+2*i+1] = plane54 >> 0;
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rom[1*size+2*i] = plane3210 >> 24;
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rom[1*size+2*i+1] = plane3210 >> 16;
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rom[2*size+2*i] = plane3210 >> 8;
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rom[2*size+2*i+1] = plane3210 >> 0;
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}
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for (i = 0; i < size/2; i += 32)
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{
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sprite_reorder(&rom[0*size+2*i]);
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sprite_reorder(&rom[1*size+2*i]);
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sprite_reorder(&rom[2*size+2*i]);
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}
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}
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@ -265,61 +259,43 @@ void seibuspi_rise10_sprite_decrypt(UINT8 *rom, int size)
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/******************************************************************************************
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rf2_eur (we don't have the gfx ROMs for this one)
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 00000000 & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 0000ABCB & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 0000ABCB & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 00006543 & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 000021D9 & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 00006655 & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 000099AA & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 00006655 & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 000099AA & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 00000C1D & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 0000A346 & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 00005237 & 0000FFFF
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cpu #0 (PC=002A097D): unmapped program memory dword write to 0000054C = 0000A948 & 0000FFFF
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plane543 = partial_carry_sum24( plane543, 0x??????, 0x??2199 ) ^ 0x??d9aa;
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plane210 = partial_carry_sum24( plane210, i, 0x990c52 ) ^ 0xaa1d37;
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rfjet
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00000000 & 0000FFFF
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00000000 & 0000FFFF
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 000055AB & 0000FFFF
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 000055AB & 0000FFFF // okok
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00000000 & 0000FFFF
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000AA6A & 0000FFFF //
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000ABCB & 0000FFFF
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000DD4C & 0000FFFF //
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00006543 & 0000FFFF
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000D68B & 0000FFFF //
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 000037F2 & 0000FFFF //
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 000021D9 & 0000FFFF
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00005B3B & 0000FFFF //
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000AA6A & 0000FFFF // okok
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000ABCB & 0000FFFF // okok
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000DD4C & 0000FFFF // okok
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00006543 & 0000FFFF // no??
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 0000D68B & 0000FFFF // okok
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 000037F2 & 0000FFFF // okok
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 000021D9 & 0000FFFF // ????
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00005B3B & 0000FFFF // okok
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cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00000300 & 0000FFFF
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plane543 = partial_carry_sum24( plane543, 0x01cb64, 0x01aadd ) ^ 0x016a4c;
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plane543 = partial_carry_sum32( plane543, 0xabcb64, 0x55aadd ) ^ 0xab6a4c;
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plane210 = partial_carry_sum24( plane210, i, 0xd6375b ) ^ 0x8bf23b;
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feversoc
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = D5A90000 & FFFF0000
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 4EB50000 & FFFF0000
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 9A4A0000 & FFFF0000
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 9A4A0000 & FFFF0000 // okok
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = ADB30000 & FFFF0000
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = E9320000 & FFFF0000 //
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 9DF50000 & FFFF0000
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 99E90000 & FFFF0000 //
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = B2590000 & FFFF0000
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 961D0000 & FFFF0000 //
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 8B970000 & FFFF0000 //
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = EAAE0000 & FFFF0000
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = D5AC0000 & FFFF0000 //
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = E9320000 & FFFF0000 // okok
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 9DF50000 & FFFF0000 // okok
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 99E90000 & FFFF0000 // okok
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = B2590000 & FFFF0000 // ok??
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 961D0000 & FFFF0000 // okok
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 8B970000 & FFFF0000 // okok
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = EAAE0000 & FFFF0000 // ????
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = D5AC0000 & FFFF0000 // okok
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CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 03000000 & FFFF0000
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plane543 = partial_carry_sum24( plane543, 0x18f5b2, 0x18e999 ) ^ 0xcf32e9;
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plane543 = partial_carry_sum32( plane543, 0x9df5b2, 0x9ae999 ) ^ 0x4a32e9;
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plane210 = partial_carry_sum24( plane210, i, 0x968bd5 ) ^ 0x1d97ac;
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plane210 = partial_carry_sum24( plane210, 1, 0x000001 );
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@ -333,8 +309,8 @@ void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int size,
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for (i = 0; i < size/2; i++)
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{
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int b1,b2,b3;
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int plane543,plane210;
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UINT16 b1,b2,b3;
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UINT32 plane543,plane210;
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b1 = rom[0*size+2*i] + (rom[0*size+2*i+1] << 8);
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b2 = rom[1*size+2*i] + (rom[1*size+2*i+1] << 8);
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@ -390,7 +366,7 @@ void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int size,
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(BIT(b1, 5)<<22) |
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(BIT(b3,15)<<23);
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plane543 = partial_carry_sum24( plane543, k1, k2 ) ^ k3;
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plane543 = partial_carry_sum32( plane543, k1, k2 ) ^ k3;
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plane210 = partial_carry_sum24( plane210, i, k4 ) ^ k5;
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if (feversoc_kludge)
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plane210 = partial_carry_sum24( plane210, 1, 0x000001 );
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@ -414,11 +390,11 @@ void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int size,
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void seibuspi_rise11_sprite_decrypt_rfjet(UINT8 *rom, int size)
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{
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seibuspi_rise11_sprite_decrypt(rom, size, 0x01cb64, 0x01aadd, 0x016a4c, 0xd6375b, 0x8bf23b, 0);
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seibuspi_rise11_sprite_decrypt(rom, size, 0xabcb64, 0x55aadd, 0xab6a4c, 0xd6375b, 0x8bf23b, 0);
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}
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void seibuspi_rise11_sprite_decrypt_feversoc(UINT8 *rom, int size)
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{
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seibuspi_rise11_sprite_decrypt(rom, size, 0x18f5b2, 0x18e999, 0xcf32e9, 0x968bd5, 0x1d97ac, 1);
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seibuspi_rise11_sprite_decrypt(rom, size, 0x9df5b2, 0x9ae999, 0x4a32e9, 0x968bd5, 0x1d97ac, 1);
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}
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