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ToP interleaved loading requirements reduced by 2MB, code cleanup.

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This commit is contained in:
n-a-c-h
2003-07-10 19:06:36 +00:00
parent 91d11de3ed
commit 5dbb414d24
1 changed files with 308 additions and 318 deletions
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40
zsnes/src/initc.c
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@@ -32,7 +32,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//better versions from NSRT. -Nach //better versions from NSRT. -Nach
//init.asm goodnes //init.asm goodness
extern unsigned int NumofBanks; extern unsigned int NumofBanks;
extern unsigned int NumofBytes; extern unsigned int NumofBytes;
extern unsigned int *romdata; extern unsigned int *romdata;
@@ -86,8 +86,8 @@ void swapBlocks(char *blocks)
void deintlv1() void deintlv1()
{ {
int i, numblocks = NumofBanks/2;
char blocks[256]; char blocks[256];
int i, numblocks = NumofBanks/2;
for (i = 0; i < numblocks; i++) for (i = 0; i < numblocks; i++)
{ {
blocks[i * 2] = i + numblocks; blocks[i * 2] = i + numblocks;
@@ -121,22 +121,15 @@ void CheckIntl1(unsigned char *ROM)
} }
} }
//It would be nice to find a way to eliminate the 2MB here
//Then we can also drop the includes of these two
#include <string.h>
#include <malloc.h>
void deintToP() void deintToP()
{ {
int i; //Swap 2MB and 4MB ROMs
char blocks[256]; unsigned int temp, i, *loc1 = romdata, *loc2 = romdata + 0x80000;
char *ROM = (char *)romdata; for (i = 0; i < 0x100000; i++)
char *ROMSwap = (char *)malloc(0x200000);
if (ROMSwap)
{ {
memmove(ROMSwap, ROM, 0x200000); //Copy Small ROM to RAM temp = loc1[i];
memmove(ROM, &ROM[0x200000], 0x400000); //Move Large ROM to front loc1[i] = loc2[i];
memmove(&ROM[0x400000], ROMSwap, 0x200000); //Place Small ROM after loc2[i] = temp;
free(ROMSwap);
} }
//Deinterleave the 4MB ROM first //Deinterleave the 4MB ROM first
@@ -171,12 +164,12 @@ bool AllASCII(char *b, int size)
int InfoScore(char *Buffer) int InfoScore(char *Buffer)
{ {
int score = 0; int score = 0;
if (Buffer[26] == 0x33) { score += 2; } if (Buffer[26] == 0x33) { score += 2; }
if ((Buffer[21] & 0xf) < 4) { score += 2; } if ((Buffer[21] & 0xf) < 4) { score += 2; }
if (!(Buffer[61] & 0x80)) { score -= 4; } if (!(Buffer[61] & 0x80)) { score -= 4; }
if ((1 << (Buffer[23] - 7)) > 48) { score -= 1; } if ((1 << (Buffer[23] - 7)) > 48) { score -= 1; }
if (Buffer[25] < 14) { score += 1; } if (Buffer[25] < 14) { score += 1; }
if (!AllASCII(Buffer, 20)) { score -= 1; } if (!AllASCII(Buffer, 20)) { score -= 1; }
return(score); return(score);
} }
@@ -249,7 +242,6 @@ void BankCheck()
infoloc = Lo; infoloc = Lo;
} }
} }
} }
@@ -284,9 +276,7 @@ void CalcChecksum()
{ {
unsigned char *ROM = (unsigned char *)romdata; unsigned char *ROM = (unsigned char *)romdata;
unsigned short Mbit = NumofBanks >> 2, Checksum; unsigned short Mbit = NumofBanks >> 2, Checksum;
unsigned int ROMSize = NumofBytes; unsigned int ROMSize = NumofBytes, Bank = infoloc;
unsigned int Bank = infoloc;
if ((Mbit == 10 || Mbit == 20 || Mbit == 40) && !SPC7110Enable) if ((Mbit == 10 || Mbit == 20 || Mbit == 40) && !SPC7110Enable)
{ {