+//
+// CD Interface handler
+//
+// by cal2
+// GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
+// Cleanups by James L. Hammons
+//
+
#include "cdi.h"
/* Added by SDLEMU (http://sdlemu.ngemu.com) */
/* Added for GCC UNIX compatibility */
#ifdef __GCCUNIX__
- #include <unistd.h>
- #include <sys/types.h>
- #include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <fcntl.h>
- #define O_BINARY (0)
+#define O_BINARY (0)
#endif
#define CDI_V2 0x80000004
#define CDI_V3 0x80000005
#define CDI_V35 0x80000006
-static uint8 cdi_track_start_mark[10] = { 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF };
-
-
+static uint8 cdi_track_start_mark[10] =
+ { 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF };
int cdi_fp;
uint32 cdi_load_address;
uint32 cdi_code_length;
-s_cdi_descriptor *cdi_descriptor;
-s_cdi_track **cdi_tracks;
-uint32 cdi_tracks_count;
+s_cdi_descriptor * cdi_descriptor;
+s_cdi_track ** cdi_tracks;
+uint32 cdi_tracks_count;
-//////////////////////////////////////////////////////////////////////////////
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-//
-//
-//
-//
-//
-//////////////////////////////////////////////////////////////////////////////
-int cdi_open(char *path)
+int cdi_open(char * path)
{
- fprintf(log_get(),"cdi: opening %s\n",path);
- return(open(path,O_BINARY|O_RDONLY));
+ fprintf(log_get(), "CDI: Opening %s\n", path);
+ return open(path, O_BINARY | O_RDONLY);
}
-//////////////////////////////////////////////////////////////////////////////
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-//
-//
-//
-//
-//
-//////////////////////////////////////////////////////////////////////////////
+
void cdi_close(int fp)
{
- fprintf(log_get(),"cdi: closing\n");
+ fprintf(log_get(), "CDI: Closing\n");
close(fp);
}
-//////////////////////////////////////////////////////////////////////////////
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-//
-//
-//
-//
-//
-//////////////////////////////////////////////////////////////////////////////
+
#ifdef __PORT__
long tell(int fd)
{
return lseek(fd, 0LL, SEEK_CUR);
}
#endif
+
s_cdi_descriptor *cdi_get_descriptor(int fp, FILE *stdfp)
{
s_cdi_descriptor *descriptor;
return(descriptor);
}
-//////////////////////////////////////////////////////////////////////////////
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-//
-//
-//
-//
-//
-//////////////////////////////////////////////////////////////////////////////
+
void cdi_dump_descriptor(FILE *fp,s_cdi_descriptor *cdi_descriptor)
{
fprintf(fp,"cdi: %i Mb\n",cdi_descriptor->length>>20);
}
fprintf(fp,"cdi: %i sessions\n",cdi_descriptor->nb_of_sessions);
}
-//////////////////////////////////////////////////////////////////////////////
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-//
-//
-//
-//
-//
-//////////////////////////////////////////////////////////////////////////////
-uint8 *cdi_extract_boot_code(int fp, s_cdi_descriptor *cdi_descriptor)
+
+uint8 * cdi_extract_boot_code(int fp, s_cdi_descriptor * cdi_descriptor)
{
- s_cdi_track *boot_track=&cdi_descriptor->sessions[1].tracks[0];
- uint32 boot_track_size=boot_track->length*boot_track->sector_size;
+ s_cdi_track * boot_track = &cdi_descriptor->sessions[1].tracks[0];
+ uint32 boot_track_size = boot_track->length * boot_track->sector_size;
- uint8 *boot_track_data=(uint8*)malloc(boot_track_size);
- lseek(fp,2+(boot_track->position), SEEK_SET);
- read(fp,boot_track_data,boot_track_size);
+ uint8 * boot_track_data = (uint8 *)malloc(boot_track_size);
+ lseek(fp, 2 + (boot_track->position), SEEK_SET);
+ read(fp, boot_track_data, boot_track_size);
- uint32 *boot_track_data_32=(uint32*)boot_track_data;
- uint32 offset=0;
- while (offset<(boot_track_size>>2))
+ uint32 * boot_track_data_32 = (uint32 *)boot_track_data;
+ uint32 offset = 0;
+ while (offset < (boot_track_size >> 2))
{
- if (boot_track_data_32[offset]==0x49205452)
+ if (boot_track_data_32[offset] == 0x49205452)
break;
offset++;
}
- if (offset==(boot_track_size>>2))
+ if (offset == (boot_track_size >> 2))
{
- fprintf(log_get(),"cdi: cannot find the boot code\n");
- return(NULL);
+ fprintf(log_get(), "CDI: Cannot find the boot code\n");
+ return NULL;
}
- offset=(offset<<2)+4;
- uint16 *data16=(uint16*)&boot_track_data[offset];
- cdi_load_address=*data16++; cdi_load_address<<=16; cdi_load_address|=*data16++;
- cdi_code_length=*data16++; cdi_code_length<<=16; cdi_code_length|=*data16++;
- fprintf(log_get(),"cdi: load address: 0x%.8x\n",cdi_load_address);
- fprintf(log_get(),"cdi: length: 0x%.8x\n",cdi_code_length);
- fprintf(log_get(),"cdi: byte swapping boot code\n");
-
- for (uint32 i=0;i<(cdi_code_length>>1);i++)
+
+ offset = (offset << 2) + 4;
+ uint16 * data16 = (uint16 *)&boot_track_data[offset];
+ cdi_load_address = *data16++;
+ cdi_load_address <<= 16;
+ cdi_load_address |= *data16++;
+ cdi_code_length = *data16++;
+ cdi_code_length <<= 16;
+ cdi_code_length |= *data16++;
+ fprintf(log_get(), "CDI: Load address: %08X\n", cdi_load_address);
+ fprintf(log_get(), "CDI: Length: %08X\n", cdi_code_length);
+//No need for byte swapping any more...
+/* fprintf(log_get(), "cdi: byte swapping boot code\n");
+
+ for(uint32 i=0; i<(cdi_code_length >> 1); i++)
{
- uint16 sdata=data16[i];
- sdata=(sdata>>8)|(sdata<<8);
- data16[i]=sdata;
- }
- return((uint8*)data16);
+ uint16 sdata = data16[i];
+ sdata = (sdata >> 8) | (sdata << 8);
+ data16[i] = sdata;
+ }*/
+
+ return (uint8 *)data16;
}
-//////////////////////////////////////////////////////////////////////////////
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-//
-//
-//
-//
-//
-//////////////////////////////////////////////////////////////////////////////
-void cdi_load_sector(uint32 sector, uint8 *buffer)
+
+void cdi_load_sector(uint32 sector, uint8 * buffer)
{
- if (sector==0xffffffff)
+ if (sector == 0xFFFFFFFF)
{
- memset(buffer,0x00,2352);
+ memset(buffer, 0x00, 2352);
return;
}
- sector*=2352;
+ sector *= 2352;
- lseek(cdi_fp,2+sector,SEEK_SET);
- read(cdi_fp,buffer,2352);
+ lseek(cdi_fp, 2+sector, SEEK_SET);
+ read(cdi_fp, buffer, 2352);
- // byte swap
+//This is probably not needed any more...
+/* // byte swap
for (uint32 i=0;i<2352;i+=2)
{
uint8 sdata=buffer[i+0];
buffer[i+0]=buffer[i+1];
buffer[i+1]=sdata;
- }
-
+ }*/
}
projects / virtualjaguar / blobdiff