/
7800header.c
1717 lines (1605 loc) · 43.9 KB
/
7800header.c
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// Provided under the GPL v2 license. See the included LICENSE.txt for details.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <stdint.h>
#include <stdarg.h>
#include <ctype.h>
// 7800header - a simple app to generate/interrogate a a78 header.
// Michael Saarna (aka RevEng@AtariAge)
#define HEADER_VERSION_INFO "7800header 0.21"
void usage (char *binaryname);
uint32_t phtole32 (uint32_t value);
void loadfile (char *filename);
void report (void);
void setupheaderdefaults (void);
void setunset (char *command);
int checkset (char *option, int typemask);
void clearbasemappers (void);
void syncheader (void);
void writea78 (char *filename);
void writebin (char *filename);
void prerror (char *format, ...);
void prwarn (char *format, ...);
void trimnewline (char *string);
struct header7800
{
unsigned char version; //0
char console[16]; //1-16
char gamename[32]; //17-48
unsigned char romsize1; //49
unsigned char romsize2; //50
unsigned char romsize3; //51
unsigned char romsize4; //52
// deprecated bytes in v4...
unsigned char carttype1; //53
unsigned char carttype2; //54
unsigned char controller1; //55
unsigned char controller2; //56
unsigned char tvformat; //57
unsigned char saveperipheral; //58
unsigned char unused1[3]; //59-61
// deprecated bytes in v4...
unsigned char irq; //62
unsigned char xm; //63
// v4 cart hardware bytes
unsigned char mapper; //64
unsigned char mapper_options; //65
unsigned char audio1; //66
unsigned char audio2; //67
unsigned char interrupt1; //68
unsigned char interrupt2; //69
unsigned char unused2[30]; //70-99
char headertext[28]; //100-127
} myheader;
long gamesize;
uint32_t headergamesize;
char *rombuffer;
int v3only = 0;
int v4only = 0;
int overwrite = 0;
int printinfo = 0;
char filename[1024];
int main (int argc, char **argv)
{
FILE *in;
char usercommand[1024];
int c;
opterr = 0;
fprintf (stderr, "\n%s %s %s\n", HEADER_VERSION_INFO, __DATE__, __TIME__);
assert (sizeof (myheader) == 128);
if ((argc < 2) || (argv[argc - 1][0] == '-'))
usage (argv[0]);
strncpy (filename, argv[argc - 1], 1024);
in = fopen (filename, "rb");
if (in == NULL)
prerror ("Couldn't open '%s' for reading.\n", filename);
//open the file and get the size...
fseek (in, 0, SEEK_END);
gamesize = ftell (in);
fseek (in, 0, SEEK_SET); //rewind
if (gamesize == 0)
prerror ("The file size of %s is 0 bytes.\n", filename);
if (gamesize > 128)
fread (&myheader, 1, 128, in);
if (strncmp (myheader.console, "ATARI7800", 9) == 0)
gamesize = gamesize - 128;
else
{
fseek (in, 0, SEEK_SET); //rewind
setupheaderdefaults ();
}
if ((gamesize & 0x0FFF) != 0)
prwarn ("The file size of %s isn't correct.\n", filename);
rombuffer = malloc (gamesize);
if (rombuffer == NULL)
prerror ("Couldn't allocate %d bytes to hold rom\n", gamesize);
fread (rombuffer, 128, (gamesize / 128), in);
// get options - mainly used for reading in header configuration setup from a file
while ((c = getopt (argc, argv, "f:34opb")) != -1)
{
switch (c)
{
case 'f': // load options from configuration file
loadfile (optarg);
writea78 (filename);
exit (0);
break;
case '3': // v3 header only
if (v4only)
prerror ("both v3-only and v4-only headers selected.");
v3only = 1;
break;
case '4': // v4 header only
if (v3only)
prerror ("both v3-only and v4-only headers selected.");
v4only = 1;
break;
case 'o': // overwrite existing A78 file
overwrite = 1;
break;
case 'p': // print header info and exit
printinfo = 1;
break;
case 'b': // write out a bin file
writebin (filename);
exit (0);
break;
}
}
//fix bits that shouldn't be set in the header
if (!printinfo)
{
if (myheader.controller1 > 12)
myheader.controller1 = 1;
if (myheader.controller2 > 12)
myheader.controller2 = 1;
if (myheader.version < 3)
myheader.tvformat &= 1;
myheader.saveperipheral &= 3;
myheader.xm &= 1;
if (v3only)
myheader.version = 3;
else
{
myheader.version = 4;
if (myheader.mapper == 0xff)
{
// If the v4 header bytes are 0xff, clear them out. The dasm default fill is 0xff.
myheader.mapper = 0;
myheader.mapper_options = 0;
myheader.audio1 = 0;
myheader.audio2 = 0;
myheader.interrupt1 = 0;
myheader.interrupt2 = 0;
}
}
if ((!v4only) && (myheader.carttype1 == 0xff) && (myheader.carttype2 == 0xff))
{
// if we're not running v4 only, clear out a detected v3 scuttle
myheader.carttype1 = 0;
myheader.carttype2 = 0;
}
}
for (;;) //loop infinitely through the report until the user explicitly exits
{
#ifdef _WIN32
if (printinfo == 0)
system ("cls");
#else
if (printinfo == 0)
system ("clear");
#endif
report ();
if (printinfo)
exit (0);
printf ("Commands: \"(un)set [option]\" - Add/Remove options.\n");
printf (" \"name [embedded name]\" - Set the game name in the header.\n");
if ((v3only) || (v4only))
printf (" \"fix\" - Fix embedded size.\n");
else
printf (" \"fix\" - Fix embedded size and sync v3+v4.\n");
printf (" \"save [name]\" - Save a78 and exit.\n");
printf (" \"strip [name]\" - Save headerless bin file and exit.\n");
printf (" \"exit\" - Exit the utility without saving.\n");
printf ("\n");
printf ("Options: linear supergame souper bankset absolute activision\n");
printf (" rom@4000 bank6@4000 ram@4000 mram@4000 hram@4000 bankram pokey@440 pokey@450\n");
printf (" pokey@800 pokey@4000 ym2151@460 covox@430 adpcm@420 irqpokey1/2 irqym2151\n");
printf (" 7800joy1/2 lightgun1/2 paddle1/2 tball1/2 7800joy1/2 lightgun1/2 paddle1/2\n");
printf (" tball1/2 2600joy1/2 driving1/2 keypad1/2 stmouse1/2 amouse1/2 snes1/2\n");
printf (" mega78001/2 hsc savekey xm tvpal tvntsc composite mregion\n");
printf ("> ");
if (fgets (usercommand, 1024, stdin))
{
trimnewline (usercommand);
if (strncmp (usercommand, "save", 4) == 0)
{
if ((usercommand[4] == ' ') && (usercommand[5] != 0))
writea78 (usercommand + 5);
else
writea78 (filename);
exit (0);
}
if (strncmp (usercommand, "strip", 5) == 0)
{
if ((usercommand[5] == ' ') && (usercommand[6] != 0))
writebin (usercommand + 6);
else
writebin (filename);
exit (0);
}
if (strncmp (usercommand, "fix", 7) == 0)
{
// recalculate the size...
myheader.romsize4 = (gamesize >> 0) & 0xff;
myheader.romsize3 = (gamesize >> 8) & 0xff;
myheader.romsize2 = (gamesize >> 16) & 0xff;
myheader.romsize1 = (gamesize >> 24) & 0xff;
headergamesize = gamesize;
// sync the headers...
syncheader ();
}
else if (strncmp (usercommand, "name ", 5) == 0)
{
memset (myheader.gamename, 0, 32);
strncpy (myheader.gamename, usercommand + 5, 32);
}
else if ((strncmp (usercommand, "ex", 2) == 0) || (usercommand[0] == 'x') || (usercommand[0] == 'q'))
{
exit (0);
}
else
{
setunset (usercommand);
}
}
}
}
char *strrstr (char *haystack, char *needle)
{
if ((haystack == NULL) || (needle == NULL))
return (NULL);
char *last = haystack;
while (*last != 0)
last++;
last--;
while (last > haystack)
{
if (strncasecmp (last, needle, strlen (needle)) == 0)
return (last);
last--;
}
return (NULL);
}
void trimnewline (char *string)
{
if (string == NULL)
return;
while (*string != 0)
{
if ((*string == '\r') || (*string == '\n'))
{
*string = 0;
return;
}
string++;
}
return;
}
void writea78 (char *filename)
{
char newname[1024];
char *ext;
ext = strrstr (filename, ".bin");
if (ext != NULL)
{
strcpy (ext, ".a78");
}
FILE *in, *out;
if (overwrite == 0)
{
in = fopen (filename, "r");
if (in != NULL)
{
fclose (in);
//the destination file exists. rename it to back it up.
strcpy (newname, filename);
strcat (newname, ".backup");
rename (filename, newname);
}
}
out = fopen (filename, "wb");
if (out == NULL)
prerror ("error opening file '%s' for writing.", filename);
if (fwrite (&myheader, 1, 128, out) != 128)
prerror ("error while writing a78 header out.\n");
if (fwrite (rombuffer, 128, (gamesize / 128), out) != (gamesize / 128))
prerror ("error while writing a78 file out.\n");
fclose (out);
}
void writebin (char *filename)
{
char newname[1024];
char *ext;
ext = strrstr (filename, ".a78");
if (ext != NULL)
{
strcpy (ext, ".bin");
}
FILE *in, *out;
if (overwrite == 0)
{
in = fopen (filename, "r");
if (in != NULL)
{
fclose (in);
//the destination file exists. rename it to back it up.
strcpy (newname, filename);
strcat (newname, ".backup");
rename (filename, newname);
}
}
out = fopen (filename, "wb");
if (out == NULL)
prerror ("error opening file '%s' for writing.", filename);
if (fwrite (rombuffer, 128, (gamesize / 128), out) != (gamesize / 128))
prerror ("error while writing bin file out.\n");
fclose (out);
}
void setupheaderdefaults ()
{
headergamesize = phtole32 (gamesize);
// a78 header format version...
if (v3only)
myheader.version = 3;
else
myheader.version = 4;
strncpy (myheader.console, "ATARI7800 ", 16);
strncpy (myheader.gamename, "My Game ", 32);
myheader.romsize1 = (headergamesize >> 24) & 0xff;
myheader.romsize2 = (headergamesize >> 16) & 0xff;
myheader.romsize3 = (headergamesize >> 8) & 0xff;
myheader.romsize4 = (headergamesize >> 0) & 0xff;
// bit 0 = pokey at $4000
// bit 1 = supergame bank switched
// bit 2 = supergame ram at $4000
// bit 3 = rom at $4000
// bit 4 = bank 6 at $4000
// bit 5 = supergame banked ram
// bit 6 = pokey at $450
// bit 7 = mirror ram at $4000
// bit 8 = activision banking
// bit 9 = absolute banking
// bit 10 = pokey at $440
// bit 11 = ym2151 at $440/$441
// bit 12 = souper
// bit 12-15 = special
if (!v4only)
{
myheader.carttype1 = 0;
myheader.carttype2 = 0;
myheader.irq = 0;
}
else // it's v4 only, so we need to scuttle the v3 fields
{
myheader.carttype1 = 0xff;
myheader.carttype2 = 0xff;
}
// controller 0=none, 1=7800joy, 2=lightgun, ...
myheader.controller1 = 1;
myheader.controller2 = 1;
// tv format 0=NTSC 1=PAL
myheader.tvformat = 0;
// save peripheral 0=none, 1=hsc, 2=savekey/avox
myheader.saveperipheral = 0;
memset (myheader.unused1, 0, 4);
myheader.xm = 0;
myheader.mapper = 0;
myheader.mapper_options = 0;
myheader.audio1 = 0;
myheader.audio2 = 0;
myheader.interrupt1 = 0;
myheader.interrupt2 = 0;
memset (myheader.unused2, 0, 30);
// some expected static text...
strncpy (myheader.headertext, "ACTUAL CART DATA STARTS HERE", 28);
}
void setunset (char *command)
{
char verb[1024], noun[1024];
int set, unset;
int t, s;
set = 0;
unset = 0;
if (command == NULL)
return;
while (*command == ' ') // suck up any leading spaces, just in case
command++;
for (t = 0; command[t] != 0; t++)
if ((command[t] == '\n') || (command[t] == '\r'))
command[t] = 0;
s = 0;
for (t = 0; command[t] != 0; t++)
{
if (command[t] == ' ')
{
verb[s] = 0;
t = t + 1;
break;
}
verb[s] = tolower (command[t]);
s = s + 1;
}
if (command[t] == 0)
return;
s = 0;
for (; command[t] != 0; t++)
{
if ((command[t] == ' ') || (command[t] == '#'))
{
char *rcommand = malloc(1026);
if(rcommand==NULL)
prerror ("Memory allocation error\n");
snprintf(rcommand,1026,"%s %s",verb,command+t+1);
setunset(rcommand);
free(rcommand);
noun[s] = 0;
t = t + 1;
break;
}
noun[s] = tolower (command[t]);
s = s + 1;
}
noun[s] = 0;
if (strcmp (verb, "set") == 0)
set = 1;
if (strcmp (verb, "unset") == 0)
unset = 1;
if ((set == 0) && (unset == 0))
return; //we only handle setting and unsetting flags here
// ***** BASE MAPPER...
if (strcmp (noun, "linear") == 0)
clearbasemappers ();
if (strcmp (noun, "supergame") == 0)
{
if (set)
{
clearbasemappers ();
if (!v4only)
myheader.carttype2 = myheader.carttype2 | 2;
if (!v3only)
myheader.mapper = 1;
}
else
{
if ((!v4only) && (checkset ("supergame", 3)))
myheader.carttype2 = myheader.carttype2 & (2 ^ 0xff);
if ((!v3only) && (checkset ("supergame", 4)))
myheader.mapper = 0;
}
}
else if (strcmp (noun, "activision") == 0)
{
if (set)
{
clearbasemappers ();
setunset ("unset bankset");
if (!v4only)
myheader.carttype1 = myheader.carttype1 | 1;
if (!v3only)
{
myheader.mapper = 2;
myheader.mapper_options = 0;
}
}
else
{
if ((!v4only) && (checkset ("activision", 3)))
myheader.carttype1 = myheader.carttype1 & (1 ^ 0xff);
if ((!v3only) && (checkset ("activision", 4)))
myheader.mapper = 0;
}
}
else if (strcmp (noun, "absolute") == 0)
{
if (set)
{
clearbasemappers ();
setunset ("unset bankset");
if (!v4only)
myheader.carttype1 = myheader.carttype1 | 2;
if (!v3only)
{
myheader.mapper = 3;
myheader.mapper_options = 0;
}
}
else
{
if ((!v4only) && (checkset ("absolute", 3)))
myheader.carttype1 = myheader.carttype1 & (2 ^ 0xff);
if ((!v3only) && (checkset ("absolute", 4)))
myheader.mapper = 0;
}
}
else if (strcmp (noun, "souper") == 0)
{
if (set)
{
clearbasemappers ();
setunset ("unset bankset");
if (!v4only)
myheader.carttype1 = myheader.carttype1 | 16;
if (!v3only)
{
myheader.mapper = 4;
myheader.mapper_options = 0;
}
}
else
{
if ((!v4only) && (checkset ("souper", 3)))
myheader.carttype1 = myheader.carttype1 & (16 ^ 0xff);
if ((!v3only) && (checkset ("souper", 4)))
myheader.mapper = 0;
}
}
else if (strcmp (noun, "bankset") == 0)
{
if (set)
{
setunset ("unset activision");
setunset ("unset absolute");
setunset ("unset souper");
if (!v4only)
myheader.carttype1 = myheader.carttype1 | 32;
if (!v3only)
myheader.mapper_options = myheader.mapper_options | 0x80;
}
else
{
if ((!v4only) && (checkset ("bankset", 3)))
myheader.carttype1 = myheader.carttype1 & (32 ^ 0xff);
if ((!v3only) && (checkset ("bankset", 4)))
myheader.mapper_options = myheader.mapper_options & 0x7F;
}
}
// ***** CART RAM...
else if ((strcmp (noun, "supergameram") == 0) || (strcmp (noun, "ram@4000") == 0))
{
if (set)
{
if (!v4only)
myheader.carttype2 = myheader.carttype2 | 4;
if (!v3only)
myheader.mapper_options = (myheader.mapper_options & 0xF8) | 1;
}
else
{
if ((!v4only) && (checkset ("ram@4000", 3)))
myheader.carttype2 = myheader.carttype2 & (4 ^ 0xff);
if ((!v3only) && (checkset ("ram@4000", 4)))
myheader.mapper_options = (myheader.mapper_options & 0xF8);
}
}
else if (strcmp (noun, "bankram") == 0)
{
if (set)
{
if (!v4only)
myheader.carttype2 = myheader.carttype2 | 32;
if (!v3only)
myheader.mapper_options = (myheader.mapper_options & 0xF8) | 6;
}
else
{
if ((!v4only) && (checkset ("bankram", 3)))
myheader.carttype2 = myheader.carttype2 & (32 ^ 0xff);
if ((!v3only) && (checkset ("bankram", 4)))
myheader.mapper_options = (myheader.mapper_options & 0xF8);
}
}
else if (strcmp (noun, "mram@4000") == 0)
{
if (set)
{
if (!v4only)
myheader.carttype2 = myheader.carttype2 | 128;
if (!v3only)
myheader.mapper_options = (myheader.mapper_options & 0xF8) | 2;
}
else
{
if ((!v4only) && (checkset ("mram@4000", 3)))
myheader.carttype2 = myheader.carttype2 & (128 ^ 0xff);
if ((!v3only) && (checkset ("mram@4000", 4)))
myheader.mapper_options = (myheader.mapper_options & 0xF8);
}
}
else if (strcmp (noun, "hram@4000") == 0)
{
if (set)
{
if (!v4only)
myheader.carttype1 = myheader.carttype1 | 64;
if (!v3only)
myheader.mapper_options = (myheader.mapper_options & 0xF8) | 3;
}
else
{
if ((!v4only) && (checkset ("hram@4000", 3)))
myheader.carttype1 = myheader.carttype1 & (64 ^ 0xff);
if ((!v3only) && (checkset ("hram@4000", 4)))
myheader.mapper_options = (myheader.mapper_options & 0xF8);
}
}
// ***** EXTRA ROM...
else if (strcmp (noun, "rom@4000") == 0)
{
if (set)
{
if (!v4only)
myheader.carttype2 = myheader.carttype2 | 8;
if (!v3only)
myheader.mapper_options = (myheader.mapper_options & 0xF8) | 4;
}
else
{
if ((!v4only) && (checkset ("rom@4000", 3)))
myheader.carttype2 = myheader.carttype2 & (8 ^ 0xff);
if ((!v3only) && (checkset ("rom@4000", 4)))
myheader.mapper_options = (myheader.mapper_options & 0xF8);
}
}
else if (strcmp (noun, "bank6@4000") == 0)
{
if (set)
{
if (!v4only)
myheader.carttype2 = myheader.carttype2 | 16;
if (!v3only)
myheader.mapper_options = (myheader.mapper_options & 0xF8) | 5;
}
else
{
if ((!v4only) && (checkset ("bank6@4000", 3)))
myheader.carttype2 = myheader.carttype2 & (16 ^ 0xff);
if ((!v3only) && (checkset ("bank6@4000", 4)))
myheader.mapper_options = (myheader.mapper_options & 0xF8);
}
}
// ***** AUDIO...
else if (strcmp (noun, "pokey@4000") == 0)
{
if (set)
{
if (!v4only)
{
myheader.carttype2 = myheader.carttype2 | 1;
//unset other pokeys...
myheader.carttype2 = myheader.carttype2 & (64 ^ 0xff); // 450
myheader.carttype1 = myheader.carttype1 & (4 ^ 0xff); // 440
myheader.carttype1 = myheader.carttype1 & (128 ^ 0xff); // 800
}
if (!v3only)
myheader.audio2 = (myheader.audio2 & 0xF8) | 5;
}
else
{
if ((!v4only) && (checkset ("pokey@4000", 3)))
myheader.carttype2 = myheader.carttype2 & (1 ^ 0xff);
if ((!v3only) && (checkset ("pokey@4000", 4)))
myheader.audio2 = (myheader.audio2 & 0xF8);
}
}
else if (strcmp (noun, "pokey@450") == 0)
{
if (set)
{
if (!v4only)
{
myheader.carttype2 = myheader.carttype2 | 64;
//unset other pokeys...
myheader.carttype2 = myheader.carttype2 & (1 ^ 0xff); // 4000
myheader.carttype1 = myheader.carttype1 & (128 ^ 0xff); // 800
}
if (!v3only)
{
if (checkset ("pokey@440", 4))
myheader.audio2 = (myheader.audio2 & 0xF8) | 3;
else
myheader.audio2 = (myheader.audio2 & 0xF8) | 2;
}
}
else
{
if ((!v4only) && (checkset ("pokey@450", 3)))
myheader.carttype2 = myheader.carttype2 & (64 ^ 0xff);
if ((!v3only) && (checkset ("pokey@450", 4)))
{
if (checkset ("pokey@440", 4))
myheader.audio2 = (myheader.audio2 & 0xF8) | 1;
else
myheader.audio2 = (myheader.audio2 & 0xF8);
}
}
}
else if (strcmp (noun, "pokey@440") == 0)
{
if (set)
{
if (!v4only)
{
myheader.carttype1 = myheader.carttype1 | 4;
//unset other pokeys...
myheader.carttype2 = myheader.carttype2 & (1 ^ 0xff); // 4000
myheader.carttype1 = myheader.carttype1 & (128 ^ 0xff); // 800
}
if (!v3only)
{
if (checkset ("pokey@450", 4))
myheader.audio2 = (myheader.audio2 & 0xF8) | 3;
else
myheader.audio2 = (myheader.audio2 & 0xF8) | 1;
}
}
else
{
if ((!v4only) && (checkset ("pokey@440", 3)))
myheader.carttype1 = myheader.carttype1 & (4 ^ 0xff);
if ((!v3only) && (checkset ("pokey@440", 4)))
{
if (checkset ("pokey@450", 4))
myheader.audio2 = (myheader.audio2 & 0xF8) | 2;
else
myheader.audio2 = (myheader.audio2 & 0xF8);
}
}
}
else if (strcmp (noun, "pokey@800") == 0)
{
if (set)
{
if (!v4only)
{
myheader.carttype1 = myheader.carttype1 | 128;
//unset other pokeys...
myheader.carttype2 = myheader.carttype2 & (1 ^ 0xff); // 4000
myheader.carttype2 = myheader.carttype2 & (64 ^ 0xff); // 450
myheader.carttype1 = myheader.carttype1 & (4 ^ 0xff); // 440
}
if (!v3only)
myheader.audio2 = (myheader.audio2 & 0xF8) | 4;
}
else
{
if ((!v4only) && (checkset ("pokey@800", 3)))
myheader.carttype1 = myheader.carttype1 & (128 ^ 0xff);
if ((!v3only) && (checkset ("pokey@800", 4)))
myheader.audio2 = (myheader.audio2 & 0xF8);
}
}
else if (strcmp (noun, "ym2151@460") == 0)
{
if (set)
{
if (!v4only)
myheader.carttype1 = myheader.carttype1 | 8;
if (!v3only)
myheader.audio2 = myheader.audio2 | 8;
}
else
{
if ((!v4only) && (checkset ("ym2151@460", 3)))
myheader.carttype1 = myheader.carttype1 & (8 ^ 0xff);
if ((!v3only) && (checkset ("ym2151@460", 4)))
myheader.audio2 = myheader.audio2 & (8 ^ 0xff);
}
}
else if (strcmp (noun, "covox@430") == 0)
{
if (set)
{
if (!v4only)
prwarn ("covox skipped in v3 header fields. (unsupported)\n");
if (!v3only)
myheader.audio2 = myheader.audio2 | 16;
}
else
{
if ((!v3only) && (checkset ("covox@430", 4)))
myheader.audio2 = myheader.audio2 & (16 ^ 0xff);
}
}
else if (strcmp (noun, "adpcm@420") == 0)
{
if (set)
{
if (!v4only)
prwarn ("adpcm@420 skipped in v3 header fields. (unsupported)\n");
if (!v3only)
myheader.audio2 = myheader.audio2 | 32;
}
else
{
if ((!v3only) && (checkset ("adpcm@420", 4)))
myheader.audio2 = myheader.audio2 & (32 ^ 0xff);
}
}
else if (strcmp (noun, "irqpokey1") == 0)
{
// this one is kind of a pain. v3 irq refers to specific devices,
// but v4 irq refers to pokey1,pokey2, and then specific devices,
// so we need to do some checking and mapping.
if (set)
{
if (!v4only)
{
if (checkset ("pokey@4000", 3))
myheader.irq = myheader.irq | 1;
else if (checkset ("pokey@450", 3))
myheader.irq = myheader.irq | 2;
else if (checkset ("pokey@800", 3))
myheader.irq = myheader.irq | 16;
}
if (!v3only)
if (checkset ("pokey@4000", 4) || checkset ("pokey@450", 4) || checkset ("pokey@800", 4))
myheader.interrupt2 = myheader.interrupt2 | 1;
}
else
{
if ((!v4only) && (checkset ("irqpokey1", 3)))
myheader.irq = myheader.irq & ((1 | 2 | 16) ^ 0xff); // strip pokey@4000,@450,@800
if ((!v3only) && (checkset ("irqpokey1", 4)))
myheader.interrupt2 = myheader.interrupt2 & (1 ^ 0xff);
}
}
else if (strcmp (noun, "irqpokey2") == 0)
{
if (set)
{
if (!v4only)
{
if (checkset ("pokey@440", 3))
myheader.irq = myheader.irq | 4;
}
if (!v3only)
if (checkset ("pokey@440", 4))
myheader.interrupt2 = myheader.interrupt2 | 2;
}
else
{
if ((!v4only) && (checkset ("irqpokey2", 3)))
myheader.irq = myheader.irq & (4 ^ 0xff); // strip @440
if ((!v3only) && (checkset ("irqpokey2", 4)))
myheader.interrupt2 = myheader.interrupt2 & (2 ^ 0xff);
}
}
else if (strcmp (noun, "irqym2151") == 0)
{
if (set)
{
if (!v4only)
{
if (checkset ("ym2151@460", 3))
myheader.irq = myheader.irq | 8;
}
if (!v3only)
if (checkset ("ym2151@460", 4))
myheader.interrupt2 = myheader.interrupt2 | 4;
}
else
{
if ((!v4only) && (checkset ("irqym2151", 3)))
myheader.irq = myheader.irq & (8 ^ 0xff); // strip @440
if ((!v3only) && (checkset ("irqym2151", 4)))
myheader.interrupt2 = myheader.interrupt2 & (4 ^ 0xff);
}
}
else if (strcmp (noun, "tvpal") == 0)
{
if (set)
myheader.tvformat = myheader.tvformat | 1;
else
myheader.tvformat = myheader.tvformat & 0xfe;
}
else if (strcmp (noun, "tvntsc") == 0)
{
if (set)
myheader.tvformat = myheader.tvformat & 0xfe;
else
myheader.tvformat = myheader.tvformat | 1;
}
else if (strcmp (noun, "composite") == 0)
{
if (set)
myheader.tvformat = myheader.tvformat | 2;
else
myheader.tvformat = myheader.tvformat & 0xfd;
}
else if (strcmp (noun, "mregion") == 0)
{
if (set)
myheader.tvformat = myheader.tvformat | 4;
else
myheader.tvformat = myheader.tvformat & 0xfb;
}
else if (strcmp (noun, "savekey") == 0)
{
if (set)
myheader.saveperipheral = myheader.saveperipheral | 2;
else
myheader.saveperipheral = myheader.saveperipheral & (2 ^ 0xff);
}
else if (strcmp (noun, "hsc") == 0)
{
if (set)
myheader.saveperipheral = myheader.saveperipheral | 1;
else