6 // (C) 2010 Underground Software
8 // JLH = James L. Hammons <jlhamm@acm.org>
11 // --- ---------- -------------------------------------------------------------
12 // JLH 01/16/2010 Created this log ;-)
13 // JLH 02/28/2010 Added functions to look inside .ZIP files and handle contents
25 #include "universalhdr.h"
29 // Private function prototypes
31 static int gzfilelength(gzFile gd);
32 static bool CheckExtension(const char * filename, const char * ext);
33 //static int ParseFileType(uint8 header1, uint8 header2, uint32 size);
35 // Private variables/enums
39 // Generic ROM loading
41 uint32 JaguarLoadROM(uint8 * &rom, char * path)
43 // We really should have some kind of sanity checking for the ROM size here to prevent
44 // a buffer overflow... !!! FIX !!!
45 #warning "!!! FIX !!! Should have sanity checking for ROM size to prevent buffer overflow!"
48 WriteLog("JaguarLoadROM: Attempting to load file '%s'...", path);
49 char * ext = strrchr(path, '.');
51 // No filename extension == YUO FAIL IT (it is loading the file).
52 // This is naive, but it works. But should probably come up with something a little
53 // more robust, to prevent problems with dopes trying to exploit this.
56 WriteLog("FAILED!\n");
60 WriteLog("Succeeded in finding extension (%s)!\n", ext);
61 WriteLog("VJ: Loading \"%s\"...", path);
63 if (strcasecmp(ext, ".zip") == 0)
65 // Handle ZIP file loading here...
66 WriteLog("(ZIPped)...");
68 // uint8_t * buffer = NULL;
69 // romSize = GetFileFromZIP(path, FT_SOFTWARE, buffer);
70 romSize = GetFileFromZIP(path, FT_SOFTWARE, rom);
74 WriteLog("Failed!\n");
78 // memcpy(rom, buffer, romSize);
83 // Handle gzipped files transparently [Adam Green]...
85 gzFile fp = gzopen(path, "rb");
89 WriteLog("Failed!\n");
93 romSize = gzfilelength(fp);
94 rom = new uint8[romSize];
95 gzseek(fp, 0, SEEK_SET);
96 gzread(fp, rom, romSize);
100 WriteLog("OK (%i bytes)\n", romSize);
106 // Jaguar file loading
107 // We do a more intelligent file analysis here instead of relying on (possible false)
108 // file extensions which people don't seem to give two shits about anyway. :-(
110 bool JaguarLoadFile(char * path)
112 uint8 * buffer = NULL;
113 jaguarROMSize = JaguarLoadROM(buffer, path);
115 if (jaguarROMSize == 0)
117 // It's up to the GUI to report errors, not us. :-)
118 WriteLog("FILE: Could not load ROM from file \"%s\"...\nAborting load!\n", path);
122 jaguarMainROMCRC32 = crc32_calcCheckSum(buffer, jaguarROMSize);
123 WriteLog("CRC: %08X\n", (unsigned int)jaguarMainROMCRC32);
124 // TODO: Check for EEPROM file in ZIP file. If there is no EEPROM in the user's EEPROM
125 // directory, copy the one from the ZIP file, if it exists.
127 jaguarRunAddress = 0x802000; // For non-BIOS runs, this is true
128 int fileType = ParseFileType(buffer[0], buffer[1], jaguarROMSize);
130 if (fileType == JST_ROM)
132 memcpy(jagMemSpace + 0x800000, buffer, jaguarROMSize);
136 else if (fileType == JST_ALPINE)
138 // File extension ".ROM": Alpine image that loads/runs at $802000
139 WriteLog("FILE: Setting up Alpine ROM... Run address: 00802000, length: %08X\n", jaguarROMSize);
140 memset(jagMemSpace + 0x800000, 0xFF, 0x2000);
141 memcpy(jagMemSpace + 0x802000, buffer, jaguarROMSize);
144 // Maybe instead of this, we could try requiring the STUBULATOR ROM? Just a thought...
145 // Try setting the vector to say, $1000 and putting an instruction there that loops forever:
146 // This kludge works! Yeah!
147 SET32(jaguarMainRAM, 0x10, 0x00001000);
148 SET16(jaguarMainRAM, 0x1000, 0x60FE); // Here: bra Here
151 else if (fileType == JST_ABS_TYPE1)
153 // For ABS type 1, run address == load address
154 uint32 loadAddress = GET32(buffer, 0x16),
155 codeSize = GET32(buffer, 0x02) + GET32(buffer, 0x06);
156 WriteLog("FILE: Setting up homebrew (ABS-1)... Run address: %08X, length: %08X\n", loadAddress, codeSize);
157 memcpy(jagMemSpace + loadAddress, buffer + 0x24, codeSize);
159 jaguarRunAddress = loadAddress;
162 else if (fileType == JST_ABS_TYPE2)
164 uint32 loadAddress = GET32(buffer, 0x28), runAddress = GET32(buffer, 0x24),
165 codeSize = GET32(buffer, 0x18) + GET32(buffer, 0x1C);
166 WriteLog("FILE: Setting up homebrew (ABS-2)... Run address: %08X, length: %08X\n", runAddress, codeSize);
167 memcpy(jagMemSpace + loadAddress, buffer + 0xA8, codeSize);
169 jaguarRunAddress = runAddress;
172 else if (fileType == JST_JAGSERVER)
174 uint32 loadAddress = GET32(buffer, 0x22), runAddress = GET32(buffer, 0x2A);
175 WriteLog("FILE: Setting up homebrew (Jag Server)... Run address: %08X, length: %08X\n", runAddress, jaguarROMSize - 0x2E);
176 memcpy(jagMemSpace + loadAddress, buffer + 0x2E, jaguarROMSize - 0x2E);
178 jaguarRunAddress = runAddress;
182 // We can assume we have JST_NONE at this point. :-P
187 // "Alpine" file loading
188 // Since the developers were coming after us with torches and pitchforks, we decided to
189 // allow this kind of thing. ;-) But ONLY FOR THE DEVS, DAMMIT! >:-U O_O
191 bool AlpineLoadFile(char * path)
193 uint8 * buffer = NULL;
194 jaguarROMSize = JaguarLoadROM(buffer, path);
196 if (jaguarROMSize == 0)
198 // It's up to the GUI to deal with failure, not us. ;-)
199 WriteLog("FILE: Could not load Alpine from file \"%s\"...\nAborting load!\n", path);
203 jaguarMainROMCRC32 = crc32_calcCheckSum(buffer, jaguarROMSize);
204 WriteLog("CRC: %08X\n", (unsigned int)jaguarMainROMCRC32);
207 jaguarRunAddress = 0x802000;
209 WriteLog("FILE: Setting up Alpine ROM with non-standard length... Run address: 00802000, length: %08X\n", jaguarROMSize);
211 memset(jagMemSpace + 0x800000, 0xFF, 0x2000);
212 memcpy(jagMemSpace + 0x802000, buffer, jaguarROMSize);
215 // Maybe instead of this, we could try requiring the STUBULATOR ROM? Just a thought...
216 // Try setting the vector to say, $1000 and putting an instruction there that loops forever:
217 // This kludge works! Yeah!
218 SET32(jaguarMainRAM, 0x10, 0x00001000);
219 SET16(jaguarMainRAM, 0x1000, 0x60FE); // Here: bra Here
225 // Get the length of a (possibly) gzipped file
227 static int gzfilelength(gzFile gd)
229 int size = 0, length = 0;
230 unsigned char buffer[0x10000];
236 // Read in chunks until EOF
237 size = gzread(gd, buffer, 0x10000);
251 // Compare extension to passed in filename. If equal, return true; otherwise false.
253 static bool CheckExtension(const char * filename, const char * ext)
255 // Sanity checking...
256 if ((filename == NULL) || (ext == NULL))
259 const char * filenameExt = strrchr(filename, '.'); // Get the file's extension (if any)
261 if (filenameExt == NULL)
264 return (strcasecmp(filenameExt, ext) == 0 ? true : false);
268 // Get file from .ZIP
269 // Returns the size of the file inside the .ZIP file that we're looking at
270 // NOTE: If the thing we're looking for is found, it allocates it in the passed in buffer.
271 // Which means we have to deallocate it later.
273 uint32 GetFileFromZIP(const char * zipFile, FileType type, uint8 * &buffer)
275 // NOTE: We could easily check for this by discarding anything that's larger than the RAM/ROM
276 // size of the Jaguar console.
277 #warning "!!! FIX !!! Should have sanity checking for ROM size to prevent buffer overflow!"
278 const char ftStrings[5][32] = { "Software", "EEPROM", "Label", "Box Art", "Controller Overlay" };
279 ZIP * zip = openzip(0, 0, zipFile);
283 WriteLog("FILE: Could not open file '%s'!\n", zipFile);
290 // The order is here is important: If the file is found, we need to short-circuit the
291 // readzip() call because otherwise, 'ze' will be pointing to the wrong file!
292 while (!found && readzip(zip))
296 // Here we simply rely on the file extension to tell the truth, but we know
297 // that extensions lie like sons-a-bitches. So this is naive, we need to do
298 // something a little more robust to keep bad things from happening here.
299 #warning "!!! Checking for image by extension can be fooled !!!"
300 if ((type == FT_LABEL) && (CheckExtension(ze->name, ".png") || CheckExtension(ze->name, ".jpg") || CheckExtension(ze->name, ".gif")))
303 WriteLog("FILE: Found image file '%s'.\n", ze->name);
306 if ((type == FT_SOFTWARE) && (CheckExtension(ze->name, ".j64")
307 || CheckExtension(ze->name, ".rom") || CheckExtension(ze->name, ".abs")
308 || CheckExtension(ze->name, ".cof") || CheckExtension(ze->name, ".jag")))
311 WriteLog("FILE: Found software file '%s'.\n", ze->name);
314 if ((type == FT_EEPROM) && (CheckExtension(ze->name, ".eep") || CheckExtension(ze->name, ".eeprom")))
317 WriteLog("FILE: Found EEPROM file '%s'.\n", ze->name);
325 WriteLog("FILE: Uncompressing...");
326 // Insert file size sanity check here...
327 buffer = new uint8[ze->uncompressed_size];
329 if (readuncompresszip(zip, ze, (char *)buffer) == 0)
331 fileSize = ze->uncompressed_size;
332 WriteLog("success! (%u bytes)\n", fileSize);
338 WriteLog("FAILED!\n");
342 // Didn't find what we're looking for...
343 WriteLog("FILE: Failed to find file of type %s...\n", ftStrings[type]);
350 // Parse the file type based upon file size and/or headers.
352 uint32 ParseFileType(uint8 header1, uint8 header2, uint32 size)
354 // Check headers first...
357 if (header1 == 0x60 && header2 == 0x1B)
358 return JST_ABS_TYPE1;
361 if (header1 == 0x01 && header2 == 0x50)
362 return JST_ABS_TYPE2;
365 if (header1 == 0x60 && header2 == 0x1A)
366 return JST_JAGSERVER;
368 // And if that fails, try file sizes...
370 // If the file size is divisible by 1M, we probably have an regular ROM.
371 // We can also check our CRC32 against the internal ROM database to be sure.
372 if ((size % 1048576) == 0)
375 // If the file size + 8192 bytes is divisible by 1M, we probably have an
376 // Alpine format ROM.
377 if (((size + 8192) % 1048576) == 0)
385 // Check for universal header
387 bool HasUniversalHeader(uint8 * rom, uint32 romSize)
393 for(int i=0; i<8192; i++)
394 if (rom[i] != universalCartHeader[i])
404 Stubulator ROM vectors...
405 handler 001 at $00E00008
406 handler 002 at $00E008DE
407 handler 003 at $00E008E2
408 handler 004 at $00E008E6
409 handler 005 at $00E008EA
410 handler 006 at $00E008EE
411 handler 007 at $00E008F2
412 handler 008 at $00E0054A
413 handler 009 at $00E008FA
414 handler 010 at $00000000
415 handler 011 at $00000000
416 handler 012 at $00E008FE
417 handler 013 at $00E00902
418 handler 014 at $00E00906
419 handler 015 at $00E0090A
420 handler 016 at $00E0090E
421 handler 017 at $00E00912
422 handler 018 at $00E00916
423 handler 019 at $00E0091A
424 handler 020 at $00E0091E
425 handler 021 at $00E00922
426 handler 022 at $00E00926
427 handler 023 at $00E0092A
428 handler 024 at $00E0092E
429 handler 025 at $00E0107A
430 handler 026 at $00E0107A
431 handler 027 at $00E0107A
432 handler 028 at $00E008DA
433 handler 029 at $00E0107A
434 handler 030 at $00E0107A
435 handler 031 at $00E0107A
436 handler 032 at $00000000
438 Let's try setting up the illegal instruction vector for a stubulated jaguar...
440 SET32(jaguar_mainRam, 0x08, 0x00E008DE);
441 SET32(jaguar_mainRam, 0x0C, 0x00E008E2);
442 SET32(jaguar_mainRam, 0x10, 0x00E008E6); // <-- Should be here (it is)...
443 SET32(jaguar_mainRam, 0x14, 0x00E008EA);//*/
446 ABS Format sleuthing (LBUGDEMO.ABS):
448 000000 60 1B 00 00 05 0C 00 04 62 C0 00 00 04 28 00 00
449 000010 12 A6 00 00 00 00 00 80 20 00 FF FF 00 80 25 0C
452 DRI-format file detected...
453 Text segment size = 0x0000050c bytes
454 Data segment size = 0x000462c0 bytes
455 BSS Segment size = 0x00000428 bytes
456 Symbol Table size = 0x000012a6 bytes
457 Absolute Address for text segment = 0x00802000
458 Absolute Address for data segment = 0x0080250c
459 Absolute Address for BSS segment = 0x00004000
462 000000 01 50 00 03 00 00 00 00 00 03 83 10 00 00 05 3b
463 000010 00 1c 00 03 00 00 01 07 00 00 1d d0 00 03 64 98
464 000020 00 06 8b 80 00 80 20 00 00 80 20 00 00 80 3d d0
466 000030 2e 74 78 74 00 00 00 00 00 80 20 00 00 80 20 00 .txt (+36 bytes)
467 000040 00 00 1d d0 00 00 00 a8 00 00 00 00 00 00 00 00
468 000050 00 00 00 00 00 00 00 20
469 000058 2e 64 74 61 00 00 00 00 00 80 3d d0 00 80 3d d0 .dta (+36 bytes)
470 000068 00 03 64 98 00 00 1e 78 00 00 00 00 00 00 00 00
471 000078 00 00 00 00 00 00 00 40
472 000080 2e 62 73 73 00 00 00 00 00 00 50 00 00 00 50 00 .bss (+36 bytes)
473 000090 00 06 8b 80 00 03 83 10 00 00 00 00 00 00 00 00
474 0000a0 00 00 00 00 00 00 00 80
476 Header size is $A8 bytes...
478 BSD/COFF format file detected...
480 Symbol Table offset = 230160 ($00038310)
481 Symbol Table contains 1339 symbol entries ($0000053B)
482 The additional header size is 28 bytes ($001C)
483 Magic Number for RUN_HDR = 0x00000107
484 Text Segment Size = 7632 ($00001DD0)
485 Data Segment Size = 222360 ($00036498)
486 BSS Segment Size = 428928 ($00068B80)
487 Starting Address for executable = 0x00802000
488 Start of Text Segment = 0x00802000
489 Start of Data Segment = 0x00803dd0