mirror of
https://github.com/holub/mame
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ddb290d5f6
Use standard uint64_t, uint32_t, uint16_t or uint8_t instead of UINT64, UINT32, UINT16 or UINT8 also use standard int64_t, int32_t, int16_t or int8_t instead of INT64, INT32, INT16 or INT8
229 lines
7.6 KiB
C++
229 lines
7.6 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Curt Coder
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/*********************************************************************
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cbm_crt.c
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Commodore C64 cartridge images in .CRT format
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This format was introduced in the CCS64 emulator by Per Hakan
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Sundell.
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Header info based on the VICE manual chapter 15.11, which in turn
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is based on CRT.txt rev 1.14 compiled by Peter Schepers, with
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additional contributions by Per Hakan Sundell, Markus Brenner,
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and Marco Van Den Heuvel.
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Relevant links:
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http://vice-emu.sourceforge.net/vice_15.html#SEC300
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http://ist.uwaterloo.ca/~schepers/formats/CRT.TXT (version 1.13, outdated)
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Header Contents (bytes $0000-003F):
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Bytes $0000-000F - 16-byte cartridge signature "C64 CARTRIDGE" (padded with spaces)
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$0010-0013 - File header length
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$0014-0015 - Cartridge version (high/low, presently 01.00)
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$0016-0017 - Cartridge hardware type ($0000, high/low), see below
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$0018 - Cartridge port EXROM line status (0 = inactive, 1 = active)
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$0019 - Cartridge port GAME line status (0 = inactive, 1 = active)
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$001A-001F - Reserved for future use
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$0020-003F - 32-byte cartridge name (uppercase, padded with null characters)
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CHIP Packet Contents (starting from $0040; there can be multiple CHIP packets
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in a single CRT file):
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Bytes $0040-0043 - Contained ROM signature "CHIP"
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$0044-0047 - Total packet length (ROM image size and header combined) (high/low format)
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$0048-0049 - Chip type (0 = ROM, 1 = RAM (no ROM data), 2 = Flash ROM)
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$004A-004B - Bank number
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$004C-004D - Starting load address (high/low format)
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$004E-004F - ROM image size in bytes (high/low format, typically $2000 or $4000)
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$0050-xxxx - ROM data
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*********************************************************************/
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#include "emu.h" // fatalerror
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#include "corefile.h"
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#include "cbm_crt.h"
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//**************************************************************************
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// MACROS/CONSTANTS
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//**************************************************************************
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#define LOG 0
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// slot names for the C64 cartridge types
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static const char * CRT_C64_SLOT_NAMES[_CRT_C64_COUNT] =
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{
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"standard", // 0 - Normal cartridge
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UNSUPPORTED, // 1 - Action Replay
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UNSUPPORTED, // 2 - KCS Power Cartridge
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"final3", // 3 - Final Cartridge III
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"simons_basic", // 4 - Simons' BASIC
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"ocean", // 5 - Ocean type 1
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UNSUPPORTED, // 6 - Expert Cartridge
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"fun_play", // 7 - Fun Play, Power Play
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"super_games", // 8 - Super Games
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UNSUPPORTED, // 9 - Atomic Power
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"epyxfastload", // 10 - Epyx Fastload
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"westermann", // 11 - Westermann Learning
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"rex", // 12 - Rex Utility
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"final", // 13 - Final Cartridge I
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"magic_formel", // 14 - Magic Formel
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"system3", // 15 - C64 Game System, System 3
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"warp_speed", // 16 - Warp Speed
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"dinamic", // 17 - Dinamic
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"zaxxon", // 18 - Zaxxon, Super Zaxxon (SEGA)
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"magic_desk", // 19 - Magic Desk, Domark, HES Australia
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UNSUPPORTED, // 20 - Super Snapshot V5
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"comal80", // 21 - Comal-80
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"struct_basic", // 22 - Structured BASIC
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"ross", // 23 - Ross
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"ep64", // 24 - Dela EP64
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"ep7x8", // 25 - Dela EP7x8
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"dela_ep256", // 26 - Dela EP256
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"rex_ep256", // 27 - Rex EP256
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"mikroasm", // 28 - Mikro Assembler
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UNSUPPORTED, // 29 - Final Cartridge Plus
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UNSUPPORTED, // 30 - Action Replay 4
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"stardos", // 31 - Stardos
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"easyflash", // 32 - EasyFlash
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UNSUPPORTED, // 33 - EasyFlash Xbank
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UNSUPPORTED, // 34 - Capture
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UNSUPPORTED, // 35 - Action Replay 3
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UNSUPPORTED, // 36 - Retro Replay
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UNSUPPORTED, // 37 - MMC64
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UNSUPPORTED, // 38 - MMC Replay
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"ide64", // 39 - IDE64
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UNSUPPORTED, // 40 - Super Snapshot V4
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"ieee488", // 41 - IEEE-488
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UNSUPPORTED, // 42 - Game Killer
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"prophet64", // 43 - Prophet64
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"exos", // 44 - EXOS
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UNSUPPORTED, // 45 - Freeze Frame
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UNSUPPORTED, // 46 - Freeze Machine
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UNSUPPORTED, // 47 - Snapshot64
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"super_explode", // 48 - Super Explode V5.0
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"magic_voice", // 49 - Magic Voice
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UNSUPPORTED, // 50 - Action Replay 2
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"mach5", // 51 - MACH 5
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UNSUPPORTED, // 52 - Diashow-Maker
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"pagefox", // 53 - Pagefox
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UNSUPPORTED, // 54 - ?
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"silverrock" // 55 - Silverrock
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};
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//**************************************************************************
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// IMPLEMENTATION
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//**************************************************************************
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//-------------------------------------------------
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// cbm_crt_get_card - get slot interface card
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//-------------------------------------------------
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std::string cbm_crt_get_card(util::core_file &file)
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{
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// read the header
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cbm_crt_header header;
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file.read(&header, CRT_HEADER_LENGTH);
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if (memcmp(header.signature, CRT_SIGNATURE, 16) == 0)
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{
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uint16_t hardware = pick_integer_be(header.hardware, 0, 2);
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return std::string(CRT_C64_SLOT_NAMES[hardware]);
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}
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return std::string();
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}
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//-------------------------------------------------
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// cbm_crt_read_header - read cartridge header
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//-------------------------------------------------
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bool cbm_crt_read_header(util::core_file &file, size_t *roml_size, size_t *romh_size, int *exrom, int *game)
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{
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// read the header
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cbm_crt_header header;
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file.read(&header, CRT_HEADER_LENGTH);
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if (memcmp(header.signature, CRT_SIGNATURE, 16) != 0)
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return false;
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uint16_t hardware = pick_integer_be(header.hardware, 0, 2);
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*exrom = header.exrom;
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*game = header.game;
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if (LOG)
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{
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osd_printf_verbose("Name: %s\n", header.name);
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osd_printf_verbose("Hardware: %04x\n", hardware);
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osd_printf_verbose("Slot device: %s\n", CRT_C64_SLOT_NAMES[hardware]);
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osd_printf_verbose("EXROM: %u\n", header.exrom);
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osd_printf_verbose("GAME: %u\n", header.game);
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}
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// determine ROM region lengths
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while (!file.eof())
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{
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cbm_crt_chip chip;
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file.read(&chip, CRT_CHIP_LENGTH);
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uint16_t address = pick_integer_be(chip.start_address, 0, 2);
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uint16_t size = pick_integer_be(chip.image_size, 0, 2);
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uint16_t type = pick_integer_be(chip.chip_type, 0, 2);
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if (LOG)
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{
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osd_printf_verbose("CHIP Address: %04x\n", address);
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osd_printf_verbose("CHIP Size: %04x\n", size);
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osd_printf_verbose("CHIP Type: %04x\n", type);
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}
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switch (address)
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{
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case 0x8000: *roml_size += size; break;
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case 0xa000: *romh_size += size; break;
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case 0xe000: *romh_size += size; break;
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default: osd_printf_verbose("Invalid CHIP loading address!\n"); break;
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}
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file.seek(size, SEEK_CUR);
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}
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return true;
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}
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//-------------------------------------------------
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// cbm_crt_read_data - read cartridge data
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//-------------------------------------------------
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bool cbm_crt_read_data(util::core_file &file, uint8_t *roml, uint8_t *romh)
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{
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uint32_t roml_offset = 0;
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uint32_t romh_offset = 0;
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file.seek(CRT_HEADER_LENGTH, SEEK_SET);
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while (!file.eof())
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{
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cbm_crt_chip chip;
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file.read(&chip, CRT_CHIP_LENGTH);
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uint16_t address = pick_integer_be(chip.start_address, 0, 2);
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uint16_t size = pick_integer_be(chip.image_size, 0, 2);
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switch (address)
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{
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case 0x8000: file.read(roml + roml_offset, size); roml_offset += size; break;
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case 0xa000: file.read(romh + romh_offset, size); romh_offset += size; break;
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case 0xe000: file.read(romh + romh_offset, size); romh_offset += size; break;
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}
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}
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return true;
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}
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