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Diffstat (limited to 'src/mess/drivers/gb.c')
-rw-r--r-- | src/mess/drivers/gb.c | 984 |
1 files changed, 0 insertions, 984 deletions
diff --git a/src/mess/drivers/gb.c b/src/mess/drivers/gb.c deleted file mode 100644 index 85311e19598..00000000000 --- a/src/mess/drivers/gb.c +++ /dev/null @@ -1,984 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Anthony Kruize,Wilbert Pol -/*************************************************************************** - - gb.c - - Driver file to handle emulation of the Nintendo Game Boy. - By: - - Hans de Goede 1998 - Anthony Kruize 2002 - Wilbert Pol 2004 (Megaduck/Cougar Boy) - - TODO list: - - Do correct lcd stat timing - - Add Game Boy Light (Japan, 1997) - does it differ from gbpocket? - - SGB should be moved to SNES driver - - Emulate OAM corruption bug on 16bit inc/dec in $fe** region - - -Timers -====== - -There seems to be some kind of selectable internal clock divider which is used to drive -the timer increments. This causes the first timer cycle to now always be a full cycle. -For instance in 1024 clock cycle mode, the first timer cycle could easily only take 400 -clock cycles. The next timer cycle will take the full 1024 clock cycles though. - -Writes to the DIV register seem to cause this internal clock divider/register to be -reset in such a way that the next stimulus cause a timer increment (in any mode). - - -Interrupts -========== - -Taking an interrupt seems to take around 20 clock cycles. - - -Stat timing -=========== - -This timing table is accurate within 4 cycles: - | stat = 2 | stat = 3 | stat = 0 | -No sprites | 80 | 172 | 204 | -1 sprite | 80 | 182 | 194 | -2 sprites | 80 | 192 | 184 | -3 sprites | 80 | 202 | 174 | -4 sprites | 80 | 212 | 164 | -5 sprites | 80 | 222 | 154 | -6 sprites | 80 | 232 | 144 | -7 sprites | 80 | 242 | 134 | -8 sprites | 80 | 252 | 124 | -9 sprites | 80 | 262 | 114 | -10 sprites | 80 | 272 | 104 | - -In other words, each sprite on a line makes stat 3 last 10 cycles longer. - - -For lines 1 - 143 when stat changes to 2 the line counter is incremented. - -Line 153 is little odd timing wise. The line counter stays 153 for ~4 clock cycles -and is then rolls over to 0. - -When the line counter is changed it gets checked against the lyc register. - -Here is a detailed run of the STAT and LY register together with LYC set to 3 on a -dmg and mgb. The time between each sample is 4 clock cycles: -STAT: -22222222 22233333 33333333 33333333 33333333 33333333 33333300 00000000 00000000 00000000 -00000000 00000000 00000000 06666666 66666666 66666777 77777777 77777777 77777777 77777777 -77777777 44444444 44444444 44444444 44444444 44444444 44444444 44022222 22222222 - - LY: -33333333 33333333 33333333 33333333 33333333 33333333 33333333 33333333 33333333 33333333 -33333333 33333333 33333333 44444444 44444444 44444444 44444444 44444444 44444444 44444444 -44444444 44444444 44444444 44444444 44444444 44444444 44444444 44555555 55555555 - ^ ^ - -As you can see, it seems as though the LY register is incremented slightly before the STAT -register is changed, resulting in a short period where STAT goes 0 before going to 2. This -bug/feature has been fixed in the CGB and AGB. - - - -Around lines 152-153-0 the picture becomes as follows: -STAT: -11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 -11111111 11111111 11111111 15555555 55555555 55555555 55555555 55555555 55555555 55555555 -55555555 55555555 55555555 55555555 55555555 55555555 55555555 55111111 11111111 11111111 -11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 -11111111 11110222 22222222 22222222 23333333 33333333 33333333 33333333 33333333 - - LY: -77777777 77777777 77777777 77777777 77777777 77777777 77777777 77777777 77777777 77777777 -77777777 77777777 77777777 88888888 88888888 88888888 88888888 88888888 88888888 88888888 -88888888 88888888 88888888 88888888 88888888 88888888 88888888 88900000 00000000 00000000 -00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 -00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 - - - -The full STAT/LY value state machine. -===================================== - -The timing information below is with sprites disabled. - -For STAT we only show the lower 3 bits and for LY only the lower 5 bits of the full -register. Each digit stands for 4 clock cycles (the smallest measurable unit on a -dmg or mgb). When the video hardware is switched on the LY register is set 0 and -the STAT mode is 0. The values for STAT and LY will change as follows: - -STAT 000000000000000000003333333333333333333333333333333333333333333000000000000000000000000000000000000000000000000000 - LY 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 line #0 - ^LY=LYC bit can get set here LY=LYC bit is reset here^ - -STAT 222222222222222222223333333333333333333333333333333333333333333000000000000000000000000000000000000000000000000000 - LY 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112 line #1 - - : - : - -STAT 222222222222222222223333333333333333333333333333333333333333333000000000000000000000000000000000000000000000000000 - LY FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0 line #143 - -STAT 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 - LY 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 line #144 - - : - : - -STAT 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 - LY 888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888889 line #152 - -STAT 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111110 - LY 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 line #153 - ^ - LY=LYC interrupt for 153 can get triggered here - -STAT 222222222222222222223333333333333333333333333333333333333333333000000000000000000000000000000000000000000000000000 - LY 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 line #0 - -STAT 222222222222222222223333333333333333333333333333333333333333333000000000000000000000000000000000000000000000000000 - LY 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112 line #1 - - : - etc - - -Mappers used in the Game Boy -=========================== - -MBC1 Mapper -=========== - -The MBC1 mapper has two modes: 2MB ROM/8KB RAM or 512KB ROM/32KB RAM. -This mode is selected by writing into the 6000-7FFF memory area: -0bXXXXXXXB - B=0 - 2MB ROM/8KB RAM mode - B=1 - 512KB ROM/32KB RAM mode -The default behaviour is to be in 2MB ROM/8KB RAM mode. - -Writing a value ( 0bXXXBBBBB ) into the 2000-3FFF memory area selects the -lower 5 bits of the ROM bank to select for the 4000-7FFF memory area. If a -value of 0bXXX00000 is written then this will autmatically be changed to -0bXXX00001 by the mbc chip. - -Writing a value (0bXXXXXXBB ) into the 4000-5FFF memory area either selects -the RAM bank to use or bits 6 and 7 for the ROM bank to use for the 4000-7FFF -memory area. This behaviour depends on the memory moddel chosen. - -The RAM sections are enabled by writing the value 0bXXX1010 into the 0000-1FFF -memory area. Writing any other value disables the RAM section. - -Some unanswered cases: -#1 - Set mode 0 - - Set lower bank bits to 1F - - Set high bank bits to 01 => bank #3F - - Set mode 1 - - What ROM bank is now at 4000-7FFF, bank #1F or bank #3F? - -#2 - Set mode 1 - - Set ram area #1 - - Set mode 0 - - What ram area is now at A000-BFFF, ram bank 00 or ram bank 01? - - -MBC2 Mapper -=========== - -The MBC2 mapper includes 512x4bits of builtin RAM. - -0000-1FFF - Writing to this area enables (value 0bXXXX1010) or disables (any - other value than 0bXXXX1010) the RAM. In order to perform this - function bit 12 of the address must be reset, so usable areas are - 0000-00FF, 0200-02FF, 0400-04FF, 0600-06FF, ..., 1E00-1EFF. -2000-3FFF - Writing to this area selects the rom bank to appear at 4000-7FFF. - Only bits 3-0 are used to select the bank number. If a value of - 0bXXXX0000 is written then this is automatically changed into - 0bXXXX0001 by the mapper. - In order to perform the rom banking bit 12 of the address must be - set, so usable areas are 2100-21FF, 2300-23FF, 2500-25FF, 2700- - 27FF, ..., 3F00-3FFF. - -Some unanswered cases: -#1 - Set rom bank to 8 for a 4 bank rom image. - - What rom bank appears at 4000-7FFF, bank #0 or bank #1 ? - - -MBC3 Mapper -=========== - -The MBC3 mapper cartridges can include a RTC chip. - -0000-1FFF - Writing to this area enables (value 0x0A) or disables (0x00) the - RAM and RTC registers. -2000-3FFF - Writing to this area selects the rom bank to appear at 4000-7FFF. - Bits 6-0 are used to select the bank number. If a value of - 0bX0000000 is written then this is autmatically changed into - 0bX0000001 by the mapper. -4000-5FFF - Writing to this area selects the RAM bank or the RTC register to - read. - XXXX00bb - Select RAM bank bb. - XXXX1rrr - Select RTC register rrr. Accepted values for rrr are: - 000 - Seconds (0x00-0x3B) - 001 - Minutes (0x00-0x3B) - 010 - Hours (0x00-0x17) - 011 - Bits 7-0 of the day counter - 100 - bit 0 - Bit 8 of the day counter - bit 6 - Halt RTC timer ( 0 = timer active, 1 = halted) - bit 7 - Day counter overflow flag -6000-7FFF - Writing 0x00 followed by 0x01 latches the RTC data. This latching - method is used for reading the RTC registers. - -Some unanswered cases: -#1 - Set rom bank to 8(/16/32/64) for a 4(/8/16/32) bank image. - - What rom bank appears at 4000-7FFF, bank #0 or bank #1 ? - - -MBC4 Mapper -=========== - -Stauts: not supported yet. - - -MBC5 Mapper -=========== - -0000-1FFF - Writing to this area enables (0x0A) or disables (0x00) the RAM area. -2000-2FFF - Writing to this area updates bits 7-0 of the rom bank number to - appear at 4000-7FFF. -3000-3FFF - Writing to this area updates bit 8 of the rom bank number to appear - at 4000-7FFF. -4000-5FFF - Writing to this area select the RAM bank number to use. If the - cartridge includes a Rumble Pack then bit 3 is used to control - rumble motor (0 - disable motor, 1 - enable motor). - - -MBC7 Mapper (Used by Kirby's Tilt n' Tumble, Command Master) -=========== - -Status: Partial support (only ROM banking supported at the moment) - -The MBC7 mapper has 0x0200(?) bytes of RAM built in. - -0000-1FFF - Probably enable/disable RAM - In order to use this area bit 12 of the address be set. - Values written: 00, 0A -2000-2FFF - Writing to this area selects the ROM bank to appear at - 4000-7FFF. - In order to use this area bit 12 of the address be set. - Values written: 01, 07, 01, 1C -3000-3FFF - Unknown - In order to use this area bit 12 of the address be set. - Values written: 00 -4000-4FFF - Unknown - In order to use this area bit 12 of the address be set. - Values written: 00, 40, 3F - - -TAMA5 Mapper (Used by Tamagotchi 3) -============ - -Status: partially supported. - -The TAMA5 mapper includes a special RTC chip which communicates through the -RAM area (0xA000-0xBFFF); most notably addresses 0xA000 and 0xA001 seem to -be used. In this setup 0xA001 acts like a control register and 0xA000 like -a data register. - -Accepted values by the TAMA5 control register: -0x00 - Writing to 0xA000 will set bits 3-0 for rom bank selection. -0x01 - Writing to 0xA000 will set bits (7-?)4 for rom bank selection. - -0x04 - Bits 3-0 of the value to write -0x05 - Bits 4-7 of the value to write -0x06 - Address control hi - bit 0 - Bit 4 for the address - bit 3-1 - 000 - Write a byte to the 32 byte memory. The data to be - written must be set in registers 0x04 (lo nibble) and - 0x05 (hi nibble). - - 001 - Read a byte from the 32 byte memory. The data read - will be available in registers 0x0C (lo nibble) and - 0x0D (hi nibble). - - 010 - Unknown (occurs just after having started a game and - entered a date) (execution at address 1A19) - - 011 - Unknown (not encountered yet) - - 100 - Unknown (occurs during booting a game; appears to be - some kind of read command as it is followed by a read - of the 0x0C register) (execution at address 1B5B) - - 101 - Unknown (not encountered yet) - - 110 - Unknown (not encountered yet) - - 111 - Unknown (not encountered yet) -0x07 - Address control lo - bit 3-0 - bits 3-0 for the address - -0x0A - After writing this the lowest 2 bits of A000 determine whether the - TAMA5 chip is ready to accept the next command. If the lowest 2 bits - hold the value 01 then the TAMA5 chip is ready for the next command. - -0x0C - Reading from A000 will return bits 3-0 of the data -0x0D - Reading from A000 will return bits 7-4 of the data - -0x04 - RTC controls? -> RTC/memory? -0x05 - Write time/memomry? -0x06 - RTC controls? -0x07 - RTC controls? - -Unknown sequences: -During booting a game (1B5B: -04 <- 00, 06 <- 08, 07 <- 01, followed by read 0C -when value read from 0C equals 00 followed by the sequence: -04 <- 01, 06 <- 08, 07 <- 01, followed by read 0C -the value read from 0C is checked for non-zero, don't know the consequences for either -yet. - -Initialization after starting a game: -At address 1A19: -06 <- 05, 07 <- 02, followed by read 0C, if != 0F => OK, otherwise do something. - - -MMM01 mapper -============ - -Used by: Momotarou Collection 2, Taito Pack - -Status: not supported yet. - -Momotarou Collection 2: - -MOMOTARODENGEKI2, 0x00000, blocks 0x00 - 0x1F -0x147: 01 04 00 00 33 00 -MOMOTAROU GAIDEN, 0x80000, blocks 0x20 - 0x3F -0x147: 06 03 00 00 18 00 - -When picking top option: -3FFF <- 20 -5FFF <- 40 -7FFF <- 21 -1FFF <- 3A -1FFF <- 7A - -When picking bottom option: -3FFF <- 00 -5FFF <- 01 -7FFF <- 01 -1FFF <- 3A -1FFF <- 7A - -Taito Pack (MMM01+RAM, 512KB, 64KB RAM): -1st option (BUBBLE BOBBLE, blocks 0x10 - 0x17, MBC1+RAM, 128KB, 8KB RAM): - 2000 <- 70 01110000 => starting block, 10000 - 6000 <- 30 00110000 => 8 blocks - 4000 <- 70 01110000 => ??? - 0000 <- 40 01000000 => upper 3 bits determine lower 3 bits of starting block? - -2nd option (ELEVATOR ACTION, blocks 0x18 - 0x1B, MBC1, 64KB, 2KB RAM): - 2000 <- 78 01111000 => starting block, 11000 - 6000 <- 38 00111000 => 4 blocks - 4000 <- 70 01110000 => ??? - 0000 <- 40 01000000 => upper 3 bits determine lower 3 bits of starting block? - -3rd option (CHASE HQ, blocks 0x08 - 0x0F, MBC1+RAM, 128KB, 8KB RAM): - 2000 <- 68 01101000 => starting block, 01000 - 6000 <- 30 00110000 => 8 blocks - 4000 <- 70 01110000 => ??? - 0000 <- 40 01000000 => upper 3 bits determine lower 3 bits of starting block? - -4th option (SAGAIA, blocks 0x00 - 0x07, MBC1+RAM, 128KB, 8KB RAM): - 2000 <- 60 01100000 => starting block, 00000 - 6000 <- 30 00110000 => 8 blocks - 4000 <- 70 01110000 => ??? - 0000 <- 40 01000000 => upper 3 bits determine lower 3 bits of starting block? - -Known: -The last 2 banks in a MMM01 dump are actually the starting banks for a MMM01 image. - -0000-1FFF => bit6 set => perform mapping - -Possible mapping registers: -1FFF - Enable RAM ??? -3FFF - xxxbbbbb - Bit0-5 of the rom bank to select at 0x4000-0x7FFF ? - - -HuC1 mapper -=========== - -Status: not supported yet. - - -HuC3 mapper -=========== - -Status: not supported yet. - - -Wisdom Tree mapper -================== - -The Wisdom Tree mapper is triggered by writes in the 0x0000-0x3FFF area. The -address written to determines the bank to switch in in the 0x000-0x7FFF address -space. This mapper uses 32KB sized banks. - - -***************************************************************************/ - -#include "emu.h" -#include "rendlay.h" -#include "includes/gb.h" -#include "bus/gameboy/rom.h" -#include "bus/gameboy/mbc.h" - - -READ8_MEMBER(gb_state::gb_cart_r) -{ - if (m_bios_disable && m_cartslot) - return m_cartslot->read_rom(space, offset); - else - { - if (offset < 0x100) - { - UINT8 *ROM = m_region_maincpu->base(); - if (m_bios_hack->read()) - { - // patch out logo and checksum checks - // (useful to run some pirate carts until we implement - // their complete functionalities + to test homebrew) - if (offset == 0xe9 || offset == 0xea) - return 0x00; - if (offset == 0xfa || offset == 0xfb) - return 0x00; - } - return ROM[offset]; - } - else if (m_cartslot) - { - return m_cartslot->read_rom(space, offset); - } - else - return 0xff; - } -} - -READ8_MEMBER(gb_state::gbc_cart_r) -{ - if (m_bios_disable && m_cartslot) - return m_cartslot->read_rom(space, offset); - else - { - if (offset < 0x100) - { - UINT8 *ROM = m_region_maincpu->base(); - if (m_bios_hack->read()) - { - // patch out logo and checksum checks - // (useful to run some pirate carts until we implement - // their complete functionalities + to test homebrew) - if (offset == 0xdb || offset == 0xdc) - return 0x00; - if (offset == 0xed || offset == 0xee) - return 0x00; - } - return ROM[offset]; - } - else if (offset >= 0x200 && offset < 0x900) - { - UINT8 *ROM = m_region_maincpu->base(); - return ROM[offset - 0x100]; - } - else if (m_cartslot) - { - return m_cartslot->read_rom(space, offset); - } - else - return 0xff; - } -} - -WRITE8_MEMBER(gb_state::gb_bank_w) -{ - if (m_cartslot) - m_cartslot->write_bank(space, offset, data); -} - -READ8_MEMBER(gb_state::gb_ram_r) -{ - if (m_cartslot) - return m_cartslot->read_ram(space, offset); - else - return 0xff; -} - -WRITE8_MEMBER(gb_state::gb_ram_w) -{ - if (m_cartslot) - m_cartslot->write_ram(space, offset, data); -} - -READ8_MEMBER(gb_state::gb_echo_r) -{ - return space.read_byte(0xc000 + offset); -} - -WRITE8_MEMBER(gb_state::gb_echo_w) -{ - return space.write_byte(0xc000 + offset, data); -} - -READ8_MEMBER(megaduck_state::cart_r) -{ - if (m_cartslot) - return m_cartslot->read_rom(space, offset); - else - return 0xff; -} - -WRITE8_MEMBER(megaduck_state::bank1_w) -{ - if (m_cartslot) - m_cartslot->write_bank(space, offset, data); -} - -WRITE8_MEMBER(megaduck_state::bank2_w) -{ - if (m_cartslot) - m_cartslot->write_ram(space, offset, data); /* used for bankswitch, but we re-use GB name */ -} - - -static ADDRESS_MAP_START(gameboy_map, AS_PROGRAM, 8, gb_state ) - ADDRESS_MAP_UNMAP_HIGH - AM_RANGE(0x0000, 0x7fff) AM_READWRITE(gb_cart_r, gb_bank_w) - AM_RANGE(0x8000, 0x9fff) AM_DEVREADWRITE("lcd", gb_lcd_device, vram_r, vram_w) /* 8k VRAM */ - AM_RANGE(0xa000, 0xbfff) AM_READWRITE(gb_ram_r, gb_ram_w) /* 8k switched RAM bank (cartridge) */ - AM_RANGE(0xc000, 0xdfff) AM_RAM /* 8k low RAM */ - AM_RANGE(0xe000, 0xfdff) AM_READWRITE(gb_echo_r, gb_echo_w) /* echo RAM */ - AM_RANGE(0xfe00, 0xfeff) AM_DEVREADWRITE("lcd", gb_lcd_device, oam_r, oam_w) /* OAM RAM */ - AM_RANGE(0xff00, 0xff0f) AM_READWRITE(gb_io_r, gb_io_w) /* I/O */ - AM_RANGE(0xff10, 0xff26) AM_DEVREADWRITE("custom", gameboy_sound_device, sound_r, sound_w) /* sound registers */ - AM_RANGE(0xff27, 0xff2f) AM_NOP /* unused */ - AM_RANGE(0xff30, 0xff3f) AM_DEVREADWRITE("custom", gameboy_sound_device, wave_r, wave_w) /* Wave ram */ - AM_RANGE(0xff40, 0xff7f) AM_DEVREAD("lcd", gb_lcd_device, video_r) AM_WRITE(gb_io2_w) /* Video controller & BIOS flip-flop */ - AM_RANGE(0xff80, 0xfffe) AM_RAM /* High RAM */ - AM_RANGE(0xffff, 0xffff) AM_READWRITE(gb_ie_r, gb_ie_w) /* Interrupt enable register */ -ADDRESS_MAP_END - -static ADDRESS_MAP_START(sgb_map, AS_PROGRAM, 8, gb_state ) - ADDRESS_MAP_UNMAP_HIGH - AM_RANGE(0x0000, 0x7fff) AM_READWRITE(gb_cart_r, gb_bank_w) - AM_RANGE(0x8000, 0x9fff) AM_DEVREADWRITE("lcd", sgb_lcd_device, vram_r, vram_w) /* 8k VRAM */ - AM_RANGE(0xa000, 0xbfff) AM_READWRITE(gb_ram_r, gb_ram_w) /* 8k switched RAM bank (cartridge) */ - AM_RANGE(0xc000, 0xdfff) AM_RAM /* 8k low RAM */ - AM_RANGE(0xe000, 0xfdff) AM_READWRITE(gb_echo_r, gb_echo_w) /* echo RAM */ - AM_RANGE(0xfe00, 0xfeff) AM_DEVREADWRITE("lcd", sgb_lcd_device, oam_r, oam_w) /* OAM RAM */ - AM_RANGE(0xff00, 0xff0f) AM_READWRITE(gb_io_r, sgb_io_w) /* I/O */ - AM_RANGE(0xff10, 0xff26) AM_DEVREADWRITE("custom", gameboy_sound_device, sound_r, sound_w) /* sound registers */ - AM_RANGE(0xff27, 0xff2f) AM_NOP /* unused */ - AM_RANGE(0xff30, 0xff3f) AM_DEVREADWRITE("custom", gameboy_sound_device, wave_r, wave_w) /* Wave RAM */ - AM_RANGE(0xff40, 0xff7f) AM_DEVREAD("lcd", sgb_lcd_device, video_r) AM_WRITE(gb_io2_w) /* Video controller & BIOS flip-flop */ - AM_RANGE(0xff80, 0xfffe) AM_RAM /* High RAM */ - AM_RANGE(0xffff, 0xffff) AM_READWRITE(gb_ie_r, gb_ie_w) /* Interrupt enable register */ -ADDRESS_MAP_END - -static ADDRESS_MAP_START(gbc_map, AS_PROGRAM, 8, gb_state ) - ADDRESS_MAP_UNMAP_HIGH - AM_RANGE(0x0000, 0x7fff) AM_READWRITE(gbc_cart_r, gb_bank_w) - AM_RANGE(0x8000, 0x9fff) AM_DEVREADWRITE("lcd", cgb_lcd_device, vram_r, vram_w) /* 8k VRAM */ - AM_RANGE(0xa000, 0xbfff) AM_READWRITE(gb_ram_r, gb_ram_w) /* 8k switched RAM bank (cartridge) */ - AM_RANGE(0xc000, 0xcfff) AM_RAM /* 4k fixed RAM bank */ - AM_RANGE(0xd000, 0xdfff) AM_RAMBANK("cgb_ram") /* 4k switched RAM bank */ - AM_RANGE(0xe000, 0xfdff) AM_READWRITE(gb_echo_r, gb_echo_w) /* echo RAM */ - AM_RANGE(0xfe00, 0xfeff) AM_DEVREADWRITE("lcd", cgb_lcd_device, oam_r, oam_w) /* OAM RAM */ - AM_RANGE(0xff00, 0xff0f) AM_READWRITE(gb_io_r, gb_io_w) /* I/O */ - AM_RANGE(0xff10, 0xff26) AM_DEVREADWRITE("custom", gameboy_sound_device, sound_r, sound_w) /* sound controller */ - AM_RANGE(0xff27, 0xff2f) AM_NOP /* unused */ - AM_RANGE(0xff30, 0xff3f) AM_DEVREADWRITE("custom", gameboy_sound_device, wave_r, wave_w) /* Wave RAM */ - AM_RANGE(0xff40, 0xff7f) AM_READWRITE(gbc_io2_r, gbc_io2_w) /* Other I/O and video controller */ - AM_RANGE(0xff80, 0xfffe) AM_RAM /* high RAM */ - AM_RANGE(0xffff, 0xffff) AM_READWRITE(gb_ie_r, gb_ie_w) /* Interrupt enable register */ -ADDRESS_MAP_END - -static ADDRESS_MAP_START(megaduck_map, AS_PROGRAM, 8, megaduck_state ) - ADDRESS_MAP_UNMAP_HIGH - AM_RANGE(0x0000, 0x7fff) AM_READWRITE(cart_r, bank1_w) - AM_RANGE(0x8000, 0x9fff) AM_DEVREADWRITE("lcd", gb_lcd_device, vram_r, vram_w) /* 8k VRAM */ - AM_RANGE(0xa000, 0xafff) AM_NOP /* unused? */ - AM_RANGE(0xb000, 0xb000) AM_WRITE(bank2_w) - AM_RANGE(0xb001, 0xbfff) AM_NOP /* unused? */ - AM_RANGE(0xc000, 0xfe9f) AM_RAM /* 8k low RAM, echo RAM */ - AM_RANGE(0xfe00, 0xfeff) AM_DEVREADWRITE("lcd", gb_lcd_device, oam_r, oam_w) /* OAM RAM */ - AM_RANGE(0xff00, 0xff0f) AM_READWRITE(gb_io_r, gb_io_w) /* I/O */ - AM_RANGE(0xff10, 0xff1f) AM_READWRITE(megaduck_video_r, megaduck_video_w) /* video controller */ - AM_RANGE(0xff20, 0xff2f) AM_READWRITE(megaduck_sound_r1, megaduck_sound_w1) /* sound controller pt1 */ - AM_RANGE(0xff30, 0xff3f) AM_DEVREADWRITE("custom", gameboy_sound_device, wave_r, wave_w) /* wave ram */ - AM_RANGE(0xff40, 0xff46) AM_READWRITE(megaduck_sound_r2, megaduck_sound_w2) /* sound controller pt2 */ - AM_RANGE(0xff47, 0xff7f) AM_NOP /* unused */ - AM_RANGE(0xff80, 0xfffe) AM_RAM /* high RAM */ - AM_RANGE(0xffff, 0xffff) AM_READWRITE(gb_ie_r, gb_ie_w) /* interrupt enable register */ -ADDRESS_MAP_END - -static GFXDECODE_START( gb ) -GFXDECODE_END - -static INPUT_PORTS_START( gameboy ) - PORT_START("INPUTS") - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_NAME("Left") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_NAME("Right") - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_NAME("Up") - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_NAME("Down") - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("Button A") - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("Button B") - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START) PORT_NAME("Start") - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_SELECT) PORT_NAME("Select") - - PORT_START("SKIP_CHECK") - PORT_CONFNAME( 0x01, 0x00, "[HACK] Skip BIOS Logo check" ) - PORT_CONFSETTING( 0x00, DEF_STR( Off ) ) - PORT_CONFSETTING( 0x01, DEF_STR( On ) ) - -INPUT_PORTS_END - -static SLOT_INTERFACE_START(gb_cart) - SLOT_INTERFACE_INTERNAL("rom", GB_STD_ROM) - SLOT_INTERFACE_INTERNAL("rom_mbc1", GB_ROM_MBC1) - SLOT_INTERFACE_INTERNAL("rom_mbc1col", GB_ROM_MBC1) - SLOT_INTERFACE_INTERNAL("rom_mbc2", GB_ROM_MBC2) - SLOT_INTERFACE_INTERNAL("rom_mbc3", GB_ROM_MBC3) - SLOT_INTERFACE_INTERNAL("rom_huc1", GB_ROM_MBC3) - SLOT_INTERFACE_INTERNAL("rom_huc3", GB_ROM_MBC3) - SLOT_INTERFACE_INTERNAL("rom_mbc5", GB_ROM_MBC5) - SLOT_INTERFACE_INTERNAL("rom_mbc6", GB_ROM_MBC6) - SLOT_INTERFACE_INTERNAL("rom_mbc7", GB_ROM_MBC7) - SLOT_INTERFACE_INTERNAL("rom_tama5", GB_ROM_TAMA5) - SLOT_INTERFACE_INTERNAL("rom_mmm01", GB_ROM_MMM01) - SLOT_INTERFACE_INTERNAL("rom_m161_m12",GB_ROM_M161_M12) - SLOT_INTERFACE_INTERNAL("rom_sachen1", GB_ROM_SACHEN1) - SLOT_INTERFACE_INTERNAL("rom_sachen2", GB_ROM_SACHEN2) - SLOT_INTERFACE_INTERNAL("rom_wisdom", GB_ROM_WISDOM) - SLOT_INTERFACE_INTERNAL("rom_yong", GB_ROM_YONG) - SLOT_INTERFACE_INTERNAL("rom_lasama", GB_ROM_LASAMA) - SLOT_INTERFACE_INTERNAL("rom_atvrac", GB_ROM_ATVRAC) - SLOT_INTERFACE_INTERNAL("rom_camera", GB_STD_ROM) - SLOT_INTERFACE_INTERNAL("rom_188in1", GB_ROM_188IN1) - SLOT_INTERFACE_INTERNAL("rom_sintax", GB_ROM_SINTAX) - SLOT_INTERFACE_INTERNAL("rom_chong", GB_ROM_CHONGWU) - SLOT_INTERFACE_INTERNAL("rom_licheng", GB_ROM_LICHENG) - SLOT_INTERFACE_INTERNAL("rom_digimon", GB_ROM_DIGIMON) - SLOT_INTERFACE_INTERNAL("rom_rock8", GB_ROM_ROCKMAN8) - SLOT_INTERFACE_INTERNAL("rom_sm3sp", GB_ROM_SM3SP) -// SLOT_INTERFACE_INTERNAL("rom_dkong5", GB_ROM_DKONG5) -// SLOT_INTERFACE_INTERNAL("rom_unk01", GB_ROM_UNK01) -SLOT_INTERFACE_END - -static SLOT_INTERFACE_START(megaduck_cart) - SLOT_INTERFACE_INTERNAL("rom", MEGADUCK_ROM) -SLOT_INTERFACE_END - - - -static const unsigned char palette_gb[] = -{ - /* Simple black and white palette */ - /* 0xFF,0xFF,0xFF, - 0xB0,0xB0,0xB0, - 0x60,0x60,0x60, - 0x00,0x00,0x00 */ - - /* Possibly needs a little more green in it */ - 0xFF,0xFB,0x87, /* Background */ - 0xB1,0xAE,0x4E, /* Light */ - 0x84,0x80,0x4E, /* Medium */ - 0x4E,0x4E,0x4E, /* Dark */ - - /* Palette for Game Boy Pocket/Light */ - 0xC4,0xCF,0xA1, /* Background */ - 0x8B,0x95,0x6D, /* Light */ - 0x6B,0x73,0x53, /* Medium */ - 0x41,0x41,0x41, /* Dark */ -}; - -static const unsigned char palette_megaduck[] = { - 0x6B, 0xA6, 0x4A, 0x43, 0x7A, 0x63, 0x25, 0x59, 0x55, 0x12, 0x42, 0x4C -}; - -/* Initialise the palettes */ -PALETTE_INIT_MEMBER(gb_state, gb) -{ - for (int i = 0; i < 4; i++) - palette.set_pen_color(i, palette_gb[i * 3 + 0], palette_gb[i * 3 + 1], palette_gb[i * 3 + 2]); -} - -PALETTE_INIT_MEMBER(gb_state, gbp) -{ - for (int i = 0; i < 4; i++) - palette.set_pen_color(i, palette_gb[(i + 4) * 3 + 0], palette_gb[(i + 4) * 3 + 1], palette_gb[(i + 4) * 3 + 2]); -} - -PALETTE_INIT_MEMBER(gb_state, sgb) -{ - int r, g, b; - - for (int i = 0; i < 32768; i++) - { - r = (i & 0x1F) << 3; - g = ((i >> 5) & 0x1F) << 3; - b = ((i >> 10) & 0x1F) << 3; - palette.set_pen_color(i, r, g, b); - } -} - -PALETTE_INIT_MEMBER(gb_state, gbc) -{ - int r, g, b; - - for (int i = 0; i < 32768; i++) - { - r = (i & 0x1F) << 3; - g = ((i >> 5) & 0x1F) << 3; - b = ((i >> 10) & 0x1F) << 3; - palette.set_pen_color(i, r, g, b); - } -} - -PALETTE_INIT_MEMBER(megaduck_state, megaduck) -{ - for (int i = 0; i < 4; i++) - palette.set_pen_color(i, palette_megaduck[i * 3 + 0], palette_megaduck[i * 3 + 1], palette_megaduck[i * 3 + 2]); -} - - -static MACHINE_CONFIG_START( gameboy, gb_state ) - - /* basic machine hardware */ - MCFG_CPU_ADD("maincpu", LR35902, XTAL_4_194304Mhz) - MCFG_CPU_PROGRAM_MAP(gameboy_map) - MCFG_LR35902_TIMER_CB( WRITE8( gb_state, gb_timer_callback ) ) - MCFG_LR35902_HALT_BUG - - /* video hardware */ - MCFG_SCREEN_ADD("screen", LCD) - MCFG_SCREEN_REFRESH_RATE(DMG_FRAMES_PER_SECOND) - MCFG_SCREEN_VBLANK_TIME(0) - MCFG_SCREEN_UPDATE_DEVICE("lcd", gb_lcd_device, screen_update) - MCFG_SCREEN_PALETTE("palette") - - MCFG_DEFAULT_LAYOUT(layout_lcd) -// MCFG_SCREEN_SIZE(20*8, 18*8) - MCFG_SCREEN_SIZE( 458, 154 ) - MCFG_SCREEN_VISIBLE_AREA(0*8, 20*8-1, 0*8, 18*8-1) - - MCFG_GFXDECODE_ADD("gfxdecode", "palette", gb) - MCFG_PALETTE_ADD("palette", 4) - MCFG_PALETTE_INIT_OWNER(gb_state,gb) - - MCFG_GB_LCD_DMG_ADD("lcd") - - /* sound hardware */ - MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker") - MCFG_SOUND_ADD("custom", GAMEBOY, 0) - MCFG_SOUND_ROUTE(0, "lspeaker", 0.50) - MCFG_SOUND_ROUTE(1, "rspeaker", 0.50) - - /* cartslot */ - MCFG_GB_CARTRIDGE_ADD("gbslot", gb_cart, NULL) - - MCFG_SOFTWARE_LIST_ADD("cart_list","gameboy") - MCFG_SOFTWARE_LIST_COMPATIBLE_ADD("gbc_list","gbcolor") -MACHINE_CONFIG_END - -static MACHINE_CONFIG_DERIVED( supergb, gameboy ) - - /* basic machine hardware */ - MCFG_CPU_REPLACE("maincpu", LR35902, 4295454) /* 4.295454 MHz, derived from SNES xtal */ - MCFG_CPU_PROGRAM_MAP(sgb_map) - - MCFG_CPU_MODIFY("maincpu") - MCFG_LR35902_TIMER_CB( WRITE8(gb_state, gb_timer_callback ) ) - MCFG_LR35902_HALT_BUG - - MCFG_MACHINE_START_OVERRIDE(gb_state, sgb) - MCFG_MACHINE_RESET_OVERRIDE(gb_state, sgb) - - /* video hardware */ - MCFG_DEFAULT_LAYOUT(layout_horizont) /* runs on a TV, not an LCD */ - - MCFG_SCREEN_MODIFY("screen") - MCFG_SCREEN_SIZE(32*8, 28*8) - MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 28*8-1) - - MCFG_PALETTE_MODIFY("palette") - MCFG_PALETTE_ENTRIES(32768) - MCFG_PALETTE_INIT_OWNER(gb_state,sgb) - - MCFG_DEVICE_REMOVE("lcd") - MCFG_GB_LCD_SGB_ADD("lcd") -MACHINE_CONFIG_END - -static MACHINE_CONFIG_DERIVED( supergb2, gameboy ) - /* basic machine hardware */ - MCFG_CPU_MODIFY("maincpu") - MCFG_CPU_PROGRAM_MAP(sgb_map) - - MCFG_CPU_MODIFY("maincpu") - MCFG_LR35902_TIMER_CB( WRITE8(gb_state, gb_timer_callback ) ) - MCFG_LR35902_HALT_BUG - - MCFG_MACHINE_START_OVERRIDE(gb_state, sgb) - MCFG_MACHINE_RESET_OVERRIDE(gb_state, sgb) - - /* video hardware */ - MCFG_DEFAULT_LAYOUT(layout_horizont) /* runs on a TV, not an LCD */ - - MCFG_SCREEN_MODIFY("screen") - MCFG_SCREEN_SIZE(32*8, 28*8) - MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 28*8-1) - - MCFG_PALETTE_MODIFY("palette") - MCFG_PALETTE_ENTRIES(32768) - MCFG_PALETTE_INIT_OWNER(gb_state,sgb) - - MCFG_DEVICE_REMOVE("lcd") - MCFG_GB_LCD_SGB_ADD("lcd") -MACHINE_CONFIG_END - -static MACHINE_CONFIG_DERIVED( gbpocket, gameboy ) - - /* video hardware */ - MCFG_PALETTE_MODIFY("palette") - MCFG_PALETTE_INIT_OWNER(gb_state,gbp) - - MCFG_DEVICE_REMOVE("lcd") - MCFG_GB_LCD_MGB_ADD("lcd") -MACHINE_CONFIG_END - -static MACHINE_CONFIG_START( gbcolor, gb_state ) - - /* basic machine hardware */ - MCFG_CPU_ADD("maincpu", LR35902, XTAL_4_194304Mhz) // todo XTAL_8_388MHz - MCFG_CPU_PROGRAM_MAP(gbc_map) - MCFG_LR35902_TIMER_CB( WRITE8(gb_state, gb_timer_callback ) ) - - MCFG_MACHINE_START_OVERRIDE(gb_state,gbc) - MCFG_MACHINE_RESET_OVERRIDE(gb_state,gbc) - - /* video hardware */ - MCFG_SCREEN_ADD("screen", LCD) - MCFG_SCREEN_REFRESH_RATE(DMG_FRAMES_PER_SECOND) - MCFG_SCREEN_VBLANK_TIME(0) - MCFG_SCREEN_UPDATE_DEVICE("lcd", gb_lcd_device, screen_update) - MCFG_SCREEN_PALETTE("palette") - - MCFG_DEFAULT_LAYOUT(layout_lcd) -// MCFG_SCREEN_SIZE(20*8, 18*8) - MCFG_SCREEN_SIZE( 458, 154 ) - MCFG_SCREEN_VISIBLE_AREA(0*8, 20*8-1, 0*8, 18*8-1) - - MCFG_GFXDECODE_ADD("gfxdecode", "palette", gb) - - MCFG_PALETTE_ADD("palette", 32768) - MCFG_PALETTE_INIT_OWNER(gb_state,gbc) - - MCFG_GB_LCD_CGB_ADD("lcd") - - /* sound hardware */ - MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker") - MCFG_SOUND_ADD("custom", GAMEBOY, 0) - MCFG_SOUND_ROUTE(0, "lspeaker", 0.50) - MCFG_SOUND_ROUTE(1, "rspeaker", 0.50) - - /* internal ram */ - MCFG_RAM_ADD(RAM_TAG) - MCFG_RAM_DEFAULT_SIZE("48K") /* 2 pages of 8KB VRAM, 8 pages of 4KB RAM */ - - /* cartslot */ - MCFG_GB_CARTRIDGE_ADD("gbslot", gb_cart, NULL) - - MCFG_SOFTWARE_LIST_ADD("cart_list","gbcolor") - MCFG_SOFTWARE_LIST_COMPATIBLE_ADD("gb_list","gameboy") -MACHINE_CONFIG_END - -static MACHINE_CONFIG_START( megaduck, megaduck_state ) - - /* basic machine hardware */ - MCFG_CPU_ADD("maincpu", LR35902, 4194304) /* 4.194304 MHz */ - MCFG_CPU_PROGRAM_MAP(megaduck_map) - MCFG_LR35902_TIMER_CB( WRITE8(gb_state, gb_timer_callback ) ) - MCFG_LR35902_HALT_BUG - - /* video hardware */ - MCFG_SCREEN_ADD("screen", LCD) - MCFG_SCREEN_REFRESH_RATE(DMG_FRAMES_PER_SECOND) - MCFG_SCREEN_VBLANK_TIME(0) - MCFG_SCREEN_PALETTE("palette") - - MCFG_MACHINE_START_OVERRIDE(megaduck_state, megaduck) - MCFG_MACHINE_RESET_OVERRIDE(megaduck_state, megaduck) - - MCFG_SCREEN_UPDATE_DEVICE("lcd", gb_lcd_device, screen_update) - MCFG_SCREEN_SIZE(20*8, 18*8) - MCFG_SCREEN_VISIBLE_AREA(0*8, 20*8-1, 0*8, 18*8-1) - - MCFG_DEFAULT_LAYOUT(layout_lcd) - MCFG_GFXDECODE_ADD("gfxdecode", "palette", gb) - - MCFG_PALETTE_ADD("palette", 4) - MCFG_PALETTE_INIT_OWNER(megaduck_state,megaduck) - - MCFG_GB_LCD_DMG_ADD("lcd") - - /* sound hardware */ - MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker") - MCFG_SOUND_ADD("custom", GAMEBOY, 0) - MCFG_SOUND_ROUTE(0, "lspeaker", 0.50) - MCFG_SOUND_ROUTE(1, "rspeaker", 0.50) - - /* cartslot */ - MCFG_MEGADUCK_CARTRIDGE_ADD("duckslot", megaduck_cart, NULL) - MCFG_SOFTWARE_LIST_ADD("cart_list", "megaduck") -MACHINE_CONFIG_END - -/*************************************************************************** - - Game driver(s) - -***************************************************************************/ - -ROM_START( gameboy ) - ROM_REGION( 0x0100, "maincpu", 0 ) - ROM_LOAD( "dmg_boot.bin", 0x0000, 0x0100, CRC(59c8598e) SHA1(4ed31ec6b0b175bb109c0eb5fd3d193da823339f) ) -ROM_END - -ROM_START( supergb ) - ROM_REGION( 0x0100, "maincpu", 0 ) - ROM_LOAD( "sgb_boot.bin", 0x0000, 0x0100, CRC(ec8a83b9) SHA1(aa2f50a77dfb4823da96ba99309085a3c6278515) ) -ROM_END - -ROM_START( supergb2 ) - ROM_REGION( 0x0100, "maincpu", 0 ) - ROM_LOAD( "sgb2_boot.bin", 0x0000, 0x0100, CRC(53d0dd63) SHA1(93407ea10d2f30ab96a314d8eca44fe160aea734) ) -ROM_END - -ROM_START( gbpocket ) - ROM_REGION( 0x0100, "maincpu", 0 ) - ROM_LOAD( "mgb_boot.bin", 0x0000, 0x0100, CRC(e6920754) SHA1(4e68f9da03c310e84c523654b9026e51f26ce7f0) ) -ROM_END - -ROM_START( gbcolor ) - ROM_REGION( 0x800, "maincpu", 0 ) - ROM_LOAD( "gbc_boot.1", 0x0000, 0x0100, CRC(779ea374) SHA1(e4b40c9fd593a97a1618cfb2696f290cf9596a62) ) /* Bootstrap code part 1 */ - ROM_LOAD( "gbc_boot.2", 0x0100, 0x0700, CRC(f741807d) SHA1(f943b1e0b640cf1d371e1d8f0ada69af03ebb396) ) /* Bootstrap code part 2 */ -ROM_END - - -ROM_START( megaduck ) - ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) -ROM_END - -/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */ -CONS( 1990, gameboy, 0, 0, gameboy, gameboy, driver_device, 0, "Nintendo", "Game Boy", MACHINE_SUPPORTS_SAVE ) -CONS( 1994, supergb, gameboy, 0, supergb, gameboy, driver_device, 0, "Nintendo", "Super Game Boy", MACHINE_SUPPORTS_SAVE ) -CONS( 1998, supergb2, gameboy, 0, supergb2, gameboy, driver_device, 0, "Nintendo", "Super Game Boy 2", MACHINE_SUPPORTS_SAVE ) -CONS( 1996, gbpocket, gameboy, 0, gbpocket, gameboy, driver_device, 0, "Nintendo", "Game Boy Pocket", MACHINE_SUPPORTS_SAVE ) -CONS( 1998, gbcolor, 0, 0, gbcolor, gameboy, driver_device, 0, "Nintendo", "Game Boy Color", MACHINE_IMPERFECT_GRAPHICS | MACHINE_SUPPORTS_SAVE ) - -// Sound is not 100% yet, it generates some sounds which could be ok. Since we're lacking a real system there's no way to verify. -CONS( 1993, megaduck, 0, 0, megaduck, gameboy, driver_device, 0, "Welback Holdings (Timlex International) / Creatronic / Videojet / Cougar USA", "Mega Duck / Cougar Boy", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE ) |