diff options
Diffstat (limited to 'src/mess/machine/z88_rom.c')
-rw-r--r-- | src/mess/machine/z88_rom.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/mess/machine/z88_rom.c b/src/mess/machine/z88_rom.c new file mode 100644 index 00000000000..26970fd55a6 --- /dev/null +++ b/src/mess/machine/z88_rom.c @@ -0,0 +1,88 @@ +/*************************************************************************** + + z88_rom.c + + Z88 ROM cartridges emulation + +***************************************************************************/ + +#include "emu.h" +#include "z88_rom.h" + +/*************************************************************************** + IMPLEMENTATION +***************************************************************************/ + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type Z88_32K_ROM = &device_creator<z88_32k_rom_device>; +const device_type Z88_128K_ROM = &device_creator<z88_128k_rom_device>; +const device_type Z88_256K_ROM = &device_creator<z88_256k_rom_device>; + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// z88_32k_rom_device - constructor +//------------------------------------------------- + +z88_32k_rom_device::z88_32k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, Z88_32K_ROM, "Z88 32KB ROM", tag, owner, clock), + device_z88cart_interface( mconfig, *this ) +{ +} + +z88_32k_rom_device::z88_32k_rom_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, type, name, tag, owner, clock), + device_z88cart_interface( mconfig, *this ) +{ +} + +//------------------------------------------------- +// z88_128k_rom_device - constructor +//------------------------------------------------- + +z88_128k_rom_device::z88_128k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : z88_32k_rom_device(mconfig, Z88_128K_ROM, "Z88 128KB ROM", tag, owner, clock) +{ +} + +//------------------------------------------------- +// z88_256k_rom_device - constructor +//------------------------------------------------- + +z88_256k_rom_device::z88_256k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : z88_32k_rom_device(mconfig, Z88_256K_ROM, "Z88 256KB ROM", tag, owner, clock) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void z88_32k_rom_device::device_start() +{ + m_rom = machine().memory().region_alloc(tag(), get_cart_size(), 1, ENDIANNESS_LITTLE)->base(); +} + +/*------------------------------------------------- + get_cart_base +-------------------------------------------------*/ + +UINT8* z88_32k_rom_device::get_cart_base() +{ + return m_rom; +} + +/*------------------------------------------------- + read +-------------------------------------------------*/ + +READ8_MEMBER(z88_32k_rom_device::read) +{ + return m_rom[offset & (get_cart_size() - 1)]; +} + |