diff options
Diffstat (limited to 'src/mess/machine/vb_std.c')
-rw-r--r-- | src/mess/machine/vb_std.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/mess/machine/vb_std.c b/src/mess/machine/vb_std.c new file mode 100644 index 00000000000..029085271eb --- /dev/null +++ b/src/mess/machine/vb_std.c @@ -0,0 +1,63 @@ +/********************************************************************** + + VideoBrain Standard 2K/4K cartridge emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#include "vb_std.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type VB_STD = &device_creator<videobrain_standard_cartridge_device>; + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// videobrain_standard_cartridge_device - constructor +//------------------------------------------------- + +videobrain_standard_cartridge_device::videobrain_standard_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, VB_STD, "VideoBrain standard cartridge", tag, owner, clock), + device_videobrain_expansion_card_interface(mconfig, *this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void videobrain_standard_cartridge_device::device_start() +{ +} + + +//------------------------------------------------- +// videobrain_bo_r - cartridge data read +//------------------------------------------------- + +UINT8 videobrain_standard_cartridge_device::videobrain_bo_r(address_space &space, offs_t offset, int cs1, int cs2) +{ + UINT8 data = 0; + + if (!cs1) + { + data = m_rom[offset & m_rom_mask]; + } + else if (!cs2) + { + data = m_rom[offset & m_rom_mask]; + } + return data; +} |