diff options
Diffstat (limited to 'src/devices/bus/msx_slot/ram_mm.h')
-rw-r--r-- | src/devices/bus/msx_slot/ram_mm.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/devices/bus/msx_slot/ram_mm.h b/src/devices/bus/msx_slot/ram_mm.h new file mode 100644 index 00000000000..59eb7f18e89 --- /dev/null +++ b/src/devices/bus/msx_slot/ram_mm.h @@ -0,0 +1,45 @@ +// license:BSD-3-Clause +// copyright-holders:Wilbert Pol +#ifndef __MSX_SLOT_RAM_MM_H +#define __MSX_SLOT_RAM_MM_H + +#include "slot.h" + +#define MCFG_MSX_SLOT_RAM_MM_ADD(_tag, _total_size) \ + MCFG_MSX_INTERNAL_SLOT_ADD(_tag, MSX_SLOT_RAM_MM, 0, 4) \ + msx_slot_ram_mm_device::set_total_size(*device, _total_size); + +#define MCFG_MSX_SLOT_RAMM_SET_RAMIO_BITS(_ramio_set_bits) \ + msx_slot_ram_mm_device::set_ramio_set_bits(*device, _ramio_set_bits); + +class msx_slot_ram_mm_device : public device_t + , public msx_internal_slot_interface +{ +public: + msx_slot_ram_mm_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + static void set_total_size(device_t &device, UINT32 total_size) { dynamic_cast<msx_slot_ram_mm_device &>(device).m_total_size = total_size; } + static void set_ramio_set_bits(device_t &device, UINT8 ramio_set_bits) { dynamic_cast<msx_slot_ram_mm_device &>(device).m_ramio_set_bits = ramio_set_bits; } + + virtual void device_start(); + + virtual DECLARE_READ8_MEMBER(read); + virtual DECLARE_WRITE8_MEMBER(write); + + DECLARE_READ8_MEMBER(read_mapper_bank); + DECLARE_WRITE8_MEMBER(write_mapper_bank); + + void restore_banks(); + +private: + std::vector<UINT8> m_ram; + UINT32 m_total_size; + UINT8 m_bank_mask; + UINT8 m_bank_selected[4]; + UINT8 *m_bank_base[4]; + UINT8 m_ramio_set_bits; +}; + +extern const device_type MSX_SLOT_RAM_MM; + +#endif |