diff options
Diffstat (limited to 'src/devices/bus/samcoupe/expansion/onemeg.h')
-rw-r--r-- | src/devices/bus/samcoupe/expansion/onemeg.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/devices/bus/samcoupe/expansion/onemeg.h b/src/devices/bus/samcoupe/expansion/onemeg.h new file mode 100644 index 00000000000..40b60accf82 --- /dev/null +++ b/src/devices/bus/samcoupe/expansion/onemeg.h @@ -0,0 +1,52 @@ +// license: GPL-2.0+ +// copyright-holders: Dirk Best +/*************************************************************************** + + 1 Mb Interface for SAM Coupe + +***************************************************************************/ + +#ifndef MAME_BUS_SAMCOUPE_EXPANSION_ONEMEG_H +#define MAME_BUS_SAMCOUPE_EXPANSION_ONEMEG_H + +#pragma once + +#include "expansion.h" + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> sam_onemeg_device + +class sam_onemeg_device : public device_t, public device_samcoupe_expansion_interface +{ +public: + // construction/destruction + sam_onemeg_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + + // from host + virtual void xmem_w(int state) override; + + virtual uint8_t mreq_r(offs_t offset) override; + virtual void mreq_w(offs_t offset, uint8_t data) override; + virtual void iorq_w(offs_t offset, uint8_t data) override; + +protected: + virtual ioport_constructor device_input_ports() const override; + virtual void device_start() override; + +private: + required_ioport m_dip; + + int m_xmem; + uint8_t m_expage[2]; + + std::unique_ptr<uint8_t[]> m_ram; +}; + +// device type definition +DECLARE_DEVICE_TYPE(SAM_ONEMEG, sam_onemeg_device) + +#endif // MAME_BUS_SAMCOUPE_EXPANSION_ONEMEG_H |