diff options
Diffstat (limited to 'src/devices/bus/bbc/internal/peartree.h')
-rw-r--r-- | src/devices/bus/bbc/internal/peartree.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/internal/peartree.h b/src/devices/bus/bbc/internal/peartree.h new file mode 100644 index 00000000000..9f9ed683396 --- /dev/null +++ b/src/devices/bus/bbc/internal/peartree.h @@ -0,0 +1,116 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Peartree MRxx00 ROM/RAM Boards + + http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Peartree_ROMExpansion.html + +**********************************************************************/ + + +#ifndef MAME_BUS_BBC_INTERNAL_PEARTREE_H +#define MAME_BUS_BBC_INTERNAL_PEARTREE_H + +#include "internal.h" + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class bbc_mr3000_device : + public device_t, + public device_bbc_internal_interface +{ +public: + // construction/destruction + bbc_mr3000_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + bbc_mr3000_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); + + // device-level overrides + virtual void device_start() override; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + + optional_device_array<bbc_romslot_device, 16> m_rom; + + virtual bool overrides_rom() override { return true; } + virtual void romsel_w(offs_t offset, uint8_t data) override { m_romsel = data & 0x0f; } + virtual uint8_t paged_r(offs_t offset) override; + virtual void paged_w(offs_t offset, uint8_t data) override; + + uint8_t m_romsel; +}; + + +class bbc_mr4200_device : public bbc_mr3000_device +{ +public: + // construction/destruction + bbc_mr4200_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + virtual ioport_constructor device_input_ports() const override; + + required_ioport m_wp; + + virtual void paged_w(offs_t offset, uint8_t data) override; +}; + + +class bbc_mr4300_device : + public device_t, + public device_bbc_internal_interface +{ +public: + // construction/destruction + bbc_mr4300_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + bbc_mr4300_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); + + // device-level overrides + virtual void device_start() override; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + virtual ioport_constructor device_input_ports() const override; + + optional_device_array<bbc_romslot_device, 16> m_rom; + required_ioport m_wp; + + virtual bool overrides_rom() override { return true; } + virtual void romsel_w(offs_t offset, uint8_t data) override { m_romsel = data & 0x0f; } + virtual uint8_t paged_r(offs_t offset) override; + virtual void paged_w(offs_t offset, uint8_t data) override; + + uint8_t m_romsel; +}; + + +class bbc_mr4800_device : public bbc_mr4300_device +{ +public: + // construction/destruction + bbc_mr4800_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(BBC_MR3000, bbc_mr3000_device); +DECLARE_DEVICE_TYPE(BBC_MR4200, bbc_mr4200_device); +DECLARE_DEVICE_TYPE(BBC_MR4300, bbc_mr4300_device); +DECLARE_DEVICE_TYPE(BBC_MR4800, bbc_mr4800_device); + + +#endif /* MAME_BUS_BBC_INTERNAL_PEARTREE_H */ |