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Diffstat (limited to 'src/devices/machine/applepic.h')
-rw-r--r-- | src/devices/machine/applepic.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/devices/machine/applepic.h b/src/devices/machine/applepic.h new file mode 100644 index 00000000000..1bd3a2983bb --- /dev/null +++ b/src/devices/machine/applepic.h @@ -0,0 +1,105 @@ +// license:BSD-3-Clause +// copyright-holders:AJR + +#ifndef MAME_DEVICES_MACHINE_APPLEPIC_H +#define MAME_DEVICES_MACHINE_APPLEPIC_H + +#pragma once + +#include "cpu/m6502/r65c02.h" + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> applepic_device + +class applepic_device : public device_t +{ +public: + // construction/destruction + applepic_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + + // callback configuration + auto prd_callback() { return m_prd_callback.bind(); } + auto pwr_callback() { return m_pwr_callback.bind(); } + auto hint_callback() { return m_hint_callback.bind(); } + auto gpout0_callback() { return m_gpout_callback[0].bind(); } + auto gpout1_callback() { return m_gpout_callback[1].bind(); } + + // host interface + u8 host_r(offs_t offset); + void host_w(offs_t offset, u8 data); + + // peripheral device requests + DECLARE_WRITE_LINE_MEMBER(pint_w); + DECLARE_WRITE_LINE_MEMBER(reqa_w); + DECLARE_WRITE_LINE_MEMBER(reqb_w); + +protected: + // device-level overrides + virtual void device_add_mconfig(machine_config &config) override; + virtual void device_resolve_objects() override; + virtual void device_start() override; + virtual void device_reset() override; + +private: + static const std::string_view s_interrupt_names[8]; + + struct dma_channel + { + u8 control; + u16 map; + u16 tc; + }; + + u8 timer_r(offs_t offset); + void timer_w(offs_t offset, u8 data); + void reset_timer_interrupt(); + u8 dma_channel_r(offs_t offset); + void dma_channel_w(offs_t offset, u8 data); + u8 scc_control_r(); + void scc_control_w(u8 data); + u8 io_control_r(); + void io_control_w(u8 data); + u8 timer_dpll_control_r(); + void timer_dpll_control_w(u8 data); + u8 int_mask_r(); + void int_mask_w(u8 data); + u8 int_reg_r(); + void int_reg_w(u8 data); + void set_interrupt(int which); + void reset_interrupt(int which); + u8 host_reg_r(); + void host_reg_w(u8 data); + u8 device_reg_r(offs_t offset); + void device_reg_w(offs_t offset, u8 data); + + void internal_map(address_map &map); + + // internal CPU + required_device<r65c02_device> m_iopcpu; + + // callbacks for peripheral and host + devcb_read8 m_prd_callback; + devcb_write8 m_pwr_callback; + devcb_write_line m_hint_callback; + devcb_write_line::array<2> m_gpout_callback; + + // internal state + u16 m_ram_address; + u8 m_status_reg; + u16 m_timer_counter; + u16 m_timer_latch; + dma_channel m_dma_channel[2]; + u8 m_scc_control; + u8 m_io_control; + u8 m_timer_dpll_control; + u8 m_int_mask; + u8 m_int_reg; +}; + +// device type declaration +DECLARE_DEVICE_TYPE(APPLEPIC, applepic_device) + +#endif // MAME_DEVICES_MACHINE_APPLEPIC_H |