diff options
Diffstat (limited to 'src/devices/machine/am2910.h')
-rw-r--r-- | src/devices/machine/am2910.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/devices/machine/am2910.h b/src/devices/machine/am2910.h new file mode 100644 index 00000000000..6990944e572 --- /dev/null +++ b/src/devices/machine/am2910.h @@ -0,0 +1,83 @@ +// license:BSD-3-Clause +// copyright-holders:Ryan Holtz +/*************************************************************************** + + am2910.h + AMD Am2910 Microprogram Controller emulation + +***************************************************************************/ + +#ifndef MAME_MACHINE_AM2910_AM2910_H +#define MAME_MACHINE_AM2910_AM2910_H + +#pragma once + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> am2910_device + +class am2910_device : public device_t +{ +public: + // construction/destruction + am2910_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + + DECLARE_WRITE_LINE_MEMBER(cc_w); // !CC + DECLARE_WRITE_LINE_MEMBER(ccen_w); // !CCEN + DECLARE_WRITE_LINE_MEMBER(ci_w); // CI + DECLARE_WRITE_LINE_MEMBER(rld_w); // !RLD + DECLARE_WRITE_LINE_MEMBER(cp_w); // CP + void d_w(uint16_t data); + void i_w(uint8_t data); + + auto y() { return m_y.bind(); } + auto pl() { return m_pl.bind(); } + auto full() { return m_full.bind(); } + auto map() { return m_map.bind(); } + auto vect() { return m_vect.bind(); } + +protected: + // device-level overrides + virtual void device_start() override; + virtual void device_reset() override; + virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; + + static constexpr device_timer_id TIMER_CLOCK = 0; + + emu_timer *m_execute_timer; + + void execute(); + bool test_pass(); + void push(uint16_t value); + void pop(); + void update_source(); + + // internal state + uint16_t m_pc; + uint16_t m_r; + uint8_t m_sp; + uint16_t m_stack[5]; + + // inputs + int m_cc; + int m_ccen; + int m_ci; + int m_rld; + int m_cp; + uint16_t m_d; + uint8_t m_i; + + // outputs + devcb_write16 m_y; + devcb_write_line m_full; + devcb_write_line m_pl; + devcb_write_line m_map; + devcb_write_line m_vect; +}; + +// device type definition +DECLARE_DEVICE_TYPE(AM2910, am2910_device) + +#endif // MAME_MACHINE_AM2910_AM2910_H |