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Diffstat (limited to 'src/devices/cpu/pps41/pps41base.h')
-rw-r--r-- | src/devices/cpu/pps41/pps41base.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/devices/cpu/pps41/pps41base.h b/src/devices/cpu/pps41/pps41base.h new file mode 100644 index 00000000000..b8b42a44a78 --- /dev/null +++ b/src/devices/cpu/pps41/pps41base.h @@ -0,0 +1,94 @@ +// license:BSD-3-Clause +// copyright-holders:hap +/* + + Rockwell PPS-4/1 MCU cores + +*/ + +#ifndef MAME_CPU_PPS41_PPS41BASE_H +#define MAME_CPU_PPS41_PPS41BASE_H + +#pragma once + +#include "machine/pla.h" + + +class pps41_base_device : public cpu_device +{ +public: + // configuration helpers + // I/O ports: + + //.. + + // set MCU mask options: + + //.. + +protected: + // construction/destruction + pps41_base_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data); + + // device-level overrides + virtual void device_start() override; + virtual void device_reset() override; + + // device_execute_interface overrides + virtual u32 execute_min_cycles() const noexcept override { return 1; } + virtual u32 execute_max_cycles() const noexcept override { return 2; } + virtual void execute_run() override; + virtual void execute_one() = 0; + + // device_memory_interface overrides + virtual space_config_vector memory_space_config() const override; + + address_space_config m_program_config; + address_space_config m_data_config; + address_space *m_program; + address_space *m_data; + + int m_icount; + + // fixed settings or mask options + int m_prgwidth; // ROM/RAM address size + int m_datawidth; // " + u16 m_prgmask; // " + u16 m_datamask; // " + + optional_device<pla_device> m_opla; // segment output PLA + + // i/o handlers + //.. + + // internal state, regs + u16 m_pc; + u16 m_prev_pc; + u8 m_op; + u8 m_prev_op; + u8 m_prev2_op; + int m_stack_levels; + u16 m_stack[2]; // max 2 + + u8 m_a; + u8 m_b; + u8 m_prev_b; + u8 m_prev2_b; + u8 m_ram_addr; + bool m_ram_delay; + bool m_sag; + int m_c; + int m_prev_c; + int m_c_in; + bool m_c_delay; + bool m_skip; + int m_skip_count; + + // misc handlers + virtual bool op_is_prefix(u8 op) = 0; + void cycle(); + void increment_pc(); +}; + + +#endif // MAME_CPU_PPS41_PPS41BASE_H |