// license:BSD-3-Clause // copyright-holders:Curt Coder, hap /********************************************************************** PLA (Programmable Logic Array) emulation **********************************************************************/ #ifndef MAME_MACHINE_PLA_H #define MAME_MACHINE_PLA_H #pragma once ///************************************************************************* // INTERFACE CONFIGURATION MACROS ///************************************************************************* #define MCFG_PLA_ADD(tag, inputs, outputs, terms) \ MCFG_DEVICE_ADD((tag), PLA, 0) \ downcast(*device).set_num_inputs((inputs)); \ downcast(*device).set_num_outputs((outputs)); \ downcast(*device).set_num_terms((terms)); #define MCFG_PLA_INPUTMASK(mask) \ downcast(*device).set_inputmask((mask)); #define MCFG_PLA_FILEFORMAT(format) \ downcast(*device).set_format((pla_device::FMT::format)); // macros for known (and used) devices // 82S100, 82S101, PLS100, PLS101 // 16x48x8 PLA, 28-pin: /* _____ _____ FE 1 |* \_/ | 28 Vcc I7 2 | | 27 I8 I6 3 | | 26 I9 I5 4 | | 25 I10 I4 5 | | 24 I11 I3 6 | 82S100 | 23 I12 I2 7 | 82S101 | 22 I13 I1 8 | PLS100 | 21 I14 I0 9 | PLS101 | 20 I15 F7 10 | | 19 _CE F6 11 | | 18 F0 F5 12 | | 17 F1 F4 13 | | 16 F2 GND 14 |_____________| 15 F3 */ #define MCFG_PLS100_ADD(tag) \ MCFG_PLA_ADD((tag), 16, 8, 48) // MOS 8721 PLA // TODO: actual number of terms is unknown #define MCFG_MOS8721_ADD(tag) \ MCFG_PLA_ADD((tag), 27, 18, 379) ///************************************************************************* // TYPE DEFINITIONS ///************************************************************************* // ======================> pla_device class pla_device : public device_t { public: enum class FMT { JEDBIN = 0, BERKELEY }; // construction/destruction pla_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); // configuration helpers void set_num_inputs(uint32_t i) { m_inputs = i; } void set_num_outputs(uint32_t o) { m_outputs = o; } void set_num_terms(uint32_t t) { m_terms = t; } void set_inputmask(uint32_t mask) { m_input_mask = mask; } // uint32_t! void set_format(FMT format) { m_format = format; } uint32_t inputs() { return m_inputs; } uint32_t outputs() { return m_outputs; } uint32_t read(uint32_t input); protected: // device-level overrides virtual void device_start() override; private: static constexpr unsigned MAX_TERMS = 512; static constexpr unsigned MAX_CACHE_BITS = 20; static constexpr unsigned CACHE2_SIZE = 8; void parse_fusemap(); required_memory_region m_region; FMT m_format; uint32_t m_inputs; uint32_t m_outputs; uint32_t m_terms; uint64_t m_input_mask; uint64_t m_xor; int m_cache_size; std::vector m_cache; uint64_t m_cache2[CACHE2_SIZE]; uint8_t m_cache2_ptr; struct term { uint64_t and_mask; uint64_t or_mask; } m_term[MAX_TERMS]; }; // device type definition DECLARE_DEVICE_TYPE(PLA, pla_device) #endif // MAME_MACHINE_PLA_H