// license:BSD-3-Clause // copyright-holders:Tony La Porta, hap /**************************************************************************\ * Texas Instruments TMS320x25 DSP Disassembler * * * * Copyright Tony La Porta * * To be used with TMS320x25 DSP Emulator engine. * * Written for the MAME project. * * * * Many thanks to those involved in the i8039 Disassembler * * as the structure here was borrowed from it. * * * * Note : This is a word based microcontroller, with addressing * * architecture based on the Harvard addressing scheme. * * * * * * A Memory Address * * B Opcode Address Argument (Requires next opcode read) * * C Compare mode * * D Immediate byte load * * K Immediate bit load * * W Immediate word load * * M AR[x] register modification type (for indirect addressing) * * N ARP register to change ARP pointer to (for indirect addressing) * * P I/O port address number * * R AR[R] register to use * * S Shift ALU left * * T Shift ALU left (Hex) / Nibble data * * X Don't care bit * * * \**************************************************************************/ #ifndef MAME_CPU_TMS32025_32025DSM_H #define MAME_CPU_TMS32025_32025DSM_H #pragma once class tms32025_disassembler : public util::disasm_interface { public: tms32025_disassembler(); virtual ~tms32025_disassembler() = default; virtual u32 opcode_alignment() const override; virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms) override; private: struct TMS32025Opcode { u16 mask; /* instruction mask */ u16 bits; /* constant bits */ u16 extcode; /* value that gets extension code */ const char *parse; /* how to parse bits */ const char *fmt; /* instruction format */ TMS32025Opcode(u16 m, u16 b, u16 e, const char *p, const char *f) : mask(m), bits(b), extcode(e), parse(p), fmt(f) {} }; static const char *const arith[8]; static const char *const nextar[16]; static const char *const cmpmode[4]; static const char *const TMS32025Formats[]; std::vector Op; }; #endif