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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/***************************************************************************
57002dsm.cpp
TMS57002 "DASP" emulator.
***************************************************************************/
#include "emu.h"
#include "57002dsm.h"
tms57002_disassembler::tms57002_disassembler()
{
}
std::string tms57002_disassembler::get_memadr(u32 opcode, char type)
{
std::string buf;
if (((opcode & 0x400) && (type == 'c')) || (!(opcode & 0x400) && (type == 'd')))
{
if (opcode & 0x100)
buf = util::string_format("%c(%02x)", type, opcode & 0xff);
else if (opcode & 0x80)
buf = util::string_format("%c*+", type);
else
buf = util::string_format("%c*", type);
}
else if (opcode & 0x200)
buf = util::string_format("%c*+", type);
else
buf = util::string_format("%c*", type);
return buf;
}
u32 tms57002_disassembler::opcode_alignment() const
{
return 1;
}
offs_t tms57002_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms)
{
std::streampos original_pos = stream.tellp();
u32 opcode = opcodes.r32(pc);
u8 fa = opcode >> 18;
if (fa == 0x3f)
{
switch ((opcode >> 11) & 0x7f) // category 3
{
#define DASM3
#include "cpu/tms57002/tms57002d.hxx"
#undef DASM3
default:
util::stream_format(stream, "unk c3 %02x", (opcode >> 11) & 0x7f);
break;
}
}
else
{
switch (fa) // category 1
{
case 0x00:
break;
#define DASM1
#include "cpu/tms57002/tms57002d.hxx"
#undef DASM1
default:
util::stream_format(stream, "unk c1 %02x", fa);
break;
}
bool next_is_nop = ((opcode >> 11) & 0x7f) == 0x00;
if (!next_is_nop && stream.tellp() != original_pos)
stream << " ; ";
switch ((opcode >> 11) & 0x7f) // category 2
{
case 0x00:
if (stream.tellp() == original_pos)
util::stream_format(stream, "nop");
break;
#define DASM2
#include "cpu/tms57002/tms57002d.hxx"
#undef DASM2
default:
util::stream_format(stream, "unk c2 %02x", (opcode >> 11) & 0x7f);
break;
}
}
return 1;
}
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