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// license:BSD-3-Clause
// copyright-holders:hap
/*
Sharp SM510 MCU family disassembler
*/
#include "emu.h"
#include "debugger.h"
#include "sm510.h"
// common lookup tables
enum e_mnemonics
{
mILL, mEXT,
mLB, mLBL, mSBM, mEXBLA, mINCB, mDECB,
mATPL, mRTN0, mRTN1, mTL, mTML, mTM, mT,
mEXC, mBDC, mEXCI, mEXCD, mLDA, mLAX, mPTW, mWR, mWS,
mKTA, mATBP, mATX, mATL, mATFC, mATR,
mADD, mADD11, mADX, mCOMA, mROT, mRC, mSC,
mTB, mTC, mTAM, mTMI, mTA0, mTABL, mTIS, mTAL, mTF1, mTF4,
mRM, mSM,
mPRE, mSME, mRME, mTMEL,
mSKIP, mCEND, mIDIV
};
static const char *const s_mnemonics[] =
{
"?", "",
"LB", "LBL", "SBM", "EXBLA", "INCB", "DECB",
"ATPL", "RTN0", "RTN1", "TL", "TML", "TM", "T",
"EXC", "BDC", "EXCI", "EXCD", "LDA", "LAX", "PTW", "WR", "WS",
"KTA", "ATBP", "ATX", "ATL", "ATFC", "ATR",
"ADD", "ADD11", "ADX", "COMA", "ROT", "RC", "SC",
"TB", "TC", "TAM", "TMI", "TA0", "TABL", "TIS", "TAL", "TF1", "TF4",
"RM", "SM",
"PRE", "SME", "RME", "TMEL",
"SKIP", "CEND", "IDIV"
};
// number of bits per opcode parameter, 8 or larger means 2-byte opcode
static const UINT8 s_bits[] =
{
0, 8,
4, 8, 0, 0, 0, 0,
0, 0, 0, 4+8, 2+8, 6, 6,
2, 0, 2, 2, 2, 4, 0, 0, 0,
0, 0, 0, 0, 0, 0,
0, 0, 4, 0, 0, 0, 0,
0, 0, 0, 2, 0, 0, 0, 0, 0, 0,
2, 2,
8, 0, 0, 0,
0, 0, 0
};
#define _OVER DASMFLAG_STEP_OVER
#define _OUT DASMFLAG_STEP_OUT
static const UINT32 s_flags[] =
{
0, 0,
0, 0, 0, 0, 0, 0,
0, _OUT, _OUT, 0, _OVER, _OVER, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0,
0, 0, 0, 0,
0, _OVER, 0
};
// next program counter in sequence (relative)
static const INT8 s_next_pc[0x40] =
{
32, -1 /* rollback */, -1, 30, 30, -3, -3, 28, 28, -5, -5, 26, 26, -7, -7, 24,
24, -9, -9, 22, 22, -11, -11, 20, 20, -13, -13, 18, 18, -15, -15, 16,
16, -17, -17, 14, 14, -19, -19, 12, 12, -21, -21, 10, 10, -23, -23, 8,
8, -25, -25, 6, 6, -27, -27, 4, 4, -29, -29, 2, 2, -31, -31, 0 /* gets stuck here */
};
// common disasm
static offs_t sm510_common_disasm(const UINT8 *lut_mnemonic, const UINT8 *lut_extended, char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram)
{
// get raw opcode
UINT8 op = oprom[0];
UINT8 instr = lut_mnemonic[op];
int len = 1;
int bits = s_bits[instr];
UINT8 mask = op & ((1 << (bits & 7)) - 1);
UINT16 param = mask;
if (bits >= 8)
{
// note: disasm view shows correct parameter, but raw view does not
// note2: oprom array negative index doesn't work either :(
param = oprom[s_next_pc[pc & 0x3f]];
len++;
}
// extended opcode
bool is_extended = (instr == mEXT);
if (is_extended)
instr = lut_extended[param];
// disassemble it
char *dst = buffer;
dst += sprintf(dst, "%-6s ", s_mnemonics[instr]);
if (bits > 0)
{
if (bits <= 4)
{
if (param < 10)
dst += sprintf(dst, "%d", param);
else
dst += sprintf(dst, "$%X", param);
}
else if (bits <= 8)
{
if (!is_extended)
dst += sprintf(dst, "$%02X", param);
}
else
{
UINT16 address = (param << 4 & 0xc00) | (mask << 6 & 0x3c0) | (param & 0x03f);
dst += sprintf(dst, "$%03X", address);
}
// show param offset
if (bits >= 8)
dst += sprintf(dst, " [$%03X]", pc + s_next_pc[pc & 0x3f]);
}
return len | s_flags[instr] | DASMFLAG_SUPPORTED;
}
// SM510 disasm
static const UINT8 sm510_mnemonic[0x100] =
{
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
mSKIP, mATBP, mSBM, mATPL, mRM, mRM, mRM, mRM, mADD, mADD11,mCOMA, mEXBLA,mSM, mSM, mSM, mSM, // 0
mEXC, mEXC, mEXC, mEXC, mEXCI, mEXCI, mEXCI, mEXCI, mLDA, mLDA, mLDA, mLDA, mEXCD, mEXCD, mEXCD, mEXCD, // 1
mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, // 2
mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, // 3 - note: $3A has synonym DC(decimal correct)
mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, // 4
0, mTB, mTC, mTAM, mTMI, mTMI, mTMI, mTMI, mTIS, mATL, mTA0, mTABL, 0, mCEND, mTAL, mLBL, // 5
mATFC, mATR, mWR, mWS, mINCB, mIDIV, mRC, mSC, mTF1, mTF4, mKTA, mROT, mDECB, mBDC, mRTN0, mRTN1, // 6
mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTML, mTML, mTML, mTML, // 7
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // 8
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // 9
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // A
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // B
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, // C
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, // D
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, // E
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM // F
};
CPU_DISASSEMBLE(sm510)
{
return sm510_common_disasm(sm510_mnemonic, NULL, buffer, pc, oprom, opram);
}
// SM511 disasm
static const UINT8 sm511_mnemonic[0x100] =
{
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
mROT, 0, mSBM, mATPL, mRM, mRM, mRM, mRM, mADD, mADD11,mCOMA, mEXBLA,mSM, mSM, mSM, mSM, // 0
mEXC, mEXC, mEXC, mEXC, mEXCI, mEXCI, mEXCI, mEXCI, mLDA, mLDA, mLDA, mLDA, mEXCD, mEXCD, mEXCD, mEXCD, // 1
mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, mLAX, // 2
mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, mADX, // 3
mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, mLB, // 4
mKTA, mTB, mTC, mTAM, mTMI, mTMI, mTMI, mTMI, mTIS, mATL, mTA0, mTABL, mATX, 0, mTAL, mLBL, // 5
mEXT, mPRE, mWR, mWS, mINCB, 0, mRC, mSC, mTML, mTML, mTML, mTML, mDECB, mPTW, mRTN0, mRTN1, // 6
mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, mTL, // 7
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // 8
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // 9
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // A
mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, mT, // B
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, // C
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, // D
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, // E
mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM, mTM // F
};
static const UINT8 sm511_extended[0x10] =
{
mRME, mSME, mTMEL, mATFC, mBDC, mATBP, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 60 3
};
CPU_DISASSEMBLE(sm511)
{
// create extended opcode table
UINT8 ext[0x100];
memset(ext, 0, 0x100);
memcpy(ext + 0x30, sm511_extended, 0x10);
return sm510_common_disasm(sm511_mnemonic, ext, buffer, pc, oprom, opram);
}
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