diff options
Diffstat (limited to 'src/devices/cpu/s2650/2650dasm.cpp')
-rw-r--r-- | src/devices/cpu/s2650/2650dasm.cpp | 142 |
1 files changed, 57 insertions, 85 deletions
diff --git a/src/devices/cpu/s2650/2650dasm.cpp b/src/devices/cpu/s2650/2650dasm.cpp index 34b144532d2..a927ac4b759 100644 --- a/src/devices/cpu/s2650/2650dasm.cpp +++ b/src/devices/cpu/s2650/2650dasm.cpp @@ -12,32 +12,12 @@ #include "emu.h" #include "2650dasm.h" -/* handy table to build relative offsets from HR (holding register) */ -const int s2650_disassembler::rel[0x100] = { - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, - 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, - 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, - 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, - -64,-63,-62,-61,-60,-59,-58,-57,-56,-55,-54,-53,-52,-51,-50,-49, - -48,-47,-46,-45,-44,-43,-42,-41,-40,-39,-38,-37,-36,-35,-34,-33, - -32,-31,-30,-29,-28,-27,-26,-25,-24,-23,-22,-21,-20,-19,-18,-17, - -16,-15,-14,-13,-12,-11,-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, - 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, - 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, - 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, - -64,-63,-62,-61,-60,-59,-58,-57,-56,-55,-54,-53,-52,-51,-50,-49, - -48,-47,-46,-45,-44,-43,-42,-41,-40,-39,-38,-37,-36,-35,-34,-33, - -32,-31,-30,-29,-28,-27,-26,-25,-24,-23,-22,-21,-20,-19,-18,-17, - -16,-15,-14,-13,-12,-11,-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, -}; - std::string s2650_disassembler::SYM(int addr) { return util::string_format("$%04x", addr); } -/* format an immediate */ +// format an immediate std::string s2650_disassembler::IMM(offs_t pc, const data_buffer ¶ms) { return util::string_format("$%02x", params.r8(pc)); @@ -45,14 +25,14 @@ std::string s2650_disassembler::IMM(offs_t pc, const data_buffer ¶ms) const char s2650_disassembler::cc[4] = { 'z', 'p', 'm', 'a' }; -void s2650_disassembler::add(std::string &buf, std::string str) +void s2650_disassembler::add(std::string &buf, const std::string &str) { if(!buf.empty()) buf += '+'; buf += str; } -/* format an immediate for PSL */ +// format an immediate for PSL std::string s2650_disassembler::IMM_PSL(offs_t pc, const data_buffer ¶ms) { u8 v = params.r8(pc); @@ -68,23 +48,23 @@ std::string s2650_disassembler::IMM_PSL(offs_t pc, const data_buffer ¶ms) case 0x80: add(buff, "m"); break; case 0xc0: add(buff, "cc"); break; } - if (v & 0x20) /* inter digit carry */ + if (v & 0x20) // inter digit carry add(buff, "idc"); - if (v & 0x10) /* register select */ + if (v & 0x10) // register select add(buff, "rs"); - if (v & 0x08) /* with carry */ + if (v & 0x08) // with carry add(buff, "wc"); - if (v & 0x04) /* overflow */ + if (v & 0x04) // overflow add(buff, "ovf"); - if (v & 0x02) /* 2's complement comparisons */ + if (v & 0x02) // 2's complement comparisons add(buff, "com"); - if (v & 0x01) /* carry */ + if (v & 0x01) // carry add(buff, "c"); return buff; } } -/* format an immediate for PSU (processor status upper) */ +// format an immediate for PSU (processor status upper) std::string s2650_disassembler::IMM_PSU(offs_t pc, const data_buffer ¶ms) { int v = params.r8(pc); @@ -94,45 +74,45 @@ std::string s2650_disassembler::IMM_PSU(offs_t pc, const data_buffer ¶ms) } else { std::string buff; - if (v & 0x80) /* sense input */ + if (v & 0x80) // sense input add(buff, "si"); - if (v & 0x40) /* flag output */ + if (v & 0x40) // flag output add(buff, "fo"); - if (v & 0x20) /* interrupt inhibit */ + if (v & 0x20) // interrupt inhibit add(buff, "ii"); - if (v & 0x10) /* unused bit 4 */ + if (v & 0x10) // unused bit 4 add(buff, "4"); - if (v & 0x08) /* unused bit 3 */ + if (v & 0x08) // unused bit 3 add(buff, "3"); - if (v & 0x04) /* stack pointer bit 2 */ + if (v & 0x04) // stack pointer bit 2 add(buff, "sp2"); - if (v & 0x02) /* stack pointer bit 1 */ + if (v & 0x02) // stack pointer bit 1 add(buff, "sp1"); - if (v & 0x01) /* stack pointer bit 0 */ + if (v & 0x01) // stack pointer bit 0 add(buff, "sp0"); return buff; } } -/* format an relative address */ +// format an relative address std::string s2650_disassembler::REL(offs_t pc, const data_buffer ¶ms) { int o = params.r8(pc); - return util::string_format("%s%s", (o&0x80)?"*":"", SYM((pc&0x6000)+((pc+1+rel[o])&0x1fff))); + return util::string_format("%s%s", (o & 0x80) ? "*" : "", SYM((pc & 0x6000) + ((pc + 1 + util::sext(o, 7)) & 0x1fff))); } -/* format an relative address (implicit page 0) */ +// format an relative address (implicit page 0) std::string s2650_disassembler::REL0(offs_t pc, const data_buffer ¶ms) { int o = params.r8(pc); - return util::string_format("%s%s", (o&0x80)?"*":"", SYM((rel[o]) & 0x1fff)); + return util::string_format("%s%s", (o & 0x80) ? "*" : "", SYM(util::sext(o, 7) & 0x1fff)); } -/* format a destination register and an absolute address */ +// format a destination register and an absolute address std::string s2650_disassembler::ABS(int load, int r, offs_t pc, const data_buffer ¶ms) { int h = params.r8(pc); - int l = params.r8((pc&0x6000)+((pc+1)&0x1fff)); + int l = params.r8((pc & 0x6000) + ((pc + 1) & 0x1fff)); int a = (pc & 0x6000) + ((h & 0x1f) << 8) + l; if (m_config->get_z80_mnemonics_mode()) { @@ -174,11 +154,11 @@ std::string s2650_disassembler::ABS(int load, int r, offs_t pc, const data_buffe return ""; } -/* format an (branch) absolute address */ +// format an (branch) absolute address std::string s2650_disassembler::ADR(offs_t pc, const data_buffer ¶ms) { int h = params.r8(pc); - int l = params.r8((pc&0x6000)+((pc+1)&0x1fff)); + int l = params.r8((pc & 0x6000) + ((pc + 1) & 0x1fff)); int a = ((h & 0x7f) << 8) + l; if (h & 0x80) return util::string_format("*%s", SYM(a)); @@ -190,7 +170,7 @@ s2650_disassembler::s2650_disassembler(config *conf) : m_config(conf) { } -/* disassemble one instruction at PC into buff. return byte size of instr */ +// disassemble one instruction at PC into buff. return byte size of instr offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms) { uint32_t flags = 0; @@ -215,7 +195,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da pc+=1; break; case 0x0c: case 0x0d: case 0x0e: case 0x0f: - util::stream_format(stream, z80 ? "ld %s" : "loda,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "ld %s" : "loda,%s", ABS(1, rv, pc, params)); pc+=2; break; case 0x10: case 0x11: @@ -235,7 +215,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da util::stream_format(stream, "ret %c", cc[rv]); } else util::stream_format(stream, "retc %c", cc[rv]); - flags = STEP_OUT; + flags = STEP_OUT | (rv != 3 ? STEP_COND : 0); break; case 0x18: case 0x19: case 0x1a: case 0x1b: if (z80) { @@ -246,6 +226,8 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da } else util::stream_format(stream, "bctr,%c %s", cc[rv], REL(pc, params)); pc+=1; + if (rv != 3) + flags = STEP_COND; break; case 0x1c: case 0x1d: case 0x1e: case 0x1f: if (z80) { @@ -256,6 +238,8 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da } else util::stream_format(stream, "bcta,%c %s", cc[rv], ADR(pc, params)); pc+=2; + if (rv != 3) + flags = STEP_COND; break; case 0x20: case 0x21: case 0x22: case 0x23: util::stream_format(stream, z80 ? "xor r0,r%d" : "eorz,%d", rv); @@ -269,7 +253,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da pc+=1; break; case 0x2c: case 0x2d: case 0x2e: case 0x2f: - util::stream_format(stream, z80 ? "xor %s" : "eora,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "xor %s" : "eora,%s", ABS(1, rv, pc, params)); pc+=2; break; case 0x30: case 0x31: case 0x32: case 0x33: @@ -283,7 +267,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da util::stream_format(stream, "iret %c", cc[rv]); } else util::stream_format(stream, "rete %c", cc[rv]); - flags = STEP_OUT; + flags = STEP_OUT | (rv != 3 ? STEP_COND : 0); break; case 0x38: case 0x39: case 0x3a: case 0x3b: if (z80) { @@ -294,7 +278,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da } else util::stream_format(stream, "bstr,%c %s", cc[rv], REL(pc, params)); pc+=1; - flags = STEP_OVER; + flags = STEP_OVER | (rv != 3 ? STEP_COND : 0); break; case 0x3c: case 0x3d: case 0x3e: case 0x3f: if (z80) { @@ -305,7 +289,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da } else util::stream_format(stream, "bsta,%c %s", cc[rv], ADR(pc, params)); pc+=2; - flags = STEP_OVER; + flags = STEP_OVER | (rv != 3 ? STEP_COND : 0); break; case 0x40: util::stream_format(stream, "halt"); @@ -322,7 +306,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da pc+=1; break; case 0x4c: case 0x4d: case 0x4e: case 0x4f: - util::stream_format(stream, z80 ? "and %s" : "anda,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "and %s" : "anda,%s", ABS(1, rv, pc, params)); pc+=2; break; case 0x50: case 0x51: case 0x52: case 0x53: @@ -335,10 +319,12 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da case 0x58: case 0x59: case 0x5a: case 0x5b: util::stream_format(stream, z80 ? "jrnz r%d,%s" : "brnr,%d %s", rv, REL(pc, params)); pc+=1; + flags = STEP_COND; break; case 0x5c: case 0x5d: case 0x5e: case 0x5f: util::stream_format(stream, z80 ? "jpnz r%d,%s" : "brna,%d %s", rv, ADR(pc, params)); pc+=2; + flags = STEP_COND; break; case 0x60: case 0x61: case 0x62: case 0x63: util::stream_format(stream, z80 ? "or r0,r%d" : "iorz,%d", rv); @@ -352,7 +338,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da pc+=1; break; case 0x6c: case 0x6d: case 0x6e: case 0x6f: - util::stream_format(stream, z80 ? "or %s" : "iora,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "or %s" : "iora,%s", ABS(1, rv, pc, params)); pc+=2; break; case 0x70: case 0x71: case 0x72: case 0x73: @@ -377,12 +363,12 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da case 0x78: case 0x79: case 0x7a: case 0x7b: util::stream_format(stream, z80 ? "call r%d-nz,%s" : "bsnr,%d %s", rv, REL(pc, params)); pc+=1; - flags = STEP_OVER; + flags = STEP_OVER | STEP_COND; break; case 0x7c: case 0x7d: case 0x7e: case 0x7f: util::stream_format(stream, z80 ? "call r%d-nz,%s" : "bsna,%d %s", rv, ADR(pc, params)); pc+=2; - flags = STEP_OVER; + flags = STEP_OVER | STEP_COND; break; case 0x80: case 0x81: case 0x82: case 0x83: util::stream_format(stream, z80 ? "add r0,r%d" : "addz,%d", rv); @@ -396,7 +382,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da pc+=1; break; case 0x8c: case 0x8d: case 0x8e: case 0x8f: - util::stream_format(stream, z80 ? "add %s" : "adda,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "add %s" : "adda,%s", ABS(1, rv, pc, params)); pc+=2; break; case 0x90: case 0x91: @@ -414,6 +400,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da case 0x98: case 0x99: case 0x9a: util::stream_format(stream, z80 ? "jr n%c,%s" : "bcfr,%c %s", cc[rv], REL(pc, params)); pc+=1; + flags = STEP_COND; break; case 0x9b: util::stream_format(stream, z80 ? "jr0 %s" : "zbrr %s", REL0(pc, params)); @@ -439,7 +426,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da pc+=1; break; case 0xac: case 0xad: case 0xae: case 0xaf: - util::stream_format(stream, z80 ? "sub %s" : "suba,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "sub %s" : "suba,%s", ABS(1, rv, pc, params)); pc+=2; break; case 0xb0: case 0xb1: case 0xb2: case 0xb3: @@ -459,7 +446,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da case 0xb8: case 0xb9: case 0xba: util::stream_format(stream, z80 ? "calr n%c,%s" : "bsfr,%c %s", cc[rv], REL(pc, params)); pc+=1; - flags = STEP_OVER; + flags = STEP_OVER | STEP_COND; break; case 0xbb: util::stream_format(stream, z80 ? "cal0 %s" : "zbsr %s", REL0(pc, params)); @@ -469,7 +456,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da case 0xbc: case 0xbd: case 0xbe: util::stream_format(stream, z80 ? "call n%c,%s" : "bsfa,%c %s", cc[rv], ADR(pc, params)); pc+=2; - flags = STEP_OVER; + flags = STEP_OVER | STEP_COND; break; case 0xbf: util::stream_format(stream, z80 ? "call %s+r3" : "bsxa %s", ADR(pc, params)); @@ -486,15 +473,15 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da util::stream_format(stream, z80 ? "**** $%02X" : "**** $%02X",op); break; case 0xc8: case 0xc9: case 0xca: case 0xcb: - util::stream_format(stream, z80 ? "ld (%s),r%d" : "strr,%d %s", rv, REL(pc, params)); + util::stream_format(stream, z80 ? "ld (%2$s),r%1$d" : "strr,%d %s", rv, REL(pc, params)); pc+=1; break; case 0xcc: case 0xcd: case 0xce: case 0xcf: - util::stream_format(stream, z80 ? "ld %s" : "stra,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "ld %s" : "stra,%s", ABS( 0, rv, pc, params)); pc+=2; break; case 0xd0: case 0xd1: case 0xd2: case 0xd3: - util::stream_format(stream, z80 ? "rol r%d" : "rrl,%d", rv); + util::stream_format(stream, z80 ? "rlca r%d" : "rrl,%d", rv); break; case 0xd4: case 0xd5: case 0xd6: case 0xd7: util::stream_format(stream, z80 ? "out (%s),r%d" : "wrte,%d %s", rv, IMM(pc, params)); @@ -503,15 +490,15 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da case 0xd8: case 0xd9: case 0xda: case 0xdb: util::stream_format(stream, z80 ? "ijnz r%d,%s" : "birr,%d %s", rv, REL(pc, params)); pc+=1; - flags = STEP_OVER; + flags = STEP_COND; break; case 0xdc: case 0xdd: case 0xde: case 0xdf: util::stream_format(stream, z80 ? "ijnz r%d,%s" : "bira,%d %s", rv, ADR(pc, params)); pc+=2; - flags = STEP_OVER; + flags = STEP_COND; break; case 0xe0: case 0xe1: case 0xe2: case 0xe3: - util::stream_format(stream, z80 ? "cp r0,%d" : "comz,%d", rv); + util::stream_format(stream, z80 ? "cp r0,r%d" : "comz,%d", rv); break; case 0xe4: case 0xe5: case 0xe6: case 0xe7: util::stream_format(stream, z80 ? "cp r%d,%s" : "comi,%d %s", rv, IMM(pc, params)); @@ -522,7 +509,7 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da pc+=1; break; case 0xec: case 0xed: case 0xee: case 0xef: - util::stream_format(stream, z80 ? "cp %s" : "coma,%s", ABS(1,rv,pc, params)); + util::stream_format(stream, z80 ? "cp %s" : "coma,%s", ABS(1, rv, pc, params)); pc+=2; break; case 0xf0: case 0xf1: case 0xf2: case 0xf3: @@ -535,28 +522,13 @@ offs_t s2650_disassembler::disassemble(std::ostream &stream, offs_t pc, const da case 0xf8: case 0xf9: case 0xfa: case 0xfb: util::stream_format(stream, z80 ? "djnz r%d,%s" : "bdrr,%d %s", rv, REL(pc, params)); pc+=1; - flags = STEP_OVER; + flags = STEP_COND; break; case 0xfc: case 0xfd: case 0xfe: case 0xff: util::stream_format(stream, z80 ? "djnz r%d,%s" : "bdra,%d %s", rv, ADR(pc, params)); pc+=2; - flags = STEP_OVER; + flags = STEP_COND; break; } return (pc - PC) | flags | SUPPORTED; } - -u32 s2650_disassembler::opcode_alignment() const -{ - return 1; -} - -u32 s2650_disassembler::interface_flags() const -{ - return PAGED; -} - -u32 s2650_disassembler::page_address_bits() const -{ - return 13; -} |