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evo: possible indirect access

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This commit is contained in:
Olivier Galibert 2023-11-01 10:33:09 +01:00
parent 12e5ee992d
commit 5f940d8bb7
1 changed files with 13 additions and 3 deletions
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16
src/devices/cpu/evolution/evod.cpp
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@ -44,6 +44,12 @@ u32 evolution_disassembler::opcode_alignment() const
4000ad: f863 pull2 d
4000ae: f843 pull2 c
4000af: fcc0 ? fcc0 (c d c)
40019e: 8d..? 3e.3d = 5b8119, 40.3f = 400b5b, jst 403a4f
40309b: simple access?
-> 4015c6
*/
// 4005e9: 3e.3d = 5b1981 = address of a table of addresses
@ -52,20 +58,24 @@ const char *const evolution_disassembler::regs[] = { "a", "b", "c", "d", "e", "f
const evolution_disassembler::instruction evolution_disassembler::instructions[] = {
{ 0x8000, 0xf000, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "bra %06x", (pc + 1 + util::sext(opcode, 12)) & 0xffffff); }},
{ 0x9000, 0xff00, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "beq %06x", (pc + 1 + util::sext(opcode, 8)) & 0xffffff); }},
{ 0x9100, 0xff00, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "bne %06x", (pc + 1 + util::sext(opcode, 8)) & 0xffffff); }},
{ 0x9000, 0xf000, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "bxx %x, %06x", (opcode >> 8) & 0xf, (pc + 1 + s8(opcode)) & 0xffffff); }},
{ 0xa000, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%02x = %s", opcode & 0xff, regs[(opcode >> 9) & 3]); }},
{ 0xa100, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "(%02x) = %s", opcode & 0xff, regs[(opcode >> 9) & 3]); }},
{ 0xb000, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = %02x", regs[(opcode >> 9) & 3], opcode & 0xff); }},
{ 0xb100, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = (%02x)", regs[(opcode >> 9) & 3], opcode & 0xff); }},
{ 0xc000, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = %s + #%04x", regs[(opcode >> 9) & 3], regs[(opcode >> 9) & 3], (opcode & 0xff) << 8); }},
{ 0xc100, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = %s - #%04x", regs[(opcode >> 9) & 3], regs[(opcode >> 9) & 3], (opcode & 0xff) << 8); }},
{ 0xd000, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = %s + #%02x", regs[(opcode >> 9) & 3], regs[(opcode >> 9) & 3], opcode & 0xff); }},
{ 0xd800, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = #%02x", regs[(opcode >> 9) & 3], opcode & 0xff); }},
{ 0xd900, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = %s - #%02x", regs[(opcode >> 9) & 3], regs[(opcode >> 9) & 3], opcode & 0xff); }},
{ 0xe000, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%02x <> %s", opcode & 0xff, regs[(opcode >> 9) & 3]); }},
{ 0xe100, 0xf900, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%02x ?? %s", opcode & 0xff, regs[(opcode >> 9) & 3]); }},
{ 0xe800, 0xf93c, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = %s + #%x", regs[(opcode >> 9) & 3], regs[(opcode >> 6) & 3], 1 << (opcode & 3)); }},
{ 0xe804, 0xf93c, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "%s = %s - #%x", regs[(opcode >> 9) & 3], regs[(opcode >> 6) & 3], 1 << (opcode & 3)); }},
{ 0xf802, 0xff1f, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "push2 %s", regs[(opcode >> 5) & 7]); }},
{ 0xf803, 0xff1f, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "pull2 %s", regs[(opcode >> 5) & 7]); }},
{ 0xf802, 0xff3f, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "push2 %s", regs[(opcode >> 6) & 3]); }},
{ 0xf803, 0xff3f, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "pull2 %s", regs[(opcode >> 6) & 3]); }},
{ 0xfc8d, 0xffff, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "push b"); }},
{ 0xfccd, 0xffff, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "pull b"); }},
{ 0xfd00, 0xff00, 2, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "jsr %06x", ((opcode & 0xff) << 16) | arg); }},
@ -74,7 +84,7 @@ const evolution_disassembler::instruction evolution_disassembler::instructions[]
{ 0xff42, 0xffff, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "rts"); }},
{ 0xffff, 0xffff, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "nop"); }},
{ 0x0000, 0x0000, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "? %04x (%s %s %s)", opcode, regs[(opcode >> 9) & 3], regs[(opcode >> 6) & 3], regs[(opcode >> 5) & 7]); }}
{ 0x0000, 0x0000, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "? %04x (%s %s)", opcode, regs[(opcode >> 9) & 3], regs[(opcode >> 6) & 3]); }}
};
offs_t evolution_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params)