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evo: some advances

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This commit is contained in:
Olivier Galibert 2023-11-01 09:50:30 +01:00
parent 114253de7f
commit 12e5ee992d
2 changed files with 51 additions and 12 deletions
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61
src/devices/cpu/evolution/evod.cpp
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@ -13,29 +13,68 @@ u32 evolution_disassembler::opcode_alignment() const
// 3ea2 is table 4x2
const char *const evolution_disassembler::regs[4] = { "a", "b", "c", "d" };
// 36b0 = Penguin Rescue
// 3593 = table of pairs (adr, 0040)
// 403e1f: indexes the table at 403ea2 somehow
/*
start:
400051: fc80 ? fc80 (c c a)
400052: f842 push2 c
400053: f862 push2 d
400054: f802 push2 a
400055: f882 ? f882 (a c a)
400056: f8c2 ? f8c2 (a d c)
400057: f8e2 ? f8e2 (a d d)
400058: fc82 ? fc82 (c c a)
400059: fc9c ? fc9c (c c a)
40005a: fc83 ? fc83 (c c a)
40005b: fc9d ? fc9d (c c a)
end:
4000a5: fcdd ? fcdd (c d c)
4000a6: fcc3 ? fcc3 (c d c)
4000a7: fcdc ? fcdc (c d c)
4000a8: fcc2 ? fcc2 (c d c)
4000a9: f8e3 ? f8e3 (a d d)
4000aa: f8c3 ? f8c3 (a d c)
4000ab: f883 ? f883 (a c a)
4000ac: f803 pull2 a
4000ad: f863 pull2 d
4000ae: f843 pull2 c
4000af: fcc0 ? fcc0 (c d c)
*/
// 4005e9: 3e.3d = 5b1981 = address of a table of addresses
const char *const evolution_disassembler::regs[] = { "a", "b", "c", "d", "e", "f", "g", "h" };
const evolution_disassembler::instruction evolution_disassembler::instructions[] = {
{ 0x9100, 0xff00, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "bne %06x", (pc + 1 + s8(opcode)) & 0x1fffff); }},
{ 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)) & 0x1fffff); }},
{ 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); }},
{ 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]); }},
{ 0xb000, 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.h = #%02x", regs[(opcode >> 9) & 3], opcode & 0xff); }},
{ 0xc100, 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); }},
{ 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); }},
{ 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]); }},
{ 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)); }},
{ 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]); }},
{ 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"); }},
{ 0xfd40, 0xffe0, 2, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "jsr %06x", ((opcode & 0x1f) << 16) | arg); }},
{ 0xfe40, 0xffe0, 2, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "jmp %06x", ((opcode & 0x1f) << 16) | arg); }},
{ 0xfd00, 0xff00, 2, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "jsr %06x", ((opcode & 0xff) << 16) | arg); }},
{ 0xfe00, 0xff00, 2, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "jmp %06x", ((opcode & 0xff) << 16) | arg); }},
{ 0xff41, 0xffff, 1, [](std::ostream &stream, u16 opcode, u16 arg, u32 pc) { util::stream_format(stream, "rti"); }},
{ 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)", opcode, regs[(opcode >> 9) & 3], regs[(opcode >> 6) & 3]); }}
{ 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]); }}
};
offs_t evolution_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params)

2
src/devices/cpu/evolution/evod.h
View File

@ -27,7 +27,7 @@ private:
std::function<void (std::ostream &, u16, u16, u32)> fct;
};
static const char *const regs[4];
static const char *const regs[];
static const instruction instructions[];
};