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m6809: Disassembly tweaks

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- Use FCB directive to represent illegal opcodes
- Remove unnecessary spaces for instructions without operands
This commit is contained in:
AJR 2018-07-24 20:21:49 -04:00
parent 6e0055ccd7
commit 87f729ce23
1 changed files with 8 additions and 2 deletions
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10
src/devices/cpu/m6809/6x09dasm.cpp
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@ -113,7 +113,10 @@ offs_t m6x09_base_disassembler::disassemble(std::ostream &stream, offs_t pc, con
const opcodeinfo *op = fetch_opcode(opcodes, p); const opcodeinfo *op = fetch_opcode(opcodes, p);
if (!op) if (!op)
{ {
stream << "Illegal Opcode"; // illegal opcode
util::stream_format(stream, "%-6s$%02X", "FCB", opcodes.r8(pc));
for (offs_t q = pc + 1; q < p; q++)
util::stream_format(stream, ",$%02X", opcodes.r8(q));
return (p - pc) | SUPPORTED; return (p - pc) | SUPPORTED;
} }
@ -126,7 +129,10 @@ offs_t m6x09_base_disassembler::disassemble(std::ostream &stream, offs_t pc, con
p += numoperands; p += numoperands;
// output the base instruction name // output the base instruction name
util::stream_format(stream, "%-6s", op->name()); if (op->mode() == INH)
stream << op->name();
else
util::stream_format(stream, "%-6s", op->name());
switch (op->mode()) switch (op->mode())
{ {