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author AJR <ajrhacker@users.noreply.github.com>2018-07-24 20:21:49 -0400
committer AJR <ajrhacker@users.noreply.github.com>2018-07-24 20:21:51 -0400
commit87f729ce23186d26be3257c8a852f47f4a10bb46 (patch)
tree797de54e48cc35be44bff7cefe351cf791db7fd0
parent6e0055ccd7c8a525f3841599b8c6310e5bd2fbc5 (diff)
m6809: Disassembly tweaks
- Use FCB directive to represent illegal opcodes - Remove unnecessary spaces for instructions without operands
-rw-r--r--src/devices/cpu/m6809/6x09dasm.cpp10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/devices/cpu/m6809/6x09dasm.cpp b/src/devices/cpu/m6809/6x09dasm.cpp
index 393eba18998..9b7721ab268 100644
--- a/src/devices/cpu/m6809/6x09dasm.cpp
+++ b/src/devices/cpu/m6809/6x09dasm.cpp
@@ -113,7 +113,10 @@ offs_t m6x09_base_disassembler::disassemble(std::ostream &stream, offs_t pc, con
const opcodeinfo *op = fetch_opcode(opcodes, p);
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;
}
@@ -126,7 +129,10 @@ offs_t m6x09_base_disassembler::disassemble(std::ostream &stream, offs_t pc, con
p += numoperands;
// 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())
{