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Document the way invalid opcodes are handled.

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This commit is contained in:
Radosław Kujawa 2018-04-01 21:16:58 +02:00
parent 3c684fbf2c
commit 68fa918d97
1 changed files with 8 additions and 1 deletions
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9
src/rk65c02.c
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@ -123,8 +123,15 @@ rk65c02_exec(rk65c02emu_t *e)
if (!instruction_modify_pc(&id))
program_counter_increment(e, &id);
} else {
rk65c02_log(LOG_ERROR, "unimplemented opcode %X @ %X\n",
/*
* Technically, on a real 65C02, all invalid opcodes
* are NOPs, but until rk65c02 reaches some level of
* maturity, let's catch them here to help iron out the
* bugs.
*/
rk65c02_log(LOG_WARN, "invalid opcode %X @ %X\n",
i.opcode, e->regs.PC);
e->state = STOPPED;
e->stopreason = EMUERROR;
}