Conditions used in ERROR call should be subclass of class ERROR

[Yehouda]

cl-6502/src/conditions.lisp

Line 3 in 46628d6

(define-condition illegal-opcode ()

The conditions in this file are defined without a parenty-type, they are direct subclass of condition. That means that error handlers (for example ignore-errors), which expect a condition of type error, don't handle these conditions.
They all should be made to inherit from error, e.g.

(define-condition illegal-opcode (error)
   ....