| 摘要 |
<p>PURPOSE:To decrease manhours for parts management and to prevent erroneous mounting of memory and to improve the productivity by controlling the chip selection of a memory means by an address switching means so that the same area can be accessed by a different address and writing information by a different program. CONSTITUTION:Blank ROM is mounted at specific position 81-816 of an appara tus 1. Since the machine 1 and a jig 10 are connected each other, one side of the input terminal of AND gate G1 is grounded through terminals 1e, 10e, and ROM 81-816 of the apparatus side can not be accessed by the address which is used when the apparatus is used as a single unit. Then, the sound data and single unit program are read out from the master ROM 111-1116 according to the copy program of a copy control ROM 12 by the control signal from CPU 2, and are written on the ROM 81-816 through a ROM 12 is accessed from the address which is used when the machine is used as a single unit, the ROM 8 is accessed by different address by the write-control signal from a decoder 4, and to the area of the address which is accessed at use of single apparatus.</p> |
