ELECTRONIC EQUIPMENT,申请号JP19890208158-传众专利搜索

ELECTRONIC EQUIPMENT

申请公布号：JPH0371232(A)

申请号：JP19890208158

申请日期：1989.08.10

申请公布日期：1991.03.27

申请人：

SANYO ELECTRIC CO LTD;TOTTORI SANYO ELECTRIC CO LTD

发明人：ISHIGURO KAZUTOSHI;KANBARA HARUAKI

分类号：G06F9/22;G06F9/06;G06F11/28

主分类号：G06F9/22

摘要：PURPOSE:To eliminate the need for reforming a mask ROM again even if a fault is present in once formed mask ROM by converting an inputted address indicating a prescribed area of the mask ROM into an address indicating a previously determined area of a PROM. CONSTITUTION:A ROM is constituted of a unrewritable mask ROM 3, a rewritable PROM 4 and a memory control means 5 for converting an inputted address indicating the prescribed area of the mask ROM 3 into the previously determined area of the PROM 4. Even if the fault is present in a control program stored in the mask ROM 3, a correction program for the fault part is stored in the PROM 4. Thereby, when a main control part 1 is to read out the fault part of the mask ROM 3, the corrected program in the PROM 4 can be read out and executed.