A data processing apparatus with a function of effecting a hang-up processing inhibits detecting retention of an access request as a hang-up, when the access request is accepted by a predetermined port. The apparatus includes a single time counting unit (76) provided in common for hang-up detection...http://www.google.com.tw/patents/US5721869?utm_source=gb-gplus-share專利 US5721869 - Data processing apparatus with function of effecting hang-up processing
