公开(公告)号：US3651475A

公开(公告)日：1972-03-21

申请号：US3651475D

申请日：1970-04-16

Applicant: IBM

Inventor： DUNBAR ROBERT G JR ,  WOMACK KARL K

IPC: G06F12/06 ,  G06F9/20

CPC classification number: G06F12/0623

Abstract: An address check boundary (ACB) register is initialized in accordance with the total amount of control/main storage with common addressing and with the relative amounts of control and main storage for the purpose of: 1. PROVIDING THE HIGHER ORDER BITS OF CONTROL STORE ADDRESS THUS PERMITTING FEWER BITS IN THE MICROPROGRAM SUPPLIED CONTROL STORE ADDRESS WITH RESULTING REDUCTION IN THE CONTROL WORD SIZE; 2. MODIFYING THE ACB supplied higher order bits and/or the microprogram supplied address bits where required; 3. SUPPLYING THE BOUNDARY ADDRESS BETWEEN CONTROL/MAIN STORE TO INITIATE AN ERROR SIGNAL IF MAIN STORE IS ACCESSED WHEN CONTROL STORE SHOULD HAVE BEEN ACCESSED AND VICE VERSA; 4. PROVIDING DATA REGARDING THE TYPE (INTERNAL - EXTERNAL) AND AMOUNT OF MAIN STORAGE AND REGARDING THE SYSTEM TYPE - SIMPLEX (ONE PROCESSOR) OR DUPLEX (TWO PROCESSORS).

Abstract translation: 地址检查边界（ACB）寄存器根据具有共同寻址的控制/主存储总量以及相对控制量和主存储量进行初始化，目的是：