公开(公告)号：US3818460A

公开(公告)日：1974-06-18

申请号：US31957572

申请日：1972-12-29

申请人： HONEYWELL INF SYSTEMS

发明人： LEMESSURIER BEARD A ,  COULEUR J ,  RUTH R ,  LANGE R ,  MONTEE R

IPC分类号： G06F9/46 ,  G06F9/32 ,  G06F9/34 ,  G06F9/355 ,  G06F12/02 ,  G06F12/06 ,  G06F9/20 ,  G05B19/28 ,  G06F9/10

CPC分类号： G06F9/342 ,  G06F9/32 ,  G06F12/0623

摘要： An extended addressing mechanism is disclosed for a digital computer system in which absolute addresses are generated over a span which exceeds the address span that can be generated by the address field of the computer instructions. For user slave programs, the regular base address register is augmented by an extended base address register. For operating system master mode programs, two master base address registers are provided, one for general purpose address augmentation and the other for special accumulator load/store instructions. In order to enable transformation of effective addresses to absolute addresses, special addition logic and control logic are also provided and combined so that effective addresses are selectively augmented or not, without increasing the time for preparation of the absolute address.

摘要翻译： 公开了一种用于数字计算机系统的扩展寻址机制，其中绝对地址在超过可由计算机指令的地址字段产生的地址跨度的跨度上生成。 对于用户从站程序，常规基址寄存器由扩展基址寄存器增加。 对于操作系统主模式程序，提供两个主基地址寄存器，一个用于通用地址扩充，另一个用于特殊的累加器加载/存储指令。 为了实现有效地址到绝对地址的转换，特殊的附加逻辑和控制逻辑也被提供和组合，使得有效地址有选择地增加，而不增加准备绝对地址的时间。