Computer interface

Details Computer interface Computer interface

Category

G - Physics

Subcategory

06

Subsubcategory

F

CPC

354/239

IPC codes

G06F 12/10 (2006.01) G06F 12/02 (2006.01)

Type

Patent

Patent number

CA 1232078

Description

-72- ABSTRACT: "IMPROVEMENTS IN OR RELATING TO COMPUTERS" The disclosure relates to a computer having master control unit (MCU) interposed between a main memory (M) and the processor (CPU) whereby the address and data buses (ABUS and DBUS)from the (CPU) connected to the (MCU) which via secondary address and data bus (ABUS 2 and DBUS 2) is connected to the main memory (M). Control signals for reading and writing from the (CPU) are connected to the (MCU). The (MCU) issues its own secondary read and write signals (R2 and W2) when reading and writing in the main memory. The (MCU) contains an internal memory for a data descriptor table (DT) a set of internal index registers (XRO-XRQ), three arithmetic circuits (AC1-AC3), a mode decoder (MD), and index register decoder (XDEC), a mask and shift unit (MSU) and a range check and conversion unit (RCU). The virtual address issued by the CPU on the address bus (ABVS) consists of two parts the first part being used to indicate one of the possible entries in the data descriptor table (DT) required for translation of virtual addresses issued by the (CPU) on the address bus (ABUS) into real addresses issued by the (MCU)to the main memory on the secondary address bus (ABUS 2)and a second part containing a mode indicator to permit modification of the logic performed by the (MCU) when performing an address translation.The data descriptor table contains at least one entry for every addressable data element or structure in the main memory (M), whereby the actual entry is indicated by means of an address decoder (ADEC 1). The arrangement is such that the processor issues virtual addresses and the master controller converts the virtual addresses into real addresses in the main memory, the master control having means for -73- performing any address calculation or index multiplication independent of any program functions.

Application Number

475677

Affiliated with

Also associated with

Rating

Computer interface does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Computer interface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer interface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1205511