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Topic: Memory data register

	Processor register - Wikipedia, the free encyclopedia
		In computer architecture, a processor register is a small amount of very fast computer memory used to speed the execution of computer programs by providing quick access to commonly used values—typically, the values being in the midst of a calculation at a given point in time.
		Registers are normally measured by the number of bits they can hold, for example, an "8-bit register" or a "32-bit register".
		Registers are now usually implemented as a register file, but they have also been implemented using individual flip-flops, high speed core memory, thin film memory, and other ways in various machines.
	en.wikipedia.org /wiki/Processor_register (495 words)

	Microprogram - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-12)
		The memory in which it resides is called a control store.
		A register set is a fast memory containing the data of the central processing unit.
		There may also be a memory address register and a memory data register, used to access the main computer storage.
	www.butte-silverbow.us /project/wikipedia/index.php/Microprogramming (1335 words)

	Memory address register - Wikipedia, the free encyclopedia
		The memory address register is the register of a computer's control unit that contains the address of a register to fetch or store from or to the computer storage.
		The memory address register is half of a minimal interface between a microprogram and computer storage.
		The other half is a memory data register.
	en.wikipedia.org /wiki/Memory_address_register (101 words)

	Methods and apparatus for reading memory device register data - US Patent 6496420 (Site not responding. Last check: 2007-10-12)
		A methods and apparatus for reading register data from a memory device and outputting the register data to external data terminals of the memory device that outputs a first set of data bits from a memory array to the external terminals responsive to a first addressing signal.
		Data is coupled to or from the memory banks 80a-h through the sense amplifiers 104 and the I/O gating circuit 102 and a data path subsystem 108, which includes a read data path 110 and a write data path 112.
		The present invention provides methods and apparatus for reading register data from a memory device and outputting the register data to external data terminals of the memory device, primarily using addressing and data path circuitry in the memory device that is normally used to read data from the memory device.
	www.patentstorm.us /patents/6496420.html (6547 words)

	Memory data register - Wikipedia, the free encyclopedia
		The memory data register (MDR) is the register of a computer's control unit that contains the contents of a register to fetch or store from or to the computer storage.
		The memory data register is half of a minimal interface between a microprogram and computer storage.
		The other half is a memory address register.
	www.wikipedia.org /wiki/Memory_data_register (102 words)

	Untitled Document (Site not responding. Last check: 2007-10-12)
		Register rb has its value passed on to the ALU stage, but a decision is made as to whether the value of register rc or the immediate field of the instruction itself gets passed to the ALU as the second operand.
		Sometimes this is implemented by writing to the register during the first half of the cycle and reading the two input registers on the second half of the cycle: for example, using posedge(clock) to write and negedge(clock) to read register values.
		DF: Data Fetch: Fetch the data from memory or registers.
	www.rivier.edu /faculty/amoreira/web/cs556a/hands/tut5 (2454 words)

	Methods and apparatus for reading memory device register data - US Patent 6654293 (Site not responding. Last check: 2007-10-12)
		an output data buffer coupled to the multiplexing circuit to sequentially receive the first and second portions of the second plurality of data bits, the output data buffer operable to sequentially transmit the first and second portions to the output terminal responsive to a clock signal.
		an output data path coupled to the driver circuit and the memory data amplifier circuitry to provide the parameter data and memory data to the output terminals in response to receiving the respective data.
		a driver circuit coupled to the output terminals of the memory device, and to the output data buffer to receive the first and second portions of the parameter data and memory data, the driver circuit operable to alternately transmit the first and second portions of the parameter data and memory data to the output terminals.
	www.patentstorm.us /patents/6654293.html (7426 words)

	Methods and apparatus for reading memory device register data - Patent 6064600
		a data path circuit coupled to the memory array to receive the first plurality of data bits, to the coupling circuit to receive the third plurality of data bits, and to the external terminals, the data path circuit operable to transmit the data bits received to the external terminals of the memory device.
		the driver circuit is further coupled to the output data buffer to receive the first and second portions of the second and third pluralities of data bits, the driver circuit being operable to sequentially transmit the first and second portions of the second and third pluralities of data bits to the data terminals.
		The device of claim 10 wherein the memory device has a sense-amplifier circuit, and the register driver circuit is further coupled between the sense-amplifier circuit and the first and second sets of interim storage latches, the sense-amplifier circuit being disabled when the selector signal is in the second state.
	www.freepatentsonline.com /6064600.html (8978 words)

	lecture2 (Site not responding. Last check: 2007-10-12)
		A register is a level of memory that is smaller and faster than the main memory.
		Memory Data Register (MDR) – contains the data to be written into memory or which receives the data read from memory.
		The program fragment adds the content pf the memory at address 940 to the content of the memory word at address 941 and stores the result in the latter location.
	carbon.cudenver.edu /~esbrowde/csc3453/lecture/lecture2.html (837 words)

	Read-only memory having data register for holding output data - Patent 5151876
		Thereafter, the parallel data stored in the data register is outputted to a printing output circuit as serial data in synchronization with reception by a printing output circuit, thereby to perform printing processing.
		Thereafter, transmission of the font data is synchronized with reception by the printing output circuit 27 and then, the printing font data is outputted to the printing output circuit 27 through the data bus 25 in response to a control signal of the CPU 21.
		The parallel data of 1 word.times.8 bits is accepted in the data register 1 and held therein in synchronization with the inputted timing output signal TO1.
	www.freepatentsonline.com /5151876.html (2853 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		After referring to the instruction pointer, the next instruction is fetched from memory.
		Data Registers - Storage cells that hold the data necessary to perform the current operation.
		Memory Data Register (MDR) - holds the actual value of the data that was fetched or is to be stored.
	www.cbu.edu /~mschultz/ITM250/cpuRAM_files/sheet002.htm (227 words)

	Register-Memory Data Access (Site not responding. Last check: 2007-10-12)
		There have been a variety of restrictions that allow at least one memory operand in arithmetic and logical instructions, but require certain operands to be in registers.
		Generally, as technology reduced the cost or chip area of circuitry, the restrictions were lifted.
		For this example, it is assumed that the instruction set has two operand arithmetic instructions, the first source operand is also the destination operand and only the second source operand can be in memory.
	www.d.umn.edu /~gshute/arch/register-memory.html (116 words)

	VAX MACRO and Instruction Set Reference Manual
		The Vector Memory Activity Check (VMAC) register, shown in Figure 10-7, is used to guarantee the completion of all prior vector memory accesses.
		The vector registers to be used by a vector instruction are specified by the vector control word operand.
		If asynchronous memory management handling is implemented, and VPSR is set when the scalar processor sends the vector processor an instruction, the vector processor clears VPSR, and retries the faulting memory reference before any new vector instructions in the queue are executed.
	www.itec.suny.edu /scsys/vms/vmsdoc/72final/4515/4515pro_031.html (2868 words)

	[No title]
		The first 8-bits (left to right) are the opcode ORI, the second 5-bits are the Destination Register Address, the third 5-bits is the register that the Immediate Data is "OR'ed" to, the last 15-bits is the Immediate Data that will be added to register location "00000"(which is the third 5-bits).
		During this state the Controller loads ALU1 (register to hold data to be used by the ALU) with the immediate data and also loads ALU2 with the register SA ("00000") contents.
		The Controller then activates the logic function in the ALU to output the logical "OR" of the two inputs this should be "00000000000000000000000001000111"because the bits in the register located at "00001" are reset to zeros upon start-up.
	www.ele.uri.edu /~pepperc/final_cpu_report.html (664 words)

	CMPE120 Lecture Note: Mic-1 (Site not responding. Last check: 2007-10-12)
		One byte load to the MBR from memory which is indexed by the PC.
		A 32-bit word-addressable memory port is controlled by two registers, MAR (Memory Address Register) and MDR (Memory Data Register).
		The registers are loaded onto the B bus.
	www.engr.sjsu.edu /cfu/cmpe120/Mic-1/1.html (273 words)

	GDB Internals: Target Architecture Definition
		If the virtual frame pointer is kept in a register, then define this macro to be the number (greater than or equal to zero) of that register.
		If the program counter is kept in a register, then define this macro to be the number (greater than or equal to zero) of that register.
		If the stack-pointer is kept in a register, then define this macro to be the number (greater than or equal to zero) of that register.
	sources.redhat.com /insight/onlinedocs/gdbint_9.html (4991 words)

	System Control Instructions in Assembly Language
		The more powerful version is a privileged instruction and includes access to portions of the status register that can control or modify other processes.
		This may include any or all of: setting registers to an initial value, setting the program counter to a standard starting location (restarting the computer), clearing or setting interrupts, and sending a reset signal to external devices.
		Memory management instructions control memory and how memory is mapped and accessed by user and system routines.
	www.osdata.com /topic/language/asm/syscont.htm (906 words)

	Registers in the CPU (Site not responding. Last check: 2007-10-12)
		MDR: memory data register holds the data to be written to memory or just read from memory
		Not to be confused with the motherboard bus in which you plug cards or memory upgrades.
		Registers transfer data between themselves via the bus
	faculty.juniata.edu /rhodes/org/ch6cpu.htm (155 words)

	MDR - Memory Data Register, MetaData Repository, MicroDesign Resources, Minimum Design Requirement
		Memory Data Register is not the only word formed from MDR.
		Searched for more definitions; no definitions of MDR found.
		Every attempt has been made to provide you with the correct acronym for MDR.
	www.auditmypc.com /acronym/MDR.asp (157 words)

	Load/Store Architecture (Site not responding. Last check: 2007-10-12)
		With addressing modes, all instructions (for example arithmetic instructrions) are able to use operands which are directly in memory.
		A signal is sent to the memory device instructing it to place the value of the addressed memory cell into the MDR.
		The value is then copied from the MDR to the appropriate register.
	www.cs.indiana.edu /~crcarter/SPARC/loadStore.html (203 words)

	index
		There are various types of registers within the XL16, the General Purpose Registers (GPR), the Memory Address Register(MAR), the Memory Data Register(MDR), the Immediate Register, the Instruction Register, the Program Counter (PC) and the Processor Status Register(PSR).
		The Memory Address Register holds the address of the memory being accessed.
		The Memory Data Register is part of the Read Output Decode in the Memory section.
	www.cs.utah.edu /~fivas/cs3710/registers.htm (229 words)

	Instruction Execution (Site not responding. Last check: 2007-10-12)
		The data is sent from memory address in the MAR over the SB and stored in the MDR.
		The instruction in the MDR is copied into the IR, to free the MDR for more instruction or data fetches.
		If the instruction requires operands, they are each obtained from memory and placed into the MDR and transfered to one or more DRs.
	condor.depaul.edu /~sjost/210loop/materials/detailed.html (141 words)

	CSC 110: Lab Activity #6
		Register R - single register for holding operands for mathematical operations
		However, keep in mind that each of the items in memory are actually represented in binary.
		You can also draw a picture of memory to help picture the program.
	einstein.cs.uri.edu /courses/fall2003/csc110s3/labs/lab6.html (530 words)

	Encyclopedia: Memory data register (Site not responding. Last check: 2007-10-12)
		A control unit is the part of a CPU or other device that directs its operation.
		The terms storage (U.K.) or memory (U.S.) refer to the parts of a digital computer that retain physical state (data) for some interval of time, possibly even after electrical power to the computer is turned off.
		Click for other authoritative sources for this topic (summarised at Factbites.com).
	www.nationmaster.com /encyclopedia/Memory-data-register (315 words)

	Memory Data Register (Site not responding. Last check: 2007-10-12)
		The Memory Data Register (MDR) holds loaded data so that the memory address can change.
		In this case, we could just keep the address constant by holding the ALU control signals constant, but we want to think in terms of separating the stages (gets us ready for PI).
		No enable is required; MDR only needs to hold the data for one clock cycle.
	www.ece.msstate.edu /~reese/linder/Courses/EE4713/notes/codChapter5/Multiple-Cycle_Implementation/MCI_Datapath/New_Registers/Memory_Data_Register/memory_data_register.html (63 words)

	22C:122/55:132, Homework 6, Spring 2003 (Site not responding. Last check: 2007-10-12)
		Assume that field offsets in structures are small integers (less than 256), and that the integer i is already loaded in some register.
		With reference to the notes on the machines indicated, estimate (with reasonable certanty), the number of machine instructions, and the number of bytes of instruction space that it would take to implement the statement
		Note that the emphasis of this problem is not on the assembly language of the machine, simple numeric answers, if they are correct, will be granted full credit; partial credit will depend on how effectively you document how you got your answers.
	www.cs.uiowa.edu /~jones/arch/spring03/hw/06.html (315 words)

	McObject - Precision Data Management: The eXtremeDB Main Memory Embedded Database for Smart Devices
		, the in-memory embedded database for devices that are eXtremely innovative.
		Plus some features you probably wouldn't expect in a database engine compact enough for the most deeply embedded systems, such as event notifications and object history.
		McObject is the leading in-memory embedded database vendor.
	www.mcobject.com (193 words)

	Machine Architecture (Site not responding. Last check: 2007-10-12)
		R is register reference(e.g., 4 bits --> 16 registers)
		Today's GHz+ machines and upcoming 64 bit machines, the numbers go up almost linearly.
		For example in "C", as we see later, memory for data in blocks of storage pointed to by a register (in this case R2):
	faculty.juniata.edu /rhodes/lt/macharch.htm (134 words)

	[No title]
		It is not described in this text.¡tæ&&&&ÿÿþ"«"óÊA¨#Four Types of Instruction Operands ¡$" ¨¤A constant embedded within the instruction representation, or The contents of a register, or The contents of a memory location, or The contents of an I/O port.
		There's a one-to-one correspondence between physical addresses and the 32-bit offsets produced by effective address calculations.
		Memory looks like a single continuous space, called a linear address space.
	www.cse.scu.edu /~dlewis/book1/4.ppt (352 words)

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