Search results
Results From The WOW.Com Content Network
The maximum random access memory (RAM) installed in any computer system is limited by hardware, software and economic factors. The hardware may have a limited number of address bus bits, limited by the processor package or design of the system. Some of the address space may be shared between RAM, peripherals, and read-only memory.
If the command is a NOP (CS low or CA0–2 = HHH), the chip idles. If the command is a refresh command (CA0–2 = LLH), the chip enters the self-refresh state. If the command is a burst terminate (CA0–2 = HHL), the chip enters the deep power-down state. (A full reset sequence is required when leaving.)
The command interpreter for DOS runs when no application programs are running. When an application exits, if the transient portion of the command interpreter in memory was overwritten, DOS will reload it from disk. Some commands are internal—built into COMMAND.COM; others are external commands stored on disk.
DDR4 memory is supplied in 288-pin dual in-line memory modules (DIMMs), similar in size to 240-pin DDR3 DIMMs. DDR4 RAM modules feature pins that are spaced more closely at 0.85 mm compared to the 1.0 mm spacing in DDR3, allowing for a higher pin density within the same standard DIMM length of 133.35 mm (5¼ inches).
Earlier DIMM generations featured only a single channel and one CA (Command/Address) bus controlling the whole memory module with its 64 (for non-ECC) or 72 (for ECC) data lines. Both subchannels on a DDR5 DIMM each have their own CA bus, controlling 32 bits for non-ECC memory and either 36 or 40 data lines for ECC memory, resulting in a total ...
Start monitoring a memory location for memory writes. The memory address to monitor is given by DS:AX/EAX/RAX. [m] ECX and EDX are reserved for extra extension and hint flags, respectively. [n] Usually 0 [o] Prescott, Yonah, Bonnell, K10, Nano: MWAIT [l] MWAIT EAX,ECX: NP 0F 01 C9: Wait for a write to a monitored memory location previously ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The fourth (t RAS) is often omitted, or a fifth, the Command rate, sometimes added (normally 2T or 1T, also written 2N, 1N or CR2). These parameters (as part of a larger whole) specify the clock latency of certain specific commands issued to a random access memory. Lower numbers imply a shorter wait between commands (as determined in clock ...