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Why read and write control lines in a dma controller bidirectional?
The read and write control lines running through the data buses have control signals. The microprocessor can read data from memory or write data to the memory so the data buses are bidirectional. One direction is needed to write the data while another direction is required for the read command to fetch the data.
Similarities between ram and rom?
There are none as RAM allows random write access while ROM only allows read access (the very reason why it's called ROM because it stands for Read-Only Memory).
Is a flash drive read only or read write?
You can write to a flash drive and read data from the flash drive. It acts the same as a miniature hard drive, just like the one on your computer. It uses flash memory, hence the name flash drive.
Is ram write only memory?
One can read and over-write data in RAM.It allow stored data to be accessed in any order with a worst case performance of constant time.It is volatile types of memory,where its stored information is lost if the power is removed.
What are memory read memory write IO read IO write operation in concept of microprocessor 8085 give the detail explanation?
Each data transfer is 3 clock cycles. The first cycle emits address and status, and ALE is used to strobe the low order address. Status is S0, S1, and IO/M- The second cycle sets up the transfer, either floating the data bus for a read, or drving the data bus for a write, and then initiating transfer with RD- or WR-. If READY is not true at the sample point (about the middle of the second cycle) an extra cycle is appended after the second cycle, with all lines frozen, until READY goes true. The third cycle wraps up the transfer. The processor samples data one half cycle before the end of RD- for a read, and it holds the data bus valid for one half cycle after WR- for a write. Up to this point, all cycles are similar. What matters is IO/M-. If high, this is an IO read or IO write; if low, this is a memory read or memory write. However, you have to consider S0 and S1. These are advanced status pins, along with IO/M-, that indicate what the processor is doing. They are emitted at ALE. In addition to indicating IO Read, IO Write, Memory Read, and Memory Write, you can decode Opcode Fetch, Interrupt Acknowledge, and Halt.
Was there school and books 30000 years ago?
No. This would be during the caveman and no one could read or write. All knowledge, poetry, songs, & legends were passed down by memory.
Is their anything in particular a memory card reader cannot read?
There are at least 17 types of memory cards and only a couple of readers will read that many.You only need one that will read the types you have.
What do the acronyms ROM mean?
Compact Disc-Read Only Memory
What are the different computer memory types?
The 5 types are: SIMM DIMM SODIMM SORIMM RDRAM The basic types are volatile memory such as RAM memory and 'permanent' memory such as hard drives USB, external drives and CD/DVDs
How is a single-session disc different from a multisession disc?
A single-session disc (CD-ROM-Read-Only Memory) can read but not write (record) or erase. Manufacturers write all items on the single-session disc at one time, and multisession disc (CD-RW-Compact Disc-Rewritable) is an erasable disc you can write on multiple times.
What is one of the best ways to learn how to write?
One of the best ways to learn how to write is to read a lot! The more you read, the more you see how it's done and how other writers write. Read as much as you can, then practice your own storytelling and write your own work.
One Who can not read and write?
An illiterate person
