Purpose Transistor
2009
 |
| No items matching your keywords were found. |
Purpose Transistor
Changing a HP dvd writer back to a liteon
want to change the HP DVD Writer back to a Liteon. For that I have been told that to use an Unscrambled Firmware flasher and an EEPROM utility. I am not having much knowledge about these things. So thought that this is the right place to post the query. Please help me as soon as possible.
Re: Changing a HP dvd writer back to a liteon
The EEPROM (Electrically Erasable Read Only Memory) are also erasable PROM, but unlike EPROM, they can be erased by a simple electric current, that is to say, they can be erased even whenposition in the computer. For this you will have to understand about the types of ROM. Different types of ROM memory contain data required to start, that is to say :
The BIOS is a program to control the input / output interfaces of the main system, hence the name sometimes given to the BIOS ROM chip ROM on the motherboard that hosts it.
The boot loader: a program to load the operating system memory (RAM) and run it. It generally looks the operating system on the floppy disk, then the disk drive, which allows to start the operating system from a system disk in case of malfunction of the system on the disk hard.
The CMOS Setup, the screen is available to the lighting of the computer to change the system settings (often called BIOS wrongly ...).
The Power-On Self Test (POST) program performed automatically at boot time to do a system test (which is why for example you see the system "after" the RAM at startup).
Re: Changing a HP dvd writer back to a liteon
A variant of this called flash memory (also Flash ROM or flash EPROM). Unlike conventional EEPROM, using 2-3 transistors per bit to remember, the flash EPROM uses a single transistor. On the other hand, the EEPROM can be written and read word by word, while flash can be erased by pages (the page size is constantly decreasing). Finally the density of flash memory is more important, allowing the realization of chips containing hundreds of megabytes. EEPROM and are preferentially used for data storage configuration and flash memory for the programmable code (computer programs).
Re: Changing a HP dvd writer back to a liteon
Electrically Erasable Programmable Read Only Memory. PROM type memory whose contents, once programmed, can be erased by applying a voltage and reprogrammed. The BIOS (B asic I nput / O utput S ystem) is a small memory located on the motherboard, the data define the parameters of the system. They may, however, contain errors (bugs). Moreover, with the emergence of new hardware BIOS manufacturers may decide to update their BIOS. Such upgrading the BIOS is known as flashing.
Re: Changing a HP dvd writer back to a liteon
The BIOS manufacturers then sold BIOS inserts on media that can be changed materially, but the price was very high at the time. Then came the advent of electronically programmable memory , that is to say, a memory that can be changed through a machine sending electrical impulses through connectors provided for that purpose. This type of controller chip, however, was rare, so that the operation was still relatively expensive for the user. So take care while flashing the HP DVD Writer.
Re: Changing a HP dvd writer back to a liteon
Before flashing the BIOS, it is essential to consider the interests of the exposure. Indeed, the flash will update the BIOS for various reasons (fixing bugs, adding new features, support for new hardware) but the changes made are not necessarily directly affect all users. Furthermore it is possible that the new BIOS itself brings new bugs. Thus, improvements that can make the flash (usually described in a file accompanying the new BIOS) are they worth the pain of incurring the risks of flashing the BIOS?
About the Author
http://install-how.blogspot.com/2010/05/changing-hp-dvd-writer-back-to-liteon.html
anyone know a equivalent transistor for a ss9013 its npn and genral purpose i think?
looks like a 2N2222 will do fine.
.
Complementary Transistor Pair
