🚀 go-pugleaf

Robert Korevaar wrote:
> 
> Hi
> 
> Please could someone explain the following to me :
> 
> flash bios
> IE4
> EPROM and EEPROM  - what is the difference
> 
> Thanks
> 
> Laura

  eprom - acronym for erasable programmable read only memory.  this is a
rom chip that can be erased and reprogrammed many times.  these chips
are erased by ultraviolet light and should not be exposed to direct
sunlight. chips are programmed with a prom programmer, instructions and
data are written onto chips.
  eeprom - Acronym for electrically erasable programmable read-only
memory. Pronounced double-ee-prom, an EEPROM is a special type of PROM
that can be erased by exposing it to an electrical charge. Like other
types of PROM, EEPROM retains its contents even when the power is turned
off. Also like other types of ROM, EEPROM is not as fast as RAM. EEPROM
is similar to flash memory (sometimes called flash EEPROM). The
principal difference is that EEPROM requires data to be written or
erased one byte at a time whereas flash memory allows data to be written
or erased in blocks. This makes flash memory faster.
  flash bios - Pronounced "bye-ose," an acronym for basic
                input/output system. The BIOS is built-in software
                that determines what a computer can do without
                accessing programs from a disk. On PCs, the BIOS
                contains all the code required to control the
                keyboard, display screen, disk drives, serial
                communications, and a number of miscellaneous
                functions. 
                The BIOS is typically placed on a ROM chip that
                comes with the computer (it is often called a ROM
                BIOS). This ensures that the BIOS will always be
                available and will not be damaged by disk failures. It
                also makes it possible for a computer to boot itself.
                Because RAM is faster than ROM, though, many
                computer manufacturers design systems so that the
                BIOS is copied from ROM to RAM each time the
                computer is booted. This is known as shadowing. 
  *****   Many modern PCs have a flash BIOS, which means
  *****   that the BIOS has been recorded on a flash memory
  *****   chip, which can be updated if necessary. 
                The PC BIOS is standardized, so all PCs are alike
at                 this level (although there are different BIOS
versions).                 Additional DOS functions are usually added
through                 software modules. This means you can upgrade to
a newer                 version of DOS without changing the BIOS. 
                PC BIOSes that can handle Plug-and-Play (PnP)
devices                   are known as PnP BIOSes, or PnP-aware BIOSes.
These                     BIOSes are always implemented with flash
memory rather                 than ROM. 
  ie4 - microsoft internet explorer 4

most information obtained from www.pcwebopedia.com