🚀 go-pugleaf

"Maurice Anderson" <mauriceanderson@hotmail.com> wrote in message
news:416f57d3$1@newsgroups.borland.com...
> Hello,
>
> Does anyone know how to access data from an Eeprom chip?   I want to
access
> an Eeprom both internally on the current computer and externally via the
LPT
> or COMM port.  Is there a component available?  Any help would be greatly
> appreciated especially examples.

I think you are going to have to be more specific.  Do you mean eprom
devices that are on your computer, or do you mean eprom devices that you
might purchase at an electronics store and want to program/read yourself?

If you mean that you want to connect your computer to an eprom device, you
will need some sort of hardware device that can provide the interface
between the computer's port(s) and the eprom itself.  You can't just connect
a few pins on the eprom to a few pins on your parallel port and read/write
data to it.

Many years ago, I built an eprom programmer for 2716's which I controlled
from my Z-80 Big Board computer.  I communicated with the programmer using
the computer's two 8-bit parallel ports: one port for control, the other for
data, and I wrote all of the code to control the programmer using Turbo
Pascal 1.0 for CP/M (there were no components in those days!).  And believe
it or not, I still have that old computer and eprom burner.

If you want to read the contents of an eprom on your computer, then you are
going to need a lot of detailed information about the hardware (addresses,
interrupts, I/O ports, registers, etc), and you'll probably have to burn a
little program into a BIOS chip (which is itself an eprom!) to do the work
of actually talking to the eprom.  Sounds like a chicken and egg problem,
doesn't it?

Good luck!

- Dennis