Re: EPROM Programmer

On Fri, 04 Nov 2005 07:06:24 -0500, Bart wrote:

> I recently acquired an EPROM programmer that plugs into my printer port on
> my PC. The software allows me to take all the hex info off one chip and put
> it on another, or edit the hex info (hex editor) as I guess most programmers
> do.
> Is there any "cool" stuff I can do with this thing? I fantasized taking the
> EPROM off my 486 motherboard, copying it into a larger capacity chip and
> adding DOS onto the chip but the Internet searches lead me to believe that's
> apples and oranges.
> Most of my searches tend to imply that programming an EPROM is proprietary
> to a processor/microprocessor and not much mention of software to make
> things happen between the two. Is there anything "neat" I can do with just
> my EPROM programmer without getting deeply involved integrating a processor?
> Can I put a small database on an EPROM chip with my programmer, then mount
> the chip on a small circuitboard that plugs into a serial/parallel port on a
> PC and access the data with a simple QBASIC program?
> Hoping there is something else "cool" I can do with EPROM chips than just
> copy them.

Well, depending on your breadboarding skills, you can do any number of
things. But you'll have to get into the guts, the nuts and bolts, the
ones and zeros of binary EPROM programming. Your hex file shows you the
bit pattern in the EPROM. And erased EPROM should show all FF.

So, you've got a universal logic chip that, for any given pattern of
13 (14? 15? 16? depends on the EPROM) input bits, you can define a unique
pattern of 8 output bits.

State Machine?
Bootstrap ROM/OS? (You'd have to hand-assemble that, like any other idea
here) Sound Generator?
Logic Generator?
Character ROM?

Use your imagination! And the web, like http://www.google.com and stuff.

Have Fun!
Rich

.

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