EPROM

[source2]

I have got a lot EProm (UV erasable) from 27c32- to 27c2042 (about 40 pieces)
what can I do with this ICs. Some intresting project and a good programmer

thans

 

[prateeksikka]

with a standard lab tool programmer fill a preplanned data at all locations in the RAM say :
AA BB CC DD EE FF GG HH II JJ KK LL MM NN OO PP QQ RR SS TT UU VV WW XX YY ZZ
and retrive it through a microcontroller into your PC as a text file( a notepad document)
Wouldnt that be interesting if u r a newbie? its simple!
8)

 

[source2]

Hi

Any project or something?!

 

[prateeksikka]

this project mainly requires u to have a good hand one one programming language good luck! ;D

 

[source2]

Unfortunately, I cant write in one one language (Kettes számrendszer) but there arent any compiler

 

[prateeksikka]

a part of your project would be to test if this ROM is ok.
write data say FF into all locations of ROM through a parallel port interface like LAB TOOL 48. and retrieve the data back .Can u write some code in C or assembly language or even VB?
;D

 

[source2]

I have an experiment with EProm (D27128) I wired eight LED to the Data Pins and I give +5V to the ROM. (nothink happenned), but when I give +5V to P (program) PIn , some led lighted. If I put +5V to the A pins (a0,a1,a2,a3,etc) the led lighted a lot of varieties.

Can you speak any other languages ?

 

[prateeksikka]

hi there!
by default u have 00 data at all locations in a ROM.So no LED had glown when u just give supply. When u make a data pin high u write 1 at some place which is reflected onto the data line so an LED had glown!
in third case i guess the address and data lines may be multiplexed when u addressed  a particular location,that particular data came onto the data bus and made the LED glow!
good work buddy! keep it up!