TORRENS SR wrote:
>
> Hi,
> I'm building a small project using the PIC 16c74. I need to use an
> EEPROM to store up to 99 data files. Each file will be in the
> following format
>
>
 $GPRMC,HHMMSS,A,DDMM.MMM,N,DDDMM.MMM,W,XXX.X,XXX.X,DDMMYY,XXX.X,E*XX,BBBBBBBB,2
 2
>
> The file contains the RMC output from a GPS receiver, followed by an
> 8 bit binary number and last of all the file number i.e.22
>

I used microchip's 24lc65
it can contain 8192 byte of data and up to 1000.000 times rewritable
(some parts of it up to 10.000.000 times )
if you store each char as a byte it takes a little space , but
if you make it as I did and store every two numbers as one byte
(not very efficient but it nearly doubles the capacity :))
it will be more than enough .
hh 1 byte
mm 1
ss 1 (why store seconds ? it'll take more than a few seconds to
        move the stuff)
a 1
dd 1
mm 1
and so on
use a lookup table and don't store the points and useless chars like
the year part of the string .

I made the proto with a basic stamp 2 and the read part was about two
line long :)

something like :
lookup i,x,(1,2,3,4,6,7,8,9 etc the positions to store)
serin pin,baud,("gll",wait(x),byte)

I guess there're some errors in the lines above , but it shows the
basic idea

bye
charley