Bosch CIS-E III

[thomas walter x5955]

>The EPROM is from Intel the numbers on it are B57604
>                                              S7804
>                                              U842005MS
>is this a standard 27256 or what??

If you peel back the label, you can use a 10X microscope and
READ the device number right through the quartz window. ;-)

Of a few laying around here:  B57604 = 27256 12.5 Vp

If you have plain EPROMS look at the die, through the window,
and soon you'll be able to recognize the 2764, 27128, and 27256's
by glance. B57607 is the 27128, btw. From the internal Bosch
number sceme it is clear numbers are asigned arbitrarily to
the Bosch Bxxxxx marking code.

Cheers,

Tom