Quick question

[Ludis Langens]

Shannen Durphey wrote:
> 
> Yup.  I've done it plenty of times.  Ya just need to fill the bottom
> of the eprom with zeros.

Fill the bottom half of the 27512 with FF's.  That way it'll program
faster - and you won't be wearing out the EPROM cells.

A 1227165 or 1227730 hooks a 27256's VPP pin to 5 volts.  In a 27512,
the pin is reused for address line A15.  Hence, the '7165/'7730 will use
the '512's upper half.

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org