Prom Burner & EEPROM's

[Swayze]

thanks, now I see why all the emulator circuits I've looked at have a PIC
micro (or other) and include sram (or similar) to actually download to from
the PC.

Is there a cheap and easy way to switch (via cable) the EEPROM in and out of
the ECM circuitry?(or is it as simple as a 'dip' clip?) for programming?

Ludis, I'd like to set the ECM case up with a connector and leave all the
EEPROM circuitry in there and hook up external too it, (changes on the fly
are not what I'm after, although the 6in1 circuitry (on incoming) really
intrigued me). If this is in the archives, or a file on incoming, please
'point' me at it.

byE
Mike
Swayze
mswayze at truswood.com
kswayze at bellsouth.net

----- Original Message -----
From: "Ludis Langens" <ludis at cruzers.com>
........
> Yes, there are some flash chips that can be used that way - however, the
> ECM has to be doing the programming.  Or at least you'd have to add a
> bunch of multiplexers to make the chip think the ECM is doing the
programming.
>
> > then it would
> > really only be a timing issue as to when to switch sectors.
>
> The chips that can be read while being programmed can't "switch"
> sectors.  The intended way of using them is to have one sector contain a
> small bootstrap function that never changes.  This bootstrap function
> knows how to download new code into the rest of the flash.
...........

----------------------------------------------------------------------------
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