29C256 Flash works great!

[Squash]

It takes me about 2 minutes to program a 27256.  It feels more like an hour, tho!

Squash

--- "Shawn R. Lin" <slin01 at mail.orion.org> wrote:
> WEG1192 at aol.com wrote:
> > 
> > How does this differ from a ROM emulator? If I understand this flash device,
> > you still have to pull the chip, and fast erase/reprogram without the 15
> > minute EPROM erase step?
> 
> John,
> The flash chip is very different from a ROM emulator:
> 1) The flash chip is nonvolatile - remove power from it, and the
> contents are still there.
> 2) It cannot be updated or changed "on the fly".
> 
> Also since the P4 ECM's don't support writing to flash chips, the chip
> also cannot be programmed in the car.  I suppose a very enterprising
> individual could probably connect the /WE (Write Enable) pin to
> something in the ECM and write a program that allows updates through the
> ALDL though.
> 
> So yes, you are absolutely correct that you do still have to pull the
> chip, but it can fast erase/reprogram without the 15 minute EPROM erase
> step.  I believe erasing is probably nearly instantaneous taking only a
> few milliseconds.  I think it also programs a LOT faster compared to an
> EPROM.  I can't remember how long it takes to program an EPROM, but this
> flash chip was completely programmed as soon as I pressed the ENTER key
> (1 second or faster).  Probably worth the $4, IMO!
> 
> Shawn
> 
> 
> 
> ________________________________________________________
>                            1stUp.com - Free the Web
>    Get your free Internet access at http://www.1stUp.com
> ----------------------------------------------------------------------------
> 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
> 


=====
Trains, Trucks, and EFI at http://www.trailrunners4x4.org/users/realsquash

__________________________________________________
Do You Yahoo!?
Yahoo! Mail - Free email you can access from anywhere!
http://mail.yahoo.com/
----------------------------------------------------------------------------
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