[Diy_efi] Continuing the chip switcher problem

[mbelloli at speedymotorsports.com]

Hello Everyone,
     I had asked the question eariler in regards to creating a mulitple
bank chip switcher for an ecm.  Everyone basically said I should be
able to just switch the chip without any regard for whether the chip
is being accessed during the switch.  I finally got my pic chip
controller up and running.  I'm running at 20mhz, and when I do a
switch I'm still getting a check engine light.  2 out of three times.
 Thinking about this, I put the same exact bin in each of the banks
of the chip, and still get the same response.  Could it not be that
I'm switching in the middle of a read, and that is causing this
problem???  What does everyone think.  If I turn the car off, and do
the switch no problem.  I'm using this on a 1991 acura integra....had
a 27c256 as the base chip, and I'm using a 29c010 as the replacement.
 I'm controlling the highest two address lines as bank select for a
total of 4 banks.
     I'll put the info for chip changer on my webesite, and add a link to
it tonight.

     Any ideas???

Thanks,

Marcello

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