memcals (jeffery green)

[Dave]

-----Original Message-----
From: Jeffery Green <jgreen11 at cfl.rr.com>
To: gmecm at diy-efi.org <gmecm at diy-efi.org>
Date: Wednesday, May 02, 2001 10:29 AM
Subject: Re: memcals


>I have a question about these chips.
>I'll save you the long story. I broke the chip farthest from the eprom.
>Can I get a blank chip and copy the data from a spare memcal.
>If so what type of chip is it.
>
>Thanks Jeff


Upon speaking to a couple of people and reading the the gmecm00 archives, I
have found out that they are 'resistor networks', ie a bunch of resistors
interconnected within a single chip.  Therefore you cant get a 'blank' one
and get it programmed.

Dave

>
>----- Original Message -----
>From: "Allan Langford" <allanlangford at yahoo.com>
>To: <gmecm at diy-efi.org>
>Sent: Monday, April 30, 2001 7:25 PM
>Subject: Re: memcals
>
>
>> You will find one of the boards in the v6 memcal is the knock decoder, i
>> have a 4cyl JE 2ltr memcal if you want to swap for a v6 one :)
>>
>> Regards,
>>     Allan Langford
>>
>> www.geocities.com/allanlangford
>> Celica XX GTE Project
>> ----- Original Message -----
>> From: Dave <bigg at adam.com.au>
>> To: gmecm <gmecm at diy-efi.org>
>> Sent: Tuesday, May 01, 2001 2:02 AM
>> Subject: memcals
>>
>>
>> > I wondering if anyone can help me. I've noticed differences in internal
>> > parts in memcals comparing between an Oz V8 and V6 (for '808 ecm).
>There
>> > are 2 chips mounted next to the eprom (14 pin and 16 pin).  Looking at
>> Ludis
>> > Langens' site, he refers to them as 'resistor packs'. What exactly are
>> they?
>> > Are they what the ecm uses for the 'limp home' mode?
>> > Will the differences between the V6/V8 memcal prevent one being used
for
>> > another, eg: program a V8 bin onto eprom and use in the V6 memcal to
>> control
>> > a V8?
>> > If it wont work, is there a modification I can do to make it work? The
>> > reason I ask is, I have quite a few V6 memcals but no V8 ones.
>> >
>> > Also, I was at a computer recyclers today and noticed a lot of old
cards
>> > being thrown out which contained 27C256 eproms.  Is it possible to use
>> them
>> > instead of 27C128 by just putting the bin image into the first half of
>the
>> > addresses? or any other way?
>> >
>> > Thanx, Dave
>> >
>> >
>> >
>> >
>>
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