Daydreaming at Cone Shaped Hat Headquarters

[Joe Boucher]

In a discussion on, if I remember right, the eec-iv list the merits of
hacking GM vs Ford was done.  A plus for the eec-iv was the circuit board
was on the surface of the board only.  A minus for the GM was the circuit
board was layered.  Is this true?  Would complying with the request below
then involve putting a high impedance multimeter (he can be taught!) on the
requested pin and trying every other pin on the board.  That's an over
simplified explanation.

The next decision is am I willing to risk my daily driver for this research
project.

Joe Boucher
'70 RS/SS Camaro  '81 TBI Suburban


[Big Snip]

> Could someone with a '747 trace out the following parts of the circuit
> board?  Find the 40 pin dip marked 16023263 (aka 23263.)  Trace out
> where pin 30 is connected.  (That's the MAF input.)  It may go to pin 14
> of a chip marked 16043538 (aka 43538.)  If so, trace out where 43538 pin
> 15 comes from.  It should go through a resistor network and then to the
> harness connector.  If 23263 pin 30 instead connects to a chip marked
> 16004773 (aka 4773), that is the output of a 4049 CMOS buffer.  Find the
> corresponding input and continue tracing it back.  There is also a
> chance that 23263 pin 30 is simply grounded.
>
>                unsigned long BinToBCD(unsigned long i) {unsigned long t;
> Ludis Langens     return i ? (t = BinToBCD(i >> 1), (t << 1) + (i & 1) +
> ludis at cruzers.com            (t + 858993459 >> 2 & 572662306) * 3) : 0;}