seek knowledge

[David A. Cooley]

Mike,
Some PCM's (P6 and P4) have the operating program in the MEM-CAL... Others
(C3) have the software in embedded ROM either on the CPU chip itself, or ROM
chips built into the computer.
-----Original Message-----
From: Mike Pilkenton <mpilkent at ptw.com>
To: DIY-EFI <DIY_EFI at efi332.eng.ohio-state.edu>
Date: Thursday, April 15, 1999 11:13 PM
Subject: seek knowledge


>Well this is probably a basic question for you experts but I have to start
>somewhere.  I understand that the various MEMCALs contain the efi tables,
>fuel, spark curves, etc. in the form of hex codes programmed into the
>EEPROM.  However there must be am operating system or basic program that
>runs on the computer and controls the logic.  For example:
>
>step 1:  go get engine data
>step 2:  pump fuel and spark
>step 3:  repeat
>
>Although this is extremely oversimplified, my question is: does this basic
>program also reside in the MEMCAL or is it resident somewhere else on the
>ECM computer?  I would also like for someone to email me a sample program
>perhaps converted to some common programming language so as to illustrate
>the typical logic involved with runnung an efi system.  I'm not ready to
>play with fuel and spark maps but just want to gain more systems level
>knowledge.
>
>Mike Pilkenton
>
>