C4 Processors and Programming
Thread Starter
Pro
Joined: Aug 2004
Posts: 737
Likes: 4
From: Decatur Alabama
C4 Processors and Programming
Happy Friday everyone!!!
I'm curious about the processors and software used in the 1996 LT1 on board computer....does anyone have any idea on where i can get some info on them???
thanx!
I'm curious about the processors and software used in the 1996 LT1 on board computer....does anyone have any idea on where i can get some info on them???
thanx!
Drifting
Joined: Jun 2004
Posts: 1,477
Likes: 87
With the LT1 engine, LT1 Edit is what alot of folks use for re-flashing the PCM. Most use a laptop to run the software w/a cable connected to the OBDI (OBDII in your case I believe) port under the dash to upload it.
Here's a link for the LT1 Edit software
http://www.carputing.com/
There's other stuff too, just not personally familiar with them.
Here's a link for the LT1 Edit software
http://www.carputing.com/
There's other stuff too, just not personally familiar with them.
Burning Brakes
Joined: Jan 2001
Posts: 1,169
Likes: 0
From: Manhattan
Burning Brakes
Joined: May 1999
Posts: 760
Likes: 1
From: Greenwich, CT
IIRC, for the Mass Air LT1's processors are a GM version of the 68HC11F1. FLASH memory for OBDI is two AN28F512's. For OBDII it's one AN28F010 and one AN28F512.
These PCM's use two separate HC6811's, packaged separately (called "Event" and "Time" side) on their own boards. They are stacked together in the PCM case and communicate with each other over a serial bus.
Try a Google search for M68HC11RM.pdf. (It's the Motorola ref manual.) I notice there is a data sheet (MC68HC11F1.pdf) also on Google.
AFAIK, programming is still in Assembly. Check the HPTuner boards for some code development discussion.
These PCM's use two separate HC6811's, packaged separately (called "Event" and "Time" side) on their own boards. They are stacked together in the PCM case and communicate with each other over a serial bus.
Try a Google search for M68HC11RM.pdf. (It's the Motorola ref manual.) I notice there is a data sheet (MC68HC11F1.pdf) also on Google.
AFAIK, programming is still in Assembly. Check the HPTuner boards for some code development discussion.
Burning Brakes
Joined: May 1999
Posts: 760
Likes: 1
From: Greenwich, CT
IIRC, for the Mass Air LT1's processors are a GM version of the 68HC11F1.
FLASH memory for OBDI is two AN28F512's. For OBDII it's one AN28F010
and one AN28F512.
These PCM's use two HC6811's, packaged separately (called "Event" and
"Time" side) on their own boards. They are stacked together in the PCM
case and communicate with each other over a serial bus.
Try a Google search for M68HC11RM.pdf (it's the Motorola ref manual). I
notice there is a data sheet (MC68HC11F1.pdf) also on Google.
AFAIK, programming is still in Assembly. Check the HPTuner boards for
some code development discussion.
FLASH memory for OBDI is two AN28F512's. For OBDII it's one AN28F010
and one AN28F512.
These PCM's use two HC6811's, packaged separately (called "Event" and
"Time" side) on their own boards. They are stacked together in the PCM
case and communicate with each other over a serial bus.
Try a Google search for M68HC11RM.pdf (it's the Motorola ref manual). I
notice there is a data sheet (MC68HC11F1.pdf) also on Google.
AFAIK, programming is still in Assembly. Check the HPTuner boards for
some code development discussion.
Burning Brakes
Joined: May 1999
Posts: 760
Likes: 1
From: Greenwich, CT
IIRC, for the Mass Air LT1's processors are a GM version of the 68HC11F1.
FLASH memory for OBDI is two AN28F512's. For OBDII it's one AN28F010
and one AN28F512.
These PCM's use two 68HC11's, packaged separately (called "Event" and
"Time" side) on their own boards. They are stacked together in the PCM
case and communicate with each other over a serial bus.
Try a Google search for M68HC11RM.pdf (it's the Motorola ref manual). I
notice there is a data sheet (MC68HC11F1.pdf) also on Google.
AFAIK, programming is still in Assembly. Check the HPTuner boards for
some code development discussion.
FLASH memory for OBDI is two AN28F512's. For OBDII it's one AN28F010
and one AN28F512.
These PCM's use two 68HC11's, packaged separately (called "Event" and
"Time" side) on their own boards. They are stacked together in the PCM
case and communicate with each other over a serial bus.
Try a Google search for M68HC11RM.pdf (it's the Motorola ref manual). I
notice there is a data sheet (MC68HC11F1.pdf) also on Google.
AFAIK, programming is still in Assembly. Check the HPTuner boards for
some code development discussion.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Go here:
ftp://ftp.diy-efi.org/uploads/
And you'll find a disassembly of the T-side of the LT-1 OBD2 PCM:
LT1_obd2_tside_dis.zip
and LT5 disassemblies:
lt5dis_01.zip
Plus more more more!
ftp://ftp.diy-efi.org/uploads/
And you'll find a disassembly of the T-side of the LT-1 OBD2 PCM:
LT1_obd2_tside_dis.zip
and LT5 disassemblies:
lt5dis_01.zip
Plus more more more!
