Hardware register addresses

[Tom Hussey]

Hi Dave,

1060 and 1061 are the J1850 controller. I have most of this code
disassembled and commented. 18xx is a timer i/o. There are references to
this part but I have no specs. I even phoned the Delco IC division to
try and get my hands on a data sheet. So far...no luck. If I can get
someone who has a manual to look into the PIDs we will have many of
these ports defined. I will buy/borrow a shop manual soon if nobody here
has one. The segment of code I sent out the other day contains a
reference to the timer chip. There is a watchdog built into it such that
if the processor goes south it doesn't keep injectors spraying or
whatever.

-Tom

DAVE_HEMPSTEAD at HP-Andover-om3.om.hp.com wrote:
> 
> Hi,
>    I've seen software listings fly by which indicate that people
> understand the
> contents of the hardware registers in out ECM's (for 94,95,96,97 GM
> ECM's).
> 
>    I've got the 68HC11 F1 book describing the registers in that chip,
> located
> from 0x1000 thru 0x105f.  What I'm missing is the hardware registers
> from 0x1060
> through 0x1809.  Can anyone point me to descriptions for these
> registers?
> 
>    I also don't know what the port registers in the MCU are connected
> to.  I can
> try to guess from the software, but, since I haven't traced out the
> circuit
> board so I don't really know.  Can anyone point me to descriptions of
> how the
> port registers are used in the 68HC11??
> 
> Thanks,
> Dave Hempstead