HC11 programming (was reset vector on a 68hc11)

[Pat Ford]

Previously, you (Bill Shaw) wrote:
> >> It might be quicker to just re-write the code in C.
> >
> >I was thinking that, but it's nice to see how it was done.
> >
> 
> I like the idea of using tables compatable with the GM code and using
> custom code to work with them.  We'd be able to use promedit or some
> equivilent to manage the tables,  and have all the mystery of the GM code
> gone. Maybe instead of reverse engineering the GM code we should start an
> effort to design the custom C code?

 I've never programmed on the hc11 family, so I'm trying to get a handle on 
the beast befor starting from scratch. Once  get C code to work, the whole 
730 will also make a good general purpose microcontroller 

> 
> >>Do you have an hc11 emulator?  It's really tough to get any significant
> >>piece >of code running
> >> without one.
> >
> >nope, don't have one. any idea of price for one?

 the first project I did at work was a nobios startup on a NS486sxf, no stack,
no working ram ( the first thing I did was setup the ram). I've worked in the
dark before.

> 
> If Charlie's could be bought for a few hundred it'd be a good deal.  Looks
> like about $800 for a new Wytec setup for one hc11 variant family.  Then
> the problem becomes the C compiler.  I know there's stuff out there for
> Unix,  but are there any shareware or freeware C compilers for DOS?
> Charlie's Cosmic compiler is a good one (I've used the cpu32 version) but
> even if he'd part with it for a few hunderd,  now we're up to $600-$800,  a
> good deal for a full development solution,  but still kind of pricy for a
> hobby tool.

djgpp is a dos port of gcc go to 

http://www.delorie.com

that will get you gcc ( gnu C compiler)

http://home.worldnet.fr/stcarrez/m68hc11_port.html
 
> >>
> >> I'm thinking about using a newer GP PCM like this,  with a 68332 and BDM
> >> board from the EF332 project.
> >
> > once again any idea of price for one. I have a 730 and harness ( thanks
> >Paul >T.)
> >so I thought it would do.
> 
> BDMs are cheap, about $16 in the group buy. No idea on junkyard prices for
> the newer GM ECMs,  but I've been told here on this list about $200 new for
> the PCM,  and about $250 core.  The problem again becomes the C compiler,
> not to mention much less public knowledge of the newer PCMs.

what controller are in the gm pcms??

> 
> The 730 (or 749) isn't a bad choice.  They've been well hacked and probably
> wouldn't be too tough to put together a memory map.
> 
> Bill
> 
> 

--
Pat Ford                           email: pford at qnx.com
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