I use the CPU_1A1 board with no problems.
I asume you can get the on board BASIC to run?
Are you using a bootstrap loader?
If programming with your own code what mode are you running the HC11
in, i.e. MODA & MODB pins?
Are you using the watcdog timer?
Have you configured the memory mapping correctly and the PORTG bank
Last itme I looked at the source code for the BASIC it did not write
too the flash.
As a hint get the source code for the BASIC from the web site it has
the code too init the memory mappng and bank selection.
Also have a look at my project and loader using the CPU_1A1 at
I have a CPU_3A2 board, and have had no major issues getting it up and
I did have some initial troubles, but those were mainly getting a
development toolchain setup for Linux, hence I couldn't use the tools which
are downloadable from the PMB website.
In my case I didn't buy Paul's development board and breadboarded my own
power supply and rs232 transcever etc etc. Are you doing something similiar
or have you brought a development board (btw there was at some stage a plan
to develop a new devboard with a CPLD to incompase an LCD interface and
matrix keyboard etc etc)
Can you give some specifics about difficulties you are having in getting the
board up and running.
If you like I can send you an application which will run under the Buffalo
bootloader which sends "Hello World" via the serial port. Using Buffalo for
"gaining a footing" on the platform is an easy way to atleast get the
initial things working. However that might be of no benifit if you problems
are else where, such as in bringing up the device from your own firmware
(i.e. with no bootloader available etc).
My suggestion would be to email Paul directly ( firstname.lastname@example.org) he is a
really easy guy to get on with and would only be to happy to suggest tips
etc on getting your project up and running, or to discuss tricky problems
you are running into.
If you want further help, I'd be happy to help out where I can. Email me if
Thanks for responding,
I also did not buy the board, because I thought that I could get it
breadboarded by myself, as I already have a cable with RS-232
translation and I wanted to save a little money. However I think that
my major problems are coming from the software aspect instead. I
cannot get the visual basic program that Paul made to install on my
computer because every time it tries it wants to update something, but
it never gets past that point. Did you ever try this program? I guess
if you worked in Linux you probably didn't.
he is a
On 7 Aug 2003 10:11:34 -0700, email@example.com (Ryan) wrote:
Try using the boot loader at
It is MSDOS based and written for the CPU1A board, but you can change
it to suite as full source code is provided.
I just thought of another thing to be aware of possibly...
If you are having troubles interfacing to other devices and you downloaded
the schematics a long time ago it might pay to download a new copy.
I personally found one or two bugs in the schematics and Paul updated the
downloaded schematic to actually match the real hardware. From memory (I'd
have to look into my old emails for specifics) there were a few cases where
some of the signals had accidently been transposed (I even vaguly think at
one stage RX and TX where accidently labelled wrong :-( _).
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