29 Sep
2014
29 Sep
'14
8:36 a.m.
"There is also a small dedicated Internet community
<http://en.wikipedia.org/wiki/Internet_community> who have reverse
engineered <http://en.wikipedia.org/wiki/Reverse_engineering> the BIG TRAK
and the Texas Instruments <http://en.wikipedia.org/wiki/Texas_Instruments>
TMS1000 <http://en.wikipedia.org/wiki/TMS1000> microcontroller
<http://en.wikipedia.org/wiki/Microcontroller> inside it."
Might be worth looking into. I also have the feeling that (in light of the
fairly limited TS1000 hardware, and what seems a simple task of controlling
16-32 toy locos) it might actually be easier to write a new software for a
cheap, modern uC - a Microchip PIC for example - and outright replace the
TS1000 in your model RR controller.
It would also make it simpler to offer upgrades to other model RR fans with
the same controller setup.
On Mon, Sep 29, 2014 at 1:55 AM, Charles Harris <charles7 at slingshot.co.nz>
wrote:
Hi
I am a model railroader (in HO scale) and use a digital controller from
the 1980s. The controller is a Hornby UK, Zero 1. This device is based
around the TMS1000NLP and has been excellent value over 30 years. The only
small improvement I would like to make is to increase the number of
locomotive addresses to above the current limit of 16. (because of4-bit
chip).
The TMS1000 has a masked program (MP0186) and the ram can be dumped in 2
ways, by removing physically the top of the chip and photographing etc.
The second option is dumping code via the test mode, as mentioned in TI
literature.
I would like to be able to discuss with someone about instructions to use
the Test Mode etc. Also I would like to locate a list of the TI TMS1000
programs MP**** (incl the MP0186 above)
Dave Caroline was good enough to direct me to this mailing list.
Thankyou
Charles Harris
NZ