Wanted: Vintage Texas Instruments Guru

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