ROM A Board?

[John(Wales-UK)]

Hey all

Anyone know what the ROM A board is about?

http://www.ebay.co.uk/itm/TRS-80-Model-I-Model-1-Expansion-Interface-Mini-Disk-Much-More-/232403107120?hash=item361c4dfd30:g:9C0AAOSwu59ZYl0q

Thanks

John

 

[Petrofsky]

It appears to be a General Northern Microcomputers (GNOMIC) feature ROM board, a simple board that attaches to the Model I system bus and maps a 2k ROM into the hole in the Model I address space at 0x3000-0x37FF.

The auction also includes a nice gold-plated system bus splitter, probably also made by GNOMIC, which allows you to plug two devices into the system bus.

See TRS-8BIT, March 2016, p. 20 for more info. The features provided in the "Feature ROM A" include: lowercase shift-lock, autorepeat, flashing cursor, and a T-BUG-like monitor.

To initialize it, you probably have to type something like SYSTEM[ENTER]/12288[ENTER]. If you buy it and post a dump, some one will probably figure out how to use it.

 

[John(Wales-UK)]

Many thanks