Don't actually know a ton about this computer. It was given to me a couple years ago in it's beautiful box but I've been unable to test it as I don't have a TV with the proper inputs to use with it. Someday soon I hope! It looks like at some point someone did a hardware mod of some sort. Here are some pictures including the mod.
Processor: 0.89 MHz Motorola 6803
Video: 32x16 Text Mode, 64x32 BASIC 8 Colours, 128x192 Machine Code 2 Colours
I/O: RF video out, Expansion port, Tape (DIN6), Serial (DIN5)
Power: 8V AC 1.5A adapter
OS: MicroColor Basic 1.0 by Microsoft