The TV-Computer is a clone of the discontinued 'Nintendo Family Computer' (or 'Famicom'), sold in the USA as the 'NES' or 'Nintendo Entertainment System.'

The Famicom runs on the Ricoh 2A03 processor, a variant of the
MOS 6502 8-bit processor


The Famicom once had a Disk-Drive Accessory
http://www.famicomworld.com/Disk_System/Disk_System_Biography.htm

This history of home computers (pre-PC) is very relevant:
http://en.wikipedia.org/wiki/Home_computers