Dick Smith released the VZ-300 (same model as the VTech Laser 310) in 1985. It was basically a VZ-200 with 16K RAM (the VZ-200 had 8K RAM), a slightly updated BASIC ROM and a better standard keyboard.
The 16K cartridge could be plugged into the VZ300, as well as a new 64K version, but it only gave a total of 34 KB. Only language machine programs could take advantage of the extra 32 KB thanks to the Z80 bank switching facility.
I had one 20-something years ago. It was a good little workhorse, until the conduit that carries the blue smoke it runs on sprung a leak.
Thursday 12th June 2014
Lisati (New Zealand)
just got one today, have spent the last few hours loading tapes and mucking around with it, for me it all started with the commodore 64, the collection just keeps growing, books, magazines, now a Tandy printer, it seems old computers are becoming a bit more of a active hobby for me
Sunday 16th February 2014
dave (Australia )
Typo: the video processor is teh 6847, not 6807. And I wouldn''t call it a "coprocessor."