BBC Micro Model B with a Viglen ROM system

This BBC Model B is a relatively standard version with the exception of the addition of a Viglen Sideways ROM Cartridge system which can be seen to the left hand side of the keyboard with its dust cover fitted in place. The basic machine has an Issue 4 motherboard and an Intel 8271 disc interface fitted.

BBC Microcomputer (Issue 4) fitted with a Viglen Sideways ROM Cartridge system

Beeb@30

I used this BBC Micro at the Beeb@30 birthday celebrations on the 25th March 2012 at ARM Holdings to i