Converting a ByteBlasterMV into a ByteBlaster II?

A brand new USB-Blaster from the people that make it for Altera is US$

I would thing the conversion process would be:

G.

A true ByteBlaster II is built up of discrete transistors to be able to program the really low voltage targets. The MV uses HC logic buffers. If I remember right, the II also has 2 more control lines than the MV and a slightly different pinout. Each one is also "keyed" with some unused IO pins shorted to allow detection by Quartus.

Your best bet is to build a II-clone with HC buffers. It's only a few dollars in parts. I put one on this board:

In the PDF schematic it's on the upper left. Many of the values aren't critical.

You could convert an original ByteBlaster to a ByteBlaster MV just be changing the eight-bit buffer in it (from an LS to an HC family I think). However, as others have said, the ByteBlaster II is a different beast with extra features.