The LAVA Parallel Bi-directional has been a Lava product since 1984. Since that time, the board has gone through relatively few design changes.
Other than gaining an 8-bit bi-directional mode, it is functionally identical to the original Lava Parallel.
In the fast-moving world of computer hardware, that might be some sort of a record!
The board has been hailed as the most reliable bi-directional product on the market with the widest range of operating system support.