Controlling Lan-C/Control-L-capable VCR With Linux?

An unnamed assailant writes: "I want to do a real nerdy project: My VCR has a plug in the back for a LAN-C/Control-L cable which connects to a serial port on a computer as well as a LAN-C connection on a camcorder. The VCR also came with some simple software to control a VCR and a camera through the cable. This was obviously before nonlinear editing was as common as it is now. Anyway, I want to see if there's any way to figure out what the codes are that the protocol uses so I can talk to the VCR using perl. Any suggestions?" Now this would be a great project, even (or especially?) without the whiz-bang eyecandy of B2K. There are a lot of middle- and high-schools with LAN-C equipped VCRs (most of which probably never get used that way), and it would be nice to be able to control them this way.