[CharlesH]

The DVR 1-2 switch doesn't have any 'hex code'. It doesn't send a signal, it is is an internal switch that changes the code page in the remote itself. Think of the TiVo peanut as two remotes in one body. Each remote can be set to a unique code page, which is that the addresses 0-9 indicate. All the switch does it tell the remote which identity to behave as.

It took me a while to realize that the "1" and "2" on the remote have nothing to do with which code page is used on that setting. The "1" setting can send code page 6, and the "2" setting can send code page 1. The default code page is "0", which is the "wild card" page, which TiVos will accept regardless of their setting.