Restoring an Apple II+ - Help w/ random jumper?

[Bartmaster1234]

Hi,

Apparently there is no forum for legacy Apple computers, so I'll just post it here.
I have an Apple II+ I'm restoring, and I found this random jumper cable connecting the motherboard to a single pin on a ROM socket. (The wire in question is the seemingly randomly placed red wire.)

Is this important? What is it's function? I want to clean under the mobo but I'm afraid to unplug it, lol.

More pictures: http://imgur.com/0977Wlx, http://imgur.com/5UErEQG, http://imgur.com/3XQ2U5Z, http://imgur.com/adGejwB

 

[jruschme]

I believe that is what is called the "Shift Key Mod", a common mod of the period.

 

[mrichmon]

Looks like the Shift Key Mod. The purpose is to provide support for lower-case characters in certain word-processing applications.

Details are here: http://stason.org/TULARC/pc/apple2/faq/15-001-How-do-I-do-the-Shift-Key-Mod.html#.VZi_tjhVhBc

 

[redheeler]

Apparently there is no forum for legacy Apple computers, so I'll just post it here.

There is, actually. Apple Collectors