What is this unused port for on A1200 mobo?

[mike-]

I was looking at this recently too, i had the a1200 open in front of me for a few days so it was inevitable, while looking inside i wanted to put a 25 or was it 30 mhz 020 and a fpu in there after a while, but it would require some hefty modification. as the cpu/fpu is 16 mhz, but it runs at 14, the only crystal in there is 28, which is also used to sync the video signal.

[mike-]

rkauer

No not a 16 mhz on no, a 25 mhz, the one in there is 16.  =)

Looking at the schematics now, breaking the pin 5 connection and put a faster crystal in there might work.  

[mike-]

Looks like commodore had plans to slap a 030 in there too. i saw something that looked like jumper configurations on one page there, "System configuration bits" and the 1 1 config would allow a 030>14mhz