The SW3 is for adjusting the multiplier
SW2 is for bus speed and vcore adjustment
Most I could get to recognize was 272megs with a 256meg PC133 stick(kingston I think) and the 16meg onboard
The Instant Internet 100 was renamed in later revisions the Connectivity 100.....there are a ton of revisions of the device as I have an older Instant Internet 100 which has an ISA slot and a 486 powering it.
I had running in mine (passive heatsink) K6-2 380 oc'd to 400mhz(4x mult with 100mhz FSB).
As for the VGA connector I made a working one....basically need the R, G, B, H-sync, V-sync, and a ground. The pins going the long way go 1,2,3...ect
I haven't gotten any PS/2 ports working on the device
USB didn't get the chance, power surge through the cable modem took out one of the interfaces so it's sitting in a closet now.
The watchdog is just a small wire you cut so when your running a non-nortel/bay networks OS it doesn't reboot 20 seconds after power on. It is a bare wire near the CPU socket...if looking from the front of the device just before the CPU socket.....almost looks like it's not there.
There's two sets of blank ports.....one looked like an additional RS-232 port and the other which is closer to the power supply is either USB....might if lucky or PS/2 maybee.