Hi All,

I couldn't find any jumper settings for these motherboards on Vogons, Total Hardware 1999, Micro House Technical Library, or The Retro Web, so I created this layout and compiled a list of the jumpers. If you notice any errors, please let me know. Thanks!
The PDF version of the layout is available to download.

JP1 – Single-chip BIOS (1–2), two-chip BIOS (2–3). Pins 1 & 2 are factory solder-bridged.
JP2 – FPU input clock selection (pins 1 & 2 closed: X1 (32 MHz); pins 2 & 3 closed: Y1 (40 or 50 MHz)).
JP3 – Turbo switch.
JP4 – Only one of X1 and Y1 is populated (for a 16 MHz CPU, only one 32 MHz oscillator is required). Sometimes an unpopulated jumper header.
JP5 – Reset switch.
JP6 – Turbo LED.
JP7 – External battery (non-charging connector).
JP8 – Power LED and keylock switch.
JP9 – Speaker.
JP10 – SIMM socket-to-bank assignment (CAS_H).
JP11 – SIMM socket-to-bank assignment (CAS_L).
JP12 – SIMM socket-to-bank assignment (RAS).
JP13 – Enable CPU reset (RC) via the keyboard controller. Pins 1 & 2 are factory-bridged.
JP14 – Monitor type selection (closed: color; open: monochrome).
JP15 – Power connector P8 (6-pin).
JP16 – Power connector P9 (6-pin).
JP17 – Keyboard connector.
JP18 – Closed: clears CMOS after power-off (flips the Valid RAM and Time bit (VRT) in the RTC chip). Open: normal operation.

If you remove resistor R36, the built-in battery will not charge when the computer is on. A 3V replacement battery is not recommended, because the timekeeping is expected to be inaccurate.