DUAL TOS Adapter pcb to plug into C070789 style STFM machines. This board typically allows TOS102 & TOS104 to be used on normal C070789 style machines and TOS104 & TOS206 when used with a suitable decoder board. Board should be soldered into the motherboard otherwise the height in the sockets may not allow the shielding to fit correctly. PCB is sold as seen in the image. TOS is selectable by a jumper on the board (not supplied) with header pins #0158), or can be fitted with a toggle switch if required, item #0010. You also need header pins item #0132 and DUALTOS ROM.

This board only fits C070789 & C103253 style motherboards (or motherboards with alike ROM layout) see these examples. C103253 C070789