Hi Matt Yes they are the one for the 800, plugs into the original 6520 Socket, with the additional 6520 placed alongside, towards the Pokey, forces the use of PokeyMAX for stereo the board has space for an additional 6520/6821 plus additional decoder out lines, and All the Portlines. Port A, B, CA, CB But you will be limited to only the address spaces in the D3xx range excluding D300-D30F (original 6520) And addresses D380-D3FF as I believe Incognito uses these for some of it's additional features. As I've used 16Byte blocks you can add an additional 7 devices, (128Bytes of space /16Bytes = 8 blocks minus one for original 6520) One additional 6520 on board if wanted leaving 6 mounted elsewhere. The 74LS138 which used to reside on the personality board has been replaced with a surface mount chip on the Incognito, you could still solder to this for D600, D700 but not sure if they are used, certainly D100 is used by the CF card interface. The 800XL, 1200XL, 65/130XE all designed to plug into the original LS138 socket, adding a very small board with an additional 138, you can select which address block you wish to decode with this. Default D3xx but need a wire jumper or DuPont connectors to change.