====== FB-SSID (Stereophonic-SID) ======

This page contains the most essential parts of the {{:base:fb-ssid-rev1a1.pdf|FB-SSID manual}} for revision 1A1 of the hardware.

The FB-SSID is compatible with both Commodore 64 and Commodore 128 computers and is available in two versions. One is designed to support a 12Volt 6581 SID while the other is designed for a 9Volt 8580 SID. A pass-through cartridge slot is also included intended for use with the Prophet64 cartridge. However, other cartridges like the Epyx Fastloader may also function when plugged into this slot.

The FB-SSID includes an 8-way DIP switch and IO1/IO2 jumper used to configure the memory address of the FBSSID. The default memory address is $DE00.

Pin 8 of the DIP switch is the one closest to the edge of the circuit board. Pin 1 of the DIP switch is the one closest to the SID chip.


^  Jumper (JP1)  ^  8-way DIP Switch              ^  FB-SSID Address  ^
| Pins 1-2    | Pin 1 down, other pins up | $DEE0           |
| Pins 1-2    | Pin 2 down, other pins up | $DEC0           |
| Pins 1-2    | Pin 3 down, other pins up | $DEA0           |
| Pins 1-2    | Pin 4 down, other pins up | $DE80           |
| Pins 1-2    | Pin 5 down, other pins up | $DE60           |
| Pins 1-2    | Pin 6 down, other pins up | $DE40           |
| Pins 1-2    | Pin 7 down, other pins up | $DE20           |
| Pins 1-2    | Pin 8 down, other pins up | $DE00           |
| Pins 2-3    | Pin 1 down, other pins up | $DFE0           |
| Pins 2-3    | Pin 2 down, other pins up | $DFC0           |
| Pins 2-3    | Pin 3 down, other pins up | $DFA0           |
| Pins 2-3    | Pin 4 down, other pins up | $DF80           |
| Pins 2-3    | Pin 5 down, other pins up | $DF60           |
| Pins 2-3    | Pin 6 down, other pins up | $DF40           |
| Pins 2-3    | Pin 7 down, other pins up | $DF20           |
| Pins 2-3    | Pin 8 down, other pins up | $DF00           |

DO NOT change the DIP switch settings when the Commodore computer is powered on. Always turn the computer OFF before selecting the required configuration.