SC501 is a 7-slot backplane designed for Z50Bus.

Cards can be placed in any socket, the position and order does not usually matter. However, there are a few exceptions.

• Cards using Z80 mode 2 interrupts need to be grouped together with the highest priority interrupting device to the left (as illustrated above). These cards are linked by a daisy-chain which is incorporated into the backplane. As a result you must not leave an empty slot between any cards generating interrupts.

• Simple Compact Flash storage cards that essentially connect directly to the processor bus sometimes need to be in a socket near to the processor or they can be unreliable.