It was possible to expand your Act Sirius 1 via several expansion options. Generally all used at least one expansion slot located on the motherboard. There are only four expansion slots available making for difficult decisions on expansion. Should you already have memory cards and/or a hard disk installed this could limit options.

Below are detailed some of the expansion options that were available.

Time Keeping

• 'Simon' Clock Card


• 'Issue' Clock Card

Memory Expansion

• 'Issue' 512k RAM Card