The logic board, the central circuit board of the computer, is based on the Macintosh SE design. Its size, however, was reduced using surface-mount technology to 9 × 5 inches (23 × 13 cm), half the size of the SE board. This redesign, and the absence of expansion slots, kept manufacturing costs low. This lack of expansion abilities, along with the small screen size and Macintosh's popularity in desktop publishing, led to such oddities as video displays that connected through the SCSI port by users seeking to connect a larger full- or dual-page display to their Mac. The Classic design was used once more in 1991 for the Classic II, which succeeded the Classic.
The logic board, the central circuit board of the computer, is based on the Macintosh SE design. Its size, however, was reduced using surface-mount technology to 9 × 5 inches (23 × 13 cm), half the size of the SE board. This redesign, and the absence of expansion slots, kept manufacturing costs low. This lack of expansion abilities, along with the small screen size and Macintosh's popularity in desktop publishing, led to such oddities as video displays that connected through the SCSI port by users seeking to connect a larger full- or dual-page display to their Mac. The Classic design was used once more in 1991 for the Classic II, which succeeded the Classic