A third-party plug-in card with a 386 was also available.
The optional tape drives of the 2645 model were interfaced via another plug-in card.
A backplane uses plug-in cards for storage and processing.
At this time most other computers used plug-in internal cards to add connections for peripherals.
Two processor piggyback plug-in cards were built, but were never used as more than faster 68020's.
Sound functionality can also be integrated onto the motherboard, using basically the same components as a plug-in card.
The best plug-in cards, which use better and more expensive components, can achieve higher quality than integrated sound.
An expansion card cage was available as an option, allowing more plug-in cards.
Sound cards are special plug-in cards that greatly enhance the effects of many game and educational programs.
Both machines add memory through plug-in cards in increments of one or two megabytes.
