cards for the eMate. Most cards expanded the data bus from 16 bits to 32 bits, as well as providing additional DRAM (program memory), and flash (storage). When one of these cards was installed, the internal DRAM was disabled, but the internal flash RAM is combined with the flash on the card. For example: If a memory card were to have 4 MB of DRAM and 2 MB of flash, the Newton would report having 4 MB of flash, and 4 MB of DRAM, not 5 MB of DRAM.

In addition to the expansion slot, the eMate also featured a single non-CardBus PCMCIA