- Two banks of static ram. Each bank can take either 4x512KB AS6C4008 or (if you like soldering SMDs) 4x2MB CY62167ELL. The BIOS will autodetect the amount of memory present. Max memory possible in the two banks is therefore 16MB.
- XR68C681 Duart. Two independent serial ports. _See the note below about the PS/2 keyboard and mouse._
- CompactFlash interface
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- MC68230 PI/T. Provides two banks of 8-bit I/O and a timer counter, with an external 10MHz clock.
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- MC68230 PI/T. Provides two banks of 8-bit I/O and a timer counter, driven by an external 10MHz clock.
- DS1307 Real time clock with battery backup.
- PS/2 keyboard and mouse interfaces. If you use these, they will tie up the second port on the duart. The PS/2 signals are decoded by an on-board ATMega328 and passed to the main processor via channel B on the duart. Jumpers will need to be set accordingly.