The A3010.

• 1024k Memory (upgradable to 4096k)
• Advanced Disc Filing System by default with High Density drives.
• ARM 250 processor
• 2 Atari Joystick ports
• 12 MHz RAM.
• 2048k OS in ROM.
• ~7.2 MIPS

The above details are taken from the Comp.Sys.Acorn FAQ by Philip R. Banks.