8550
The "Nifty 50"

Microprocessor: Intel 80286 (16 bit)  10 Mhz, one wait state 68 pin PGA
Coprocessor: socket for optional i80287 math coprocessor 40 pin DIP, .600 wide

16-bit MCA (Micro Channel) 3 slots available for external devices, one slot internal for the DBA controller. Slot 3 has the AVE for use with 8514/A video adapters.

Memory Min/Max on system board: 1MB (expandable to 7MB with memory options)
RAM: DRAM (2 x PS/2 30-pin 512kb module) approx. 150ns w.parity. 
ROM: 128kb 
Cache: n/a

Power supply: 94w, 110-220VAC auto sense 
Weight: 9.55 kg (21 lbs)
Dimensions (HxWxD): (140 x 360 x 420mm)
 

Drive bays: 3 3.5" half-height One used by 1.44MB floppy. Card edge connector on -021.
Floppy Disk: 1.44MB 3.5 inch half-height
Hard disk 20MB 3.5 x 1.6 in  80ms ST-506 PS/2 model 50 connector
Video- On board VGA 320x200, 256 colours 640x480, 16 colours
 

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