IBM Personal System/2 50 Technical Reference page 58

• Display modes supported by the IBM Monochrome Display and
Printer Adapter, the IBM Color/Graphics Monitor Adapter, and the
IBM Enhanced Graphics Adapter.
• The parallel printer ports (Parallel 1, Parallel 2, and Parallel 3) in
compatibility mode.
• Generally compatible with the Intel 80287 and 8087 math
coprocessors.
3-30 Model 50 System Board