IA-16

IA-16 refers to Intel Architecture, 16-bit

The 16-bit chips established the x86 lineage, and were mostly code compatible with the progenitors of the family, the IA-8 8-bit chips.

The members of this family were

• 8086 16-bit with 20-bit memory addressing
• 8088 hybrid 8-bit external / 16-bit internal data bus with 20-bit memory addressing
• 80186 16-bit with 20-bit memory addressing
• 80188 hybrid 8-bit external / 16-bit internal data bus with 20-bit memory addressing
• 80286 16-bit with 24-bit memory addressing

They all used the same math coprocessor (FPU), the 8087 (usually, or less likely, a variant)

• 8087
• 80187, a pin-repackaged version of the 8087
• 80287, a sped up and pin-repackaged version of the 8087

The 16-bit chips were replaced by the ubiquitous IA32 family of 32-bit chips.

The principal competitors of these chips were the 16-bit/32-bit hybrid early 68k processors

• Motorola 680x0

See also

• x86
• x86–64
• IA-4
• IA-8
• IA-16
• IA-32
• IA-64