Pointer Types and Function Pointers

the following table shows data pointer sizes depending on memory model and __far, __near, or __linear keyword usage:

Table 1. Data Pointer Sizes
Memory Model	Compiler Option	Default Pointer Size	__near Pointer Size	__far Pointer Size	__linear Pointer Size
SMALL	-Ms (default)	2	1	2	3
TINY	-Mt	1	1	2	3
Banked	-Mb	2	2	2	3

Function pointer size is always two bytes for SMALL and TINY memory models, and three bytes for Banked memory model.