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  Syntax:   name SEGMENT [align] [READONLY] [combine] [use] ['class']
              statements
            name ENDS
 
  See also: ENDS, ASSUME, GROUP, ALIGN, EVEN, .386, .DOSSEG, .MODEL,
            @CurSeg, OPTION READONLY, OPTION SEGMENT
 
  Description:
 
     Defines a program segment called <SegName> with optional segment
     attributes: align, READONLY, combine, use, and class. These
     attributes give the linker and assembler information on how to set
     up, combine, and refer to segments. A segment can be reopened within
     a module by specifying the same <name> in a later SEGMENT statement.
 
     The SEGMENT directive automatically saves any segment definition
     that is already in effect. When the assembler encounters a closing
     ENDS, it restores the saved segment definition.
 
     Parameter      Description
 
     name           Name of the segment being defined. You can use the
                    @CurSeg macro function with the ENDS directive to
                    terminate the current segment.
 
     align          BYTE, WORD (2 bytes), DWORD (4), PARA (16), or PAGE
                    (256). Aligns segment to boundary. PARA is the
                    default.
 
     combine        PRIVATE, PUBLIC, STACK, COMMON, MEMORY, or AT
                    address. Defines how the linker combines segments.
                    PRIVATE is the default.
 
     use            USE16, USE32, or FLAT. Selects the segment word size.
                    See: ◄OPTION SEGMENT►
 
     READONLY       Makes segment read-only. The assembler will generate
                    an error if an instruction explicitly modifies a
                    segment marked with the READONLY attribute. Useful
                    for protected-mode code segments and segments in ROM.
 
     class          A class name (such as CODE or DATA). Must be enclosed
                    in quotation marks. Used to associate segments with
                    different names and to control segment order. Code
                    segments should have class 'CODE'.
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