DOS Fn 2eH: Set/Reset Verify Switch

                                                         Compatibility: 1.0+ 
 Expects: AH    2eH
          AL    0 to turn verify OFF
                1 to turn verify ON
          DL    0 (need for DOS 1.x and 2.x only)
          ──────────────────────────────────────────────────────────────────
 Returns: none
          ──────────────────────────────────────────────────────────────────
    Info: Selects whether DOS should verify (check the CRC▲ on) each sector
          after it is written to disk.

          This slows down disk write operations, but it ensures maximum
          data integrity.

          DOS Fn 54H returns the current DOS verify status.

   Notes: ■ The Verify flag is a system-global setting.  If you change it,
            you should restore the original value before exiting.

See Also: Fn 54H (get verify
          Disk Drive Functions
          DOS Functions
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