TSOP 48 adapters, Yamaichi and Wells ZIF versions update 15-9-2003
  
  The tsop 48 adapter supports 29F(LV) and 28F tsop 48 chips and
  compatibles (like the AT49LVXXXX or 58FVBXXX) that can be programmed in BYTE mode

                  

                   These are top load ZIF's:
                   put the chip in the ZIF from above.
                   push both load buttons together, the chip will be centered.
                   release both buttons together, the contact strips should get on 
                   the chip pins (lay on the horizontal ends)

                   Use a magnifying-glass to check when needed.
                 
                      

   Remember TSOP chips are not designed to be used in a ZIF.
                   
                   select 29F and/or Vpp,close jumper for 5/4.2 Volt operation,leave open for 3.3 Volt.
                   
                   29F(LV)800 connect A19 to A19 on programmer board
                   29F(LV)160 connect A19 and A20 to A19 and A20 on programmer board
                   29F(LV)320 connect A19,A20 and A21 to A19,A20 and A21 on programmer board
                   It's easiest to use a 3 way connector cable (comes with the adapter)
 
  
                   http://yamaichi.us.phtemp.com/pdf/t&b/ic191_tsop.pdf
 
                   http://www.wellscti.com/catalog/series648.pdf