Dataman 48UXP - Manual (Page 39)

In the mode, “X” refers to blown fuse, and “-“ refers to an
intact fuse. The purpose of the buttons is as follows:
Radix
This button control the display of the memory address in
Hex/Decimal format, If the address is currently displayed
in decimal format, clicking this button will covert and
display the address in Hex.
Fill
This option is used to fill a block of memory with fuse
value. It needs the starting address, ending address and the
value to be copied into this Block of memory.
Modify Vector (only available when select
PLD)
Menu Device / Modify vector
Hot Key Alt-V
This command only available for PLD been select as an active