Dataman 48XP - Manual (Page 30)

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In this mode, “X” refers to a blown fuse, and “-“ refers to
an intact fuse. The purpose of the buttons are as follows:
Radix
This button controls the display of the memory address in
Hex/Decimal format, if the address is currently displayed
in decimal format, clicking this button will convert and
display the address in Hex.
Fill
This option is used to fill a block of memory with a 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 selecting PLD)
Menu Device / Modify vector
Hot Key Alt-V
This command is only available when a PLD has been selected
as the active device, the option is used to modify the vectors