Scratchpad RAM
An 8-bit RAM unit of 240 bytes mapped into the Intellivision memory map from 100-$1EF. The first 92 bytes are used primarily by the Executive ROM for temporary data storage, but the remaining memory is available for general use by programs.
$0100-$015C: Used by the Executive ROM for temp data storage.
$015D-$01EF: Available for general program usage.