Disassembly and commentary for the TMS320C32 DSP BIS Engine routines that calculate total signal power in decibels (TOTPOW) and 95th percentile spectral edge frequency in Hz (SEF). A small bug, shown in boldface, is present at 8FA72C, which causes nonsensical spectral edge frequencies to be returned if there is no signal power present (i.e. a perfectly isoelectric EEG).