This code appears in the following versions (click to see it in the source code): 6502 Second Processor and Master Code variations between these versions are shown below. Name: logL Type: Variable Category: Maths (Arithmetic) Summary: Binary logarithm table (low byte) Byte n contains the low byte of: 32 * log2(n) * 256 .logL SKIP 1 FOR I%, 1, 255 B% = INT(&2000 * LOG(I%) / LOG(2) + 0.5) EQUB B% MOD 256 NEXT