Oh, here seems to be a typo in the paper: one-byte exponent ranging from -218 to +127

This should be -128 to +127.

Actual article title doesn’t do it justice “ I have found an excellent programmer named Steve Wozniac”. This article links to a Dr Dobbs Journal (DDJ) submission where woz posted floating point routines done with a 6502. 6502 is such as simple instruction set. Amazing to see this work at all - much less at speed …