(...) PROGRESS REPORT: Problem persists when I try to download the SREC file for a (successfully compiled) slightly larger program (~30 lines) given on p200 of Knudson's book. (25 years ago, 27-Nov-99, to lugnet.robotics.rcx.legos)
(...) Just because it compiled, and is from a book, does not mean it is compiled correctly. Once again, please try and load the LEGO firmware using all of the tools. Once this works, grab a known good alternate SRECORD file like Kekoa's little LCD (...) (25 years ago, 27-Nov-99, to lugnet.robotics.rcx.legos)