Ironically I was there at he same time, trash 80 bought in 1979 (still have it as a reminder) and read the same magazines, the joys of soldering upgrades to the solder tracks designed for the expansion interface as it was the cheapest way of upgrading, piggybacking a 1k static ram chip to give the 8th bit for display and having lower case letters. Funny how people can read the same article in the same magazine and see different words. Took me three months to disassemble the o/s Rom so I could integrate Z80 machine code extensions to extend it's capability. Now i prefer tools that just do the job, minimum of fuss, maximum productivity.