by Rainer Buchty, edited by Noah Vawter
Disclaimer: If you're crazy enough to try this, you're probably in a home somewhere, so you don't have any ability to sue! ha hah aha
The ESQ-1 is similar to its big brother SQ80, it just lacks the floppy drive/controller and mapper (single D-type flipflop) which switches between DOSRAM and SEQRAM. Also it comes with only 8kB of SEQRAM but easily can be expanded to 64kB of SEQRAM.
From the OS's point of view they are almost identical, I had a quick look inside ESQ-1 OS V3.5 and recognized almost all routines I knew from the SQ80 OS V1.8.