@Fonefixer - Thanks for the update, that is good to know.
@Trashcooky - So is your 'build number' (in >settings>about device>) showing as = 97F1-D1-H1-H01-1291-20111128
If so that is a newer version of fw - but the one that seems to be better (at the mo' - more testing been done) is 97F1-D1-H1-H01-1291-20111122 (which is an older FW)
P.S. I started out with a ZX81 too, with that massive 16kb ram block.








