Sinclair ZX80 / ZX81 / Z88 Forums

I can't speak to the ZX81plus38 specifically, but would advise caution with "new" cassette recorders from Amazon and friends. They tend to have newer features like stereo pickup and transfer to SD card or a USB thumbdrive. Nothing wrong with that of course, but at the same time they've eliminated vi...

Not to sound like I'm complaining, (my hat is off to Dr. Beep and all of you for producing these games), but there's an element of "Battleship" in its various forms that is missing, ever since Milton-Bradley stole the idea from navy folks after the 2nd World War. Before computers, and before Milton-...

Hi DeLorean_4. I'm also in Canada, (Waterloo Ontario), and think I have a spare. I'm traveling at the moment, but I'll look when I get home. PM me and we can arrange it. Cheers.
Ian

That looks cool. I'd could be interested in one of those.

I only suggest this because I've made this mistake. Double-check that you've got the transistor wired the correct way around. (I was amazed at how well the circuit works when I finally discovered my flub.)

I can think of one thing it definitely might be,... there are "fake" memory devices (SD cards, thumbdrives) floating around out there, particularly on fleaBay. The memory addresses are "wrapped", i.e. later addresses point to the same actual locations as early previous addresses. The device will rep...

Yes indeed--congratulations! (I would have killed for that handsome real keyboard back in the day,...)

Another use of the 48-64K area I just remembered. My "model" program contains a routine called FLASHOUT, which copies in its entirety the normal 16-32K program area to the higher one. Why? Sometimes during development, programs crash. (I know I know,... this may come as a shock,...) Murphy's Law dic...

BUT... I'm reading about Hi-Res graphics... and ... well... if there's going to be no real benefit, then I won't and stick at the 16K... but I'd be interested to hear thoughts please. For what it's worth (maybe not a lot), here's what I did with the 2nd non-contiguous 16K of the 32K version of the ...

I'm not qualified to answer your question, having shamefully never opened Z80 assembly. But I will follow this thread with interest for another reason. Tiny BASIC intrigues me because I have a Sanyo PHC-20, which is a rare bird natively housing only an "extended" version of Tiny BASIC. I find it qui...