Sinclair ZX80 / ZX81 / Z88 Forums

You probably worked this out already, but you only need to store one set of values for both SIN and COS because SIN X is COS(90-X) and vice versa. That might save a few bytes.

(* delurks *) Hi, for completeness here's a BASIC binary mirroring routine. I know the OP probably doesn't need this any more, but I enjoyed the challenge. 10 PRINT "INPUT WHOLE NUMBER 0 TO 255" 20 INPUT A 30 IF A<NOT PI OR A>VAL "255" OR A<>INT A THEN RUN 40 PRINT ,,A;" BINARY REVERSED IS" 100 LET ...

Thanks everyone!

Here is the ZX80 version, as I couldn't find the >= on the keyboard, I had a work-around which you'll see once you load the file. Also, it doesn't handle zero currently. According to the method that I'm employing x/0 is not infinity - it's x remainder infinity - I may add this into V2. Regards, Sha...

Hello, another newbie here. I'm from London, in my late 40s, and getting nostalgic about old computers as part of a very geeky mid-life crisis. :geek: My first computer was a ZX81, complete with wobbly rampack. (Later I upgraded to a Spectrum, then an Amstrad PCW. I basically loved anything with a Z...