Sinclair ZX80 / ZX81 / Z88 Forums

I'll probably end up being embarassed if I post any more details on the hardware hehehe. I designed it with 3 x 8255 for digital I/O and a pair of ADC0809 for analog inputs. I made up a plant control panel with anunciators, and had all the outputs running, at least enough to show the university pan...

yes, yes, this must be the case. it seems to have extra values in the memory dump. very clever yet easily defeatable if you just print the variables.... :D anyway here is the program if anyone is interested. it asks for year and month and prints the month calendar. i had this proggy back in 1983 but...

hi sinclair friends, i had some fun tonight by keying in a commercial zx81-tk82c program into the spectrum emulator. calendario from brazilian microdigital. the program was all correct but refused to work properly. by debugging the variables, i discovered some initial variables had a different value...

I have identified the remaining ringo programs and they are from engesoft zorbax tape.
So, not worth working on them since you already have that in your page.

Sds

This is great! Yes, I probably loaded them and saved with my 16k expansion on, so there may be some extra stuff. I wish I had copies of Tutor and Calendario... I also have some recordings made with Ringo, higher speed. I tried them in eightyone which emulates it but I had success in only 2 dumb test...

Hi Kelly Murta, Yes, I know your page, great collection of information and BR software. I'm trying to recover Demolidor and Marciano to add to the collection, I found them saved in some old tapes. (saw that you already did that, thanks!) I also have the original tape of Tutor de Matematica and Calen...

Hello all, I`ve been trying to recover some programs from old tapes and had success in some. There are a couple of programs that I still had no success, I wonder if someone from here could take a look and maybe help. These are 2 brazilian localization games from Microdigital, probably for 2Kb machin...

Hello sinclair users! My first computer was a sinclair zx81 clone from Brazil back in 1983. It had 2Kb internal memory and later I added the 16K expansion so the computer could be more useable. Back then 16K looked like a lot of memory! It was a TK82C from Microdigital. Some time later I got a 48K T...