Sinclair ZX80 / ZX81 Forums

Hello Crayon, your programm can't work properly anyway, it is not a problem of amount of memory :| I think you should take a look at the programing manual so you could use correctly variables, input command or conditions (IF, THEN....). Here is an online manual http://www.worldofspectrum.org/ZX81Bas...

Hi, seems that the file is missing

Hello
what to say after that ? They said (and they know !) much more than i am able to

So just the essential for me, welcome on board !

If needed take a look again at this post https://www.sinclairzxworld.com/viewtop ... 0&start=10.

If you are more 'visual' here is the classic 'screen map' of the ZX81 with coordinates using PRINT (beginning UPleft) and those using PLOT (beginning BOTTOM left)

Hello Crayon ;) , is your file the full one ? I only see 41 lines in the listing and many variables used have not been defined (CHANCE, BIG MOMMA...) so you will have some ERROR 2. Also you use the PLOT command with low coordinates so when you use a simple PRINT command after that, it will print AFT...

Welcome !
Nice work.
Do you plan to pimp also the memory by using ferrite core memory ?
Try to use 2x 512 bytes ferrite core memory module as used in an old CDC 6600 to remplace the 1ko buid-in memory of the ZX ?

Kalos irthes
Your QL had UK ROM or a dedicated Greek ROM ? In France we had a French ROM (full of bugs....)

Dim

Hello, had you some contact with them by mail before ordering the kit ? As the initial site is not online currently and the mirror site you mentioned if from 2006, i wonder if there is someone to sell the kit anymore ?

Yes, variables (x, y, a...) are not defined in this version. May be it is the wrong tzx file ?

Hello Kpalser,

I don't find many things in my archives but does this schematic is of any help in your research ?
It shows some differences between ZON x-81 and Zon-X boards.