Sinclair ZX80 / ZX81 / Z88 Forums

Enable and Disable BREAK at will. One of the most annoying things about the ZX81 is that when you BASIC program is running anytime you press the SPACE key it will cause a BREAK your BASIC program. I've been working on this for awhile and I've come up with a method to be able to disable or enable th...

after getting a right kick in the ass needed for the CGC, I have decided to do something a little different However, my program keeps getting either an error 5, 2 or B. I have no idea what is going on. I increased the ram to 32k, still had an issue. Tried CONT, still had an issue. The program WAS s...

mrtinb wrote: ↑Mon Jun 10, 2024 6:46 am In Forth, everything in parenthesis is a comment, like REM in Basic. I'm sure that is written in the book.

thanks for the help guys

wanted to ask about an update on the book. I think you should put in detailed type ins. Maybe some forth examples. You're very talented and it would be nice to see your process to help newbies.

what was the hardest game you ever made for this forum. What was your process like?

I'm reading the Jupiter ace manual on redefining graphics and this segment has me stumped: https://k1.spdns.de/Vintage/Sinclair/80/Jupiter%20Ace/Manual/Jupiter%20Ace%204000%20Forth%20Programming.pdf (page 71) I define GR as stated : GR ( 8 row numbers, ASCII code ` ) <--- confused about this bit 8 *...

the zx81 has inkey$ for reading the keyboard and for arrow movement. how was this accomplished on the zx80?

was the zx80/81 ever used for businesses or other areas of the workforce? is there any evidence of this? did magazines ever cover it?

curious as to what you would think

thank you moggy