Sinclair ZX80 / ZX81 / Z88 Forums

1024MAK wrote: ↑Tue Mar 19, 2024 4:28 pm The internal ROM function that converts a floating point number to a string is almost certainly the same routine that converts it for printing to the screen.

Mark

You can delete the "almost"

I just ordered 20 for europe.
If no one is offering for UK I'm willing to send there too. No sending to rest of the world.
Prices when I received them.

Of that I'm not Shure.
But if mazogs didn't work without altering then it doesn't look into the systemvariable LASTK (which inkey does) but either uses the ROM call or own routines.

Inkey can only use single keys. But the ROM reads the keyboard by eight IN commands. Each can have five keys detected which makes the 40 keys. Games can do the same. But even with inkey you can use more directions. If the game takes T for up and V for down, F for left and G for right then R might be...

Joy81 is no miracle and we can make new boards if you're interested (or others as well)
It also offers multiple key presses and diagonal keys not only up and down.

As long as games use the inkey equivalent they don't need to be rewritten. That's what zxpand offers to the zeddy or otherwise it's own API.
Joy81 on the other hand implemented the exact keyboard behaviour and so games need not be rewritten.

JOY81 - Programmable Joystick Interface for ZX81
Can be found in this forum.
https://www.sinclairzxworld.com/viewtop ... ilit=Joy81

I'm not Shure. Two or three posts.
Don't worry, I read them anyway
It just takes some time if I am at work.

My wife told me to dump everything I hadn't touched within two years.
Now she is my ex wife

There is always a little uncertainty which port needs to be connected to which cassette recorder connector