I wonder if someone can help me, please?

I'm looking for a simple piece of 6502 code for the BBC that does the following:
- looks to see if I have pressed the keyboard...
- recognises that I've pressed "1" on the keyboard
- goes to a particular mem location if I have pressed "1"
- if nothing is pressed, RTS

Does that make sense?

I want to add a small piece of code somewhere in a game so that when I press "1" it gives me infinite lives.

If the OS is still functional, then OS Byte 129 is your man

If you can't use the OS routine then this describes how to read the hardware directly: http://www.retrosoftware.co.uk/wiki/index.php/Reading_the_keyboard_by_direct_hardware_access

Cheers guys. I'm not really sure what I'm supposed to do, but I'll try and work it out from what you've given me.

OS Byte is a routine at $fff4 which takes an argument in the accumulator. It returns the key code in the X register:
The key code for "1" is 49, so this is the value that you need to compare the X register against: If the contents of the register matches then branch to your code elsewhere; otherwise return: I hope that 1) I'm not spoon-feeding someone who already knows their 6502, and 2) I've got the above code more-or-less correct.

That's exactly what I needed. Thank you

It's kind of similar to the Commodore 64. I just needed to know the correct locations.

Thank you.