Reference: ZX81 BASIC "Peek" Function

Question

I need a way to find if the character ('<') hit the wall (black pixel art)

-On the game ZX81.

I am looking at another game ... that uses code

if peek(peek 16398 +256*peek 16399) = code "**blackpixel graphic**" then ...

Which seems to work for them ...

Is this the correct code?

I don’t know with the addresses and get the memory and stuff.

Please help me...

-If you know the best way. Please reply:)

Thank,

Answer 1

peekreads a byte in a memory location. According to the Sinclair ZX81 System Variables , the memory location 16398and 16399form a 16-bit value containing the current "PRINT Address" position in the displayed file. "

, peek 16398 + 256*peek 16399 16- peek, () / (?) .

Answer 2

16398 16399 , . (. http://web.ukonline.co.uk/sinclair.zx81/chap28.html). ,

peek 16398 + 256*peek 16399

, . , -, PRINT AT.

peek(peek 16398 + 256*peek 16399)

. .

, : ? , .

Answer 3

, , peek " ?"

.