Yes, most Basics had peek and poke commands with which you could read and write specific memory locations. For example - parentheses may or may net be needed, depending on the Basic implementation:
X = PEEK( 123 )
would read the byte at memory location 123 and store its value in X. Then
POKE( 123, 42 )
would change the byte at 123 to be 42.
But these didn't normally have so much to do with patching executables to add/change functionality.
alt Hacker News
Yes, most Basics had peek and poke commands with which you could read and write specific memory locations. For example - parentheses may or may net be needed, depending on the Basic implementation:
would read the byte at memory location 123 and store its value in X. Then would change the byte at 123 to be 42.But these didn't normally have so much to do with patching executables to add/change functionality.