Assembly Programming

I see you are using a headerless ROM. If you had a header, the A9 0A bytes would not be found at that address, but at C1/66FF (you need to add +200 because of the header).

Anyone can go and change those bytes, what I wanted you to notice was if you saw anything peculiar between using bytes 0A and 0B?
What is the difference between displaying the offset in Hi-ROM and in Standard (Linear)?

You also probably figured already that the 0A byte you're changing is in a hexadecimal base, and that it translates to 10 in decimal base. 0B in hexadecimal translates to 11 in decimal, and so on.

You need to be comfortable changing regular numbers (100, 200, 234) that are in a decimal base into numbers in a hexadecimal base. How do you change 100, 200 and 234 into their Hex counterparts?