During the introduction to 6502 assembly language lecture, we have first introduced with the X and Y registers and accumulator. Also, we have take a look into how to move around the bitmap and change the colour of the pixel .
In the following code, I have try to load 3 different colours into the accumulator and registers then draw 9 pixels into the bitmap as an excise on how to move the pixels around.
Result
Source Code
LDA #01 LDX #07 LDY #03 STA $0200 STX $020f STY $021f STA $0400 STX $040f STY $041f STA $05e0 STX $05f0 STY $05ff Opcode
LDA: LoaD Accumulator
LDX: LoaD X register
LDY: LoaD Y register
STA: STore Accumulator
STX: STore X register
STY: STore Y register
Top comments (0)