Sub-routine in CBMBasic and ACME 6502 assembly to turn on any pixel in C64 high resolution mode.
| File | Description |
|---|---|
| plot.asm | ACME assembly code for plot routine |
| plot-line.asm | Plotting lines with ACME assembler routine |
| plot-joystick.asm | Joystick movements plot points across the screen |
| plot.bas | CBM Basic code for plot routine (slow) |
In high resolution bit map mode, the Commodore 64 programmer has access to all 320x200 pixels on the screen. However, these pixels are still arranged in 8x8 character blocks and plotting a specific point requires a complex calculation that makes high resolution graphics impractical for BASIC programmers.
The code for the clear and fill routine is adapted to ACME crossassembler from Commodre 64/128 Assembly Language Programming (Mark Andrews).
The code for the plot routine is adapted from Advanced Macine Code Programming for the Commodore 64 (Stephenson & Stephenson).