Memory Map Documentation
PCM Buffer
| Function |
Address |
| PCM Voice Buffer (High Byte) |
0xDF00 |
| PCM Voice Buffer (Low Byte) |
0xDF01 |
If you want to write to both, write low byte first
Voice Generators
| Voice |
Volume |
Waveform |
Phase |
Frequency (High Byte, write last) |
Frequency (Low Byte) |
| Voice 0 |
0xDF02 |
0xDF03 |
0xDF04 |
0xDF05 |
0xDF06 |
| Voice 1 |
0xDF07 |
0xDF08 |
0xDF09 |
0xDF0A |
0xDF0B |
| Voice 2 |
0xDF0C |
0xDF0D |
0xDF0E |
0xDF0F |
0xDF10 |
Display Controls
| Display |
Address |
| Display A |
0xDF12 |
| Display B |
0xDF13 |
| Display C |
0xDF14 |
| Display D |
0xDF15 |
| Display E |
0xDF16 |
| Display F |
0xDF17 |
| Display G |
0xDF18 |
| Display H |
0xDF19 |
Switch Inputs
| Switch Bank |
First 2 rows Address |
Last 2 rows Address |
| Switches A |
0xDF20 |
0xDF21 |
| Switches B |
0xDF22 |
0xDF23 |
| Switches C |
0xDF24 |
0xDF25 |
| Switches D |
0xDF26 |
0xDF27 |
GPU Memory
- Base Address:
0xEF00
- Size:
160 × 160 pixels
- End Address:
0xEF00 + (160 × 160) = GPU_END
- Color Encoding:
- Red: Bits
[7:5] scaled (0-7 → 0-255)
- Green: Bits
[4:2] scaled (0-7 → 0-255)
- Blue: Bits
[1:0] scaled (0-3 → 0-255)
- Pixels are stored in a texture-compatible
RGBA8888 format.
Memory Operations
