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PSP overlay header raw notes
Luciano Ciccariello edited this page May 3, 2024
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1 revision
I am not sure if this header is specific of Castlevania Dracula X Chronicles or is it generated by the MetroWerk compiler. The magic code MWo3 suggests something along the lines of MetroWerk overlay v3, but it is all speculation.
Each overlay header is 0x80 bytes long. The first Overlay is dra.bin, identified as Overlay ID 0x01.
4D57 6F33 3900 0000 0076 2E09 144C 0000 | MWo39...........
2C12 0000 0005 0000 80D4 2E09 80D4 2E09 | ................
7474 5F30 3030 2E62 696E 0000 0000 0000 | tt_000.bin......
0000 0000 0000 0000 0000 0000 0000 0000 | ................
0000 0000 0000 0000 0000 0000 0000 0000 | ................
0000 0000 0000 0000 0000 0000 0000 0000 | ................
0000 0000 0000 0000 0000 0000 0000 0000 | ................
0000 0000 0000 0000 0000 0000 0000 0000 | ................
| Offset | Name | Example |
|---|---|---|
| 0x00 | Magic code | 0x336F574D |
| 0x04 | Overlay ID | 0x39 |
| 0x08 | Load address | 0x092E7600 |
| 0x0C | .text section size? | 0x4C14 |
| 0x10 | .data section size? | 0x122C |
| 0x14 | .bss section size? | 0x500 |
| 0x18 | .bss section begin? | 0x092ED480 |
| 0x1C | .bss section begin? | 0x092ED480 |
| 0x20 | Overlay name | tt_000.bin |