Differences

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--- flash_layout [2024/11/20 00:38] – arisotura
+++ flash_layout [2025/01/19 20:42] (current) – garyodernichts
@@ Line 42: / Line 42: @@
   - If the UIC state is 7, the diagnostics firmware is loaded
-  - Otherwise, the byte at 0xF000 indicates which firmware partition to load from: 0 = 0x1000000, 1 = 0x5000000
+  - Otherwise, the byte at 0xF000 indicates which firmware partition to load from: 0 = 0x100000, 1 = 0x500000
@@ Line 91: / Line 91: @@
 ^ Offset ^ Length ^ Description ^
-| 0x00   | 4      | Resource ID |
+| 0x00   | 2      | Resource type
+  Bitmap = 0
+  Sound = 1
+  Unknown = 2
+|
+| 0x02   | 2      | Resource ID |
 | 0x04   | 4      | Data offset (relative to the start of resource data) |
 | 0x08   | 4      | Data length |
-| 0x0C   | 4      | Resource type |
+| 0x0C   | 12     | Parameters |
-| 0x10   | 4      | Parameter 1 |
-| 0x14   | 4      | Parameter 2 |
-There are two possible resource types: 0x00000008 for bitmap data and 0x00100000 for sound data.
+For bitmap data, the following parameters are used:
-For bitmap data, parameters 1 and 2 are respectively the width and height of the bitmap. The data starts with 256 32-bit ARGB palette entries, followed by 8-bit paletted bitmap data.
+^ Offset ^ Length ^ Description ^
+| 0x00   | 4      | ??? (Format / BPP)? Always 8. |
+| 0x04   | 4      | Width |
+| 0x08   | 4      | Height |
-For sound data, it isn't clear what parameters 1 and 2 mean. Parameter 2 is related to the data length. The data itself seems to be PCM16 samples.
+The data starts with 256 32-bit ARGB palette entries, followed by 8-bit paletted bitmap data.
+For sound data, the following parameters are used:
+^ Offset ^ Length ^ Description ^
+| 0x00   | 2      | ??? (Format)? |
+| 0x02   | 2      | Bits per sample? Always 16. |
+| 0x04   | 4      | Channels? Always 1. |
+| 0x08   | 4      | Frequency |
+The data itself are PCM samples.
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