Document N64DD data buffer

Author: GabrielRavier

include/n64dd.h

@@ -155,7 +155,7 @@ extern vu8 D_80121214;
 
 extern s32 (*D_801D2E54)(struct_801E0D18*);
 
-extern u8 B_801DC000[];
+extern u8 gN64DDDiskReadTemporaryBuffer[];
 
 extern s32 D_801D2E90;
 extern OSMesgQueue* B_801E0D10[2];

src/n64dd/n64dd_data_buffer.c

@@ -1,4 +1,6 @@
 #include "n64dd.h"
 
-// Buffer used for reading from the disk?
-u8 B_801DC000[0x4D10];
+// Buffer used during the process of reading from the disk
+// Used to directly read individual LBAs/blocks from the disk before copying to the final destination
+// As blocks/LBAs are read directly into this buffer from the disk, it has to be 16-byte aligned
+ALIGNED(16) u8 gN64DDDiskReadTemporaryBuffer[MAX_BLK_SIZE];

src/n64dd/z_n64dd.c

@@ -36,7 +36,7 @@ typedef struct struct_801D9B90 {
 
 s32 func_801C7A1C(struct_801E0D18* arg0);
 
-void* D_801D2E50 = &B_801DC000;
+void* D_801D2E50 = &gN64DDDiskReadTemporaryBuffer;
 s32 (*D_801D2E54)(struct_801E0D18*) = func_801C7A1C;
 
 struct_801D9B90 B_801D9B90;