libtonc: BIOS informalities

Tonclib

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BIOS informalities
[Bios Calls]


Data Structures

struct  BUP
 BitUpPack ( for swi 10h). More...
struct  MultiBootParam
 Multiboot struct. More...

SoftReset flags

#define ROM_RESTART   0x00
 Restart from ROM entry point.
#define RAM_RESTART   0x01
 Restart from RAM entry point.

RegisterRamReset flags

#define RESET_EWRAM   0x0001
 Clear 256K on-board WRAM.
#define RESET_IWRAM   0x0002
 Clear 32K in-chip WRAM.
#define RESET_PALETTE   0x0004
 Clear Palette.
#define RESET_VRAM   0x0008
 Clear VRAM.
#define RESET_OAM   0x0010
 Clear OAM. does NOT disable OBJs!
#define RESET_REG_SIO   0x0020
 Switches to general purpose mode.
#define RESET_REG_SOUND   0x0040
 Reset Sound registers.
#define RESET_REG   0x0080
 All other registers.
#define RESET_MEM_MASK   0x001F
 Clear 256K on-board WRAM.
#define RESET_REG_MASK   0x00E0
 Clear 256K on-board WRAM.
#define RESET_GFX   0x001C
 Clear all gfx-related memory.

Cpu(Fast)Set flags

#define CS_CPY   0
 Copy mode.
#define CS_FILL   (1<<24)
 Fill mode.
#define CS_CPY16   0
 Copy in halfwords.
#define CS_CPY32   (1<<26)
 Copy words.
#define CS_FILL32   (5<<24)
 Fill words.
#define CFS_CPY   CS_CPY
 Copy words.
#define CFS_FILL   CS_FILL
 Fill words.

ObjAffineSet P-element offsets

#define BG_AFF_OFS   2
 BgAffineDest offsets.
#define OBJ_AFF_OFS   8
 ObjAffineDest offsets.

Decompression routines

#define BUP_ALL_OFS   (1<<31)
#define LZ_TYPE   0x00000010
#define LZ_SIZE_MASK   0xFFFFFF00
#define LZ_SIZE_SHIFT   8
#define HUF_BPP_MASK   0x0000000F
#define HUF_TYPE   0x00000020
#define HUF_SIZE_MASK   0xFFFFFF00
#define HUF_SIZE_SHIFT   8
#define RL_TYPE   0x00000030
#define RL_SIZE_MASK   0xFFFFFF00
#define RL_SIZE_SHIFT   8
#define DIF_8   0x00000001
#define DIF_16   0x00000002
#define DIF_TYPE   0x00000080
#define DIF_SIZE_MASK   0xFFFFFF00
#define DIF_SIZE_SHIFT   8

Multiboot modes

#define MBOOT_NORMAL   0x00
#define MBOOT_MULTI   0x01
#define MBOOT_FAST   0x02

Defines

#define swi_call(x)   asm volatile("swi\t"#x"<<16" ::: "r0", "r1", "r2", "r3")
 BIOS calls from C.

Define Documentation

#define swi_call ( x   )     asm volatile("swi\t"#x"<<16" ::: "r0", "r1", "r2", "r3")

BIOS calls from C.

You can use this macro in a C BIOS-call wrapper. The wrapper should declare the flags, then this call will do the rest.

Parameters:
x Number of swi call (THUMB number)
Note:
It checks the __thumb__ #define to see whether we're in ARM or THUMB mode and fixes the swi number accordingly. Huzzah for the C proprocessor!

Generated on Mon Aug 25 17:03:57 2008 for libtonc by  doxygen 1.5.3

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