guS2DInitBg OK (#426)

4 files changed, 404 insertions, 1 deletions

diff --git a/include/ultra64/gs2dex.h b/include/ultra64/gs2dex.h
new file mode 100644
index 000000000..5c0bc7175
--- /dev/null
+++ b/include/ultra64/gs2dex.h
@@ -0,0 +1,379 @@
+#ifndef	GS2DEX_H
+#define	GS2DEX_H
+
+#ifdef _LANGUAGE_C_PLUS_PLUS
+extern "C" {
+#endif
+
+/*===========================================================================*
+ *	Macro
+ *===========================================================================*/
+#define	GS_CALC_DXT(line)	(((1<< G_TX_DXT_FRAC)-1)/(line)+1)
+#define	GS_PIX2TMEM(pix, siz)	((pix)>>(4-(siz)))
+#define	GS_PIX2DXT(pix, siz)	GS_CALC_DXT(GS_PIX2TMEM((pix), (siz)))
+
+/*===========================================================================*
+ *	Data structures for S2DEX microcode
+ *===========================================================================*/
+
+/*---------------------------------------------------------------------------*
+ *	Background
+ *---------------------------------------------------------------------------*/
+#define	G_BGLT_LOADBLOCK	0x0033
+#define	G_BGLT_LOADTILE		0xfff4
+
+#define	G_BG_FLAG_FLIPS		0x01
+#define	G_BG_FLAG_FLIPT		0x10
+
+/* Non scalable background plane */
+typedef	struct	{
+  u16   imageX;		/* x-coordinate of upper-left position of texture (u10.5) */
+  u16	imageW;		/* width of the texture (u10.2) */
+  s16	frameX;		/* upper-left position of transferred frame (s10.2) */
+  u16	frameW;		/* width of transferred frame (u10.2) */
+
+  u16   imageY; 	/* y-coordinate of upper-left position of texture (u10.5) */
+  u16	imageH;		/* height of the texture (u10.2) */
+  s16	frameY;		/* upper-left position of transferred frame (s10.2) */
+  u16	frameH;		/* height of transferred frame (u10.2) */
+
+  u64  *imagePtr;	/* texture source address on DRAM */
+  u16	imageLoad;	/* which to use, LoadBlock or  LoadTile */
+  u8	imageFmt;	/* format of texel - G_IM_FMT_*  */
+  u8	imageSiz;	/* size of texel - G_IM_SIZ_*   */
+  u16   imagePal; 	/* pallet number  */
+  u16	imageFlip;	/* right & left image inversion (Inverted by G_BG_FLAG_FLIPS) */
+
+  /* The following is set in the initialization routine guS2DInitBg(). There is no need for the user to set it. */
+  u16	tmemW;		/* TMEM width and Word size of frame 1 line.
+                           At LoadBlock, GS_PIX2TMEM(imageW/4,imageSiz)
+                           At LoadTile  GS_PIX2TMEM(frameW/4,imageSiz)+1 */
+  u16	tmemH;		/* height of TMEM loadable at a time (s13.2) 4 times value
+			   When the normal texture, 512/tmemW*4
+			   When the CI texture, 256/tmemW*4 */
+  u16	tmemLoadSH;	/* SH value
+			   At LoadBlock, tmemSize/2-1
+			   At LoadTile, tmemW*16-1 */
+  u16	tmemLoadTH;	/* TH value or Stride value
+			   At LoadBlock, GS_CALC_DXT(tmemW)
+			   At LoadTile, tmemH-1 */
+  u16	tmemSizeW;	/* skip value of imagePtr for image 1-line
+			   At LoadBlock, tmemW*2
+                           At LoadTile, GS_PIX2TMEM(imageW/4,imageSiz)*2 */
+  u16	tmemSize;	/* skip value of imagePtr for 1-loading
+			   = tmemSizeW*tmemH                          */
+} uObjBg_t;		/* 40 bytes */
+
+/* Scalable background plane */
+typedef	struct	{
+  u16   imageX;		/* x-coordinate of upper-left position of texture (u10.5) */
+  u16	imageW;		/* width of texture (u10.2) */
+  s16	frameX;		/* upper-left position of transferred frame (s10.2) */
+  u16	frameW;		/* width of transferred frame (u10.2) */
+
+  u16   imageY; 	/* y-coordinate of upper-left position of texture (u10.5) */
+  u16	imageH;		/* height of texture (u10.2) */
+  s16	frameY;		/* upper-left position of transferred frame (s10.2) */
+  u16	frameH;		/* height of transferred frame (u10.2) */
+
+  u64  *imagePtr;	/* texture source address on DRAM */
+  u16	imageLoad;	/* Which to use, LoadBlock or LoadTile? */
+  u8	imageFmt;	/* format of texel - G_IM_FMT_*  */
+  u8	imageSiz;	/* size of texel - G_IM_SIZ_*  */
+  u16   imagePal; 	/* pallet number */
+  u16	imageFlip;	/* right & left image inversion (Inverted by G_BG_FLAG_FLIPS) */
+
+  u16	scaleW;		/* scale value of X-direction (u5.10) */
+  u16	scaleH;		/* scale value of Y-direction (u5.10) */
+  s32	imageYorig;	/* start point of drawing on image (s20.5) */
+
+  u8	padding[4];
+
+} uObjScaleBg_t;	/* 40 bytes */
+
+typedef union {
+  uObjBg_t        b;
+  uObjScaleBg_t   s;
+  long long int   force_structure_alignment;
+} uObjBg;
+
+/*---------------------------------------------------------------------------*
+ *	2D Objects
+ *---------------------------------------------------------------------------*/
+#define	G_OBJ_FLAG_FLIPS	1<<0		/* inversion to S-direction */
+#define	G_OBJ_FLAG_FLIPT	1<<4		/* nversion to T-direction */
+
+typedef struct {
+  s16  objX;		/* s10.2 OBJ x-coordinate of upper-left end */
+  u16  scaleW;		/* u5.10 Scaling of u5.10 width direction   */
+  u16  imageW;		/* u10.5 width of u10.5 texture (length of S-direction) */
+  u16  paddingX;	/* Unused - Always 0 */
+  s16  objY;		/* s10.2 OBJ y-coordinate of s10.2 OBJ upper-left end */
+  u16  scaleH;		/* u5.10 Scaling of u5.10 height direction */
+  u16  imageH;		/* u10.5 height of u10.5 texture (length of T-direction) */
+  u16  paddingY;	/* Unused - Always 0 */
+  u16  imageStride;	/* folding width of texel (In units of 64bit word) */
+  u16  imageAdrs;	/* texture header position in TMEM (In units of 64bit word) */
+  u8   imageFmt;	/* format of texel - G_IM_FMT_* */
+  u8   imageSiz;	/* size of texel - G_IM_SIZ_* */
+  u8   imagePal;	/* pallet number (0-7) */
+  u8   imageFlags;	/* The display flag - G_OBJ_FLAG_FLIP* */
+} uObjSprite_t;		/* 24 bytes */
+
+typedef union {
+  uObjSprite_t      s;
+  long long int   force_structure_alignment;
+} uObjSprite;
+
+/*---------------------------------------------------------------------------*
+ *	2D Matrix
+ *---------------------------------------------------------------------------*/
+typedef struct {
+  s32   A, B, C, D;     /* s15.16 */
+  s16   X, Y;           /* s10.2  */
+  u16   BaseScaleX;	/* u5.10  */
+  u16   BaseScaleY;	/* u5.10  */
+} uObjMtx_t;		/* 24 bytes */
+
+typedef union {
+  uObjMtx_t	m;
+  long long int force_structure_alignment;
+} uObjMtx;
+
+typedef struct {
+  s16   X, Y;           /* s10.2  */
+  u16   BaseScaleX;	/* u5.10  */
+  u16   BaseScaleY;	/* u5.10  */
+} uObjSubMtx_t;		/* 8 bytes */
+
+typedef union {
+  uObjSubMtx_t	m;
+  long long int force_structure_alignment;
+} uObjSubMtx;
+
+/*---------------------------------------------------------------------------*
+ *	Loading into TMEM
+ *---------------------------------------------------------------------------*/
+#define	G_OBJLT_TXTRBLOCK	0x00001033
+#define	G_OBJLT_TXTRTILE	0x00fc1034
+#define	G_OBJLT_TLUT		0x00000030
+
+#define	GS_TB_TSIZE(pix,siz)	(GS_PIX2TMEM((pix),(siz))-1)
+#define	GS_TB_TLINE(pix,siz)	(GS_CALC_DXT(GS_PIX2TMEM((pix),(siz))))
+
+typedef	struct	{
+  u32	type;		/* G_OBJLT_TXTRBLOCK divided into types */
+  u64	*image;		/* texture source address on DRAM */
+  u16	tmem;		/* loaded TMEM word address (8byteWORD) */
+  u16	tsize;		/* Texture size, Specified by macro GS_TB_TSIZE() */
+  u16	tline;		/* width of Texture 1-line, Specified by macro GS_TB_TLINE() */
+  u16	sid;		/* STATE ID Multipled by 4 (Either one of  0, 4, 8 and 12) */
+  u32	flag;		/* STATE flag  */
+  u32	mask;		/* STATE mask  */
+} uObjTxtrBlock_t;		/* 24 bytes */
+
+#define	GS_TT_TWIDTH(pix,siz)	((GS_PIX2TMEM((pix), (siz))<<2)-1)
+#define	GS_TT_THEIGHT(pix,siz)	(((pix)<<2)-1)
+
+typedef	struct	{
+  u32	type;		/* G_OBJLT_TXTRTILE divided into types */
+  u64	*image;		/* texture source address on DRAM */
+  u16	tmem;		/* loaded TMEM word address (8byteWORD)*/
+  u16	twidth;		/* width of Texture (Specified by macro GS_TT_TWIDTH()) */
+  u16	theight;	/* height of Texture (Specified by macro GS_TT_THEIGHT()) */
+  u16	sid;		/* STATE ID Multipled by 4 (Either one of  0, 4, 8 and 12) */
+  u32	flag;		/* STATE flag  */
+  u32	mask;		/* STATE mask  */
+} uObjTxtrTile_t;		/* 24 bytes */
+
+#define	GS_PAL_HEAD(head)	((head)+256)
+#define	GS_PAL_NUM(num)		((num)-1)
+
+typedef	struct	{
+  u32	type;		/* G_OBJLT_TLUT divided into types */
+  u64	*image;		/* texture source address on DRAM */
+  u16	phead;		/* pallet number of load header (Between 256 and 511) */
+  u16	pnum;		/* loading pallet number -1 */
+  u16   zero;		/* Assign 0 all the time */
+  u16	sid;		/* STATE ID Multipled by 4 (Either one of  0, 4, 8 and 12)*/
+  u32	flag;		/* STATE flag  */
+  u32	mask;		/* STATE mask  */
+} uObjTxtrTLUT_t;		/* 24 bytes */
+
+typedef union {
+  uObjTxtrBlock_t      block;
+  uObjTxtrTile_t       tile;
+  uObjTxtrTLUT_t       tlut;
+  long long int   force_structure_alignment;
+} uObjTxtr;
+
+/*---------------------------------------------------------------------------*
+ *	Loading into TMEM & 2D Objects
+ *---------------------------------------------------------------------------*/
+typedef	struct	{
+  uObjTxtr	txtr;
+  uObjSprite	sprite;
+} uObjTxSprite;		/* 48 bytes */
+
+/*===========================================================================*
+ *	GBI Commands for S2DEX microcode
+ *===========================================================================*/
+/* GBI Header */
+#ifdef	F3DEX_GBI_2
+#define	G_OBJ_RECTANGLE_R	0xda
+#define	G_OBJ_MOVEMEM		0xdc
+#define	G_RDPHALF_0		0xe4
+#define	G_OBJ_RECTANGLE		0x01
+#define	G_OBJ_SPRITE		0x02
+#define	G_SELECT_DL		0x04
+#define	G_OBJ_LOADTXTR		0x05
+#define	G_OBJ_LDTX_SPRITE	0x06
+#define	G_OBJ_LDTX_RECT		0x07
+#define	G_OBJ_LDTX_RECT_R	0x08
+#define	G_BG_1CYC		0x09
+#define	G_BG_COPY		0x0a
+#define	G_OBJ_RENDERMODE	0x0b
+#else
+#define	G_BG_1CYC		0x01
+#define	G_BG_COPY		0x02
+#define	G_OBJ_RECTANGLE		0x03
+#define	G_OBJ_SPRITE		0x04
+#define	G_OBJ_MOVEMEM		0x05
+#define	G_SELECT_DL		0xb0
+#define	G_OBJ_RENDERMODE	0xb1
+#define	G_OBJ_RECTANGLE_R	0xb2
+#define	G_OBJ_LOADTXTR		0xc1
+#define	G_OBJ_LDTX_SPRITE	0xc2
+#define	G_OBJ_LDTX_RECT		0xc3
+#define	G_OBJ_LDTX_RECT_R	0xc4
+#define	G_RDPHALF_0		0xe4
+#endif
+
+/*---------------------------------------------------------------------------*
+ *	Background wrapped screen
+ *---------------------------------------------------------------------------*/
+#define	gSPBgRectangle(pkt, m, mptr)  gDma0p((pkt),(m),(mptr),0)
+#define	gsSPBgRectangle(m, mptr)      gsDma0p(     (m),(mptr),0)
+#define	gSPBgRectCopy(pkt, mptr)      gSPBgRectangle((pkt), G_BG_COPY, (mptr))
+#define	gsSPBgRectCopy(mptr)	      gsSPBgRectangle(      G_BG_COPY, (mptr))
+#define	gSPBgRect1Cyc(pkt, mptr)      gSPBgRectangle((pkt), G_BG_1CYC, (mptr))
+#define	gsSPBgRect1Cyc(mptr)	      gsSPBgRectangle(      G_BG_1CYC, (mptr))
+
+/*---------------------------------------------------------------------------*
+ *	2D Objects
+ *---------------------------------------------------------------------------*/
+#define	gSPObjSprite(pkt, mptr)       gDma0p((pkt),G_OBJ_SPRITE,     (mptr),0)
+#define	gsSPObjSprite(mptr)           gsDma0p(     G_OBJ_SPRITE,     (mptr),0)
+#define	gSPObjRectangle(pkt, mptr)    gDma0p((pkt),G_OBJ_RECTANGLE,  (mptr),0)
+#define	gsSPObjRectangle(mptr)        gsDma0p(     G_OBJ_RECTANGLE,  (mptr),0)
+#define	gSPObjRectangleR(pkt, mptr)   gDma0p((pkt),G_OBJ_RECTANGLE_R,(mptr),0)
+#define	gsSPObjRectangleR(mptr)       gsDma0p(     G_OBJ_RECTANGLE_R,(mptr),0)
+
+/*---------------------------------------------------------------------------*
+ *	2D Matrix
+ *---------------------------------------------------------------------------*/
+#define	gSPObjMatrix(pkt, mptr)	      gDma1p((pkt),G_OBJ_MOVEMEM,(mptr),0,23)
+#define	gsSPObjMatrix(mptr)           gsDma1p(     G_OBJ_MOVEMEM,(mptr),0,23)
+#define	gSPObjSubMatrix(pkt, mptr)    gDma1p((pkt),G_OBJ_MOVEMEM,(mptr),2, 7)
+#define	gsSPObjSubMatrix(mptr)        gsDma1p(     G_OBJ_MOVEMEM,(mptr),2, 7)
+
+/*---------------------------------------------------------------------------*
+ *	Loading into TMEM
+ *---------------------------------------------------------------------------*/
+#define	gSPObjLoadTxtr(pkt, tptr)     gDma0p((pkt),G_OBJ_LOADTXTR,   (tptr),23)
+#define	gsSPObjLoadTxtr(tptr)         gsDma0p(     G_OBJ_LOADTXTR,   (tptr),23)
+#define	gSPObjLoadTxSprite(pkt, tptr) gDma0p((pkt),G_OBJ_LDTX_SPRITE,(tptr),47)
+#define	gsSPObjLoadTxSprite(tptr)     gsDma0p(     G_OBJ_LDTX_SPRITE,(tptr),47)
+#define	gSPObjLoadTxRect(pkt, tptr)   gDma0p((pkt),G_OBJ_LDTX_RECT,  (tptr),47)
+#define	gsSPObjLoadTxRect(tptr)       gsDma0p(     G_OBJ_LDTX_RECT,  (tptr),47)
+#define	gSPObjLoadTxRectR(pkt, tptr)  gDma0p((pkt),G_OBJ_LDTX_RECT_R,(tptr),47)
+#define	gsSPObjLoadTxRectR(tptr)      gsDma0p(     G_OBJ_LDTX_RECT_R,(tptr),47)
+
+/*---------------------------------------------------------------------------*
+ *	Select Display List
+ *---------------------------------------------------------------------------*/
+#define	gSPSelectDL(pkt, mptr, sid, flag, mask)	\
+{	gDma1p((pkt), G_RDPHALF_0, (flag), (u32)(mptr) & 0xffff, (sid)); \
+	gDma1p((pkt), G_SELECT_DL, (mask), (u32)(mptr) >> 16, G_DL_PUSH); }
+#define	gsSPSelectDL(mptr, sid, flag, mask)	\
+{	gsDma1p(G_RDPHALF_0, (flag), (u32)(mptr) & 0xffff, (sid)); \
+	gsDma1p(G_SELECT_DL, (mask), (u32)(mptr) >> 16, G_DL_PUSH); }
+#define	gSPSelectBranchDL(pkt, mptr, sid, flag, mask)	\
+{	gDma1p((pkt), G_RDPHALF_0, (flag), (u32)(mptr) & 0xffff, (sid)); \
+	gDma1p((pkt), G_SELECT_DL, (mask), (u32)(mptr) >> 16, G_DL_NOPUSH); }
+#define	gsSPSelectBranchDL(mptr, sid, flag, mask)	\
+{	gsDma1p(G_RDPHALF_0, (flag), (u32)(mptr) & 0xffff, (sid)); \
+	gsDma1p(G_SELECT_DL, (mask), (u32)(mptr) >> 16, G_DL_NOPUSH); }
+
+/*---------------------------------------------------------------------------*
+ *	Set general status
+ *---------------------------------------------------------------------------*/
+#define	G_MW_GENSTAT	0x08	/* Note that it is the same value of G_MW_FOG */
+
+#define	gSPSetStatus(pkt, sid, val)	\
+	gMoveWd((pkt), G_MW_GENSTAT, (sid), (val))
+#define	gsSPSetStatus(sid, val)	\
+	gsMoveWd(      G_MW_GENSTAT, (sid), (val))
+
+/*---------------------------------------------------------------------------*
+ *	Set Object Render Mode
+ *---------------------------------------------------------------------------*/
+#define	G_OBJRM_NOTXCLAMP	0x01
+#define	G_OBJRM_XLU		0x02	/* Ignored */
+#define	G_OBJRM_ANTIALIAS	0x04	/* Ignored */
+#define	G_OBJRM_BILERP		0x08
+#define	G_OBJRM_SHRINKSIZE_1	0x10
+#define	G_OBJRM_SHRINKSIZE_2	0x20
+#define	G_OBJRM_WIDEN		0x40
+
+#define	gSPObjRenderMode(pkt, mode)   gImmp1((pkt),G_OBJ_RENDERMODE,(mode))
+#define	gsSPObjRenderMode(mode)	      gsImmp1(     G_OBJ_RENDERMODE,(mode))
+
+/*===========================================================================*
+ *	Render Mode Macro
+ *===========================================================================*/
+#define RM_RA_SPRITE(clk)                                      \
+        AA_EN | CVG_DST_CLAMP |                                \
+        CVG_X_ALPHA | ALPHA_CVG_SEL | ZMODE_OPA | TEX_EDGE |   \
+        GBL_c##clk(G_BL_CLR_IN, G_BL_A_IN, G_BL_CLR_MEM, G_BL_1MA)
+
+#define G_RM_SPRITE		    G_RM_OPA_SURF
+#define G_RM_SPRITE2		G_RM_OPA_SURF2
+#define G_RM_RA_SPRITE  	RM_RA_SPRITE(1)
+#define G_RM_RA_SPRITE2		RM_RA_SPRITE(2)
+#define G_RM_AA_SPRITE		G_RM_AA_TEX_TERR
+#define G_RM_AA_SPRITE2		G_RM_AA_TEX_TERR2
+#define G_RM_XLU_SPRITE		G_RM_XLU_SURF
+#define G_RM_XLU_SPRITE2	G_RM_XLU_SURF2
+#define G_RM_AA_XLU_SPRITE	G_RM_AA_XLU_SURF
+#define G_RM_AA_XLU_SPRITE2	G_RM_AA_XLU_SURF2
+
+/*===========================================================================*
+ *	External functions
+ *===========================================================================*/
+extern	u64	gspS2DEX_fifoTextStart[], gspS2DEX_fifoTextEnd[];
+extern	u64	gspS2DEX_fifoDataStart[], gspS2DEX_fifoDataEnd[];
+extern	u64	gspS2DEX_fifo_dTextStart[], gspS2DEX_fifo_dTextEnd[];
+extern	u64	gspS2DEX_fifo_dDataStart[], gspS2DEX_fifo_dDataEnd[];
+extern	u64	gspS2DEX2_fifoTextStart[], gspS2DEX2_fifoTextEnd[];
+extern	u64	gspS2DEX2_fifoDataStart[], gspS2DEX2_fifoDataEnd[];
+extern	u64	gspS2DEX2_xbusTextStart[], gspS2DEX2_xbusTextEnd[];
+extern	u64	gspS2DEX2_xbusDataStart[], gspS2DEX2_xbusDataEnd[];
+extern	void	guS2DInitBg(uObjBg *);
+
+#ifdef	F3DEX_GBI_2
+# define guS2DEmuBgRect1Cyc	guS2D2EmuBgRect1Cyc	/*Wrapper*/
+# define guS2DEmuSetScissor	guS2D2EmuSetScissor	/*Wrapper*/
+  extern void	guS2D2EmuSetScissor(u32, u32, u32, u32, u8);
+  extern void	guS2D2EmuBgRect1Cyc(Gfx **, uObjBg *);
+#else
+  extern void	guS2DEmuSetScissor(u32, u32, u32, u32, u8);
+  extern void	guS2DEmuBgRect1Cyc(Gfx **, uObjBg *);
+#endif
+
+#ifdef _LANGUAGE_C_PLUS_PLUS
+}
+#endif
+#endif /* GS2DEX_H */
+
+/*======== End of gs2dex.h ========*/
diff --git a/include/z64.h b/include/z64.h
index 99f05d653..6af55f262 100644
--- a/include/z64.h
+++ b/include/z64.h
@@ -9,6 +9,7 @@
 #include "libc/stdlib.h"
 
 #include "ultra64.h"
+#include "ultra64/gs2dex.h"
 #include "io/controller.h"
 #include "osint.h"
 #include "os.h"
diff --git a/src/boot_O2_g3/idle.c b/src/boot_O2_g3/idle.c
index 4be8a1094..f2cded98c 100644
--- a/src/boot_O2_g3/idle.c
+++ b/src/boot_O2_g3/idle.c
@@ -1,3 +1,4 @@
+#include "prevent_bss_reordering.h"
 #include "global.h"
 
 u8 D_80096B20 = 1;
diff --git a/src/libultra/gu/guS2DInitBg.c b/src/libultra/gu/guS2DInitBg.c
index f4a2606e4..d2e5a2b04 100644
--- a/src/libultra/gu/guS2DInitBg.c
+++ b/src/libultra/gu/guS2DInitBg.c
@@ -1,3 +1,25 @@
 #include "global.h"
 
-#pragma GLOBAL_ASM("asm/non_matchings/boot/guS2DInitBg/guS2DInitBg.s")
+void guS2DInitBg(uObjBg* bg) {
+    u32 size;
+    s32 tmem = (bg->b.imageFmt == G_IM_FMT_CI) ? 0x100 : 0x200;
+    u16 shift = (6 - bg->b.imageSiz);
+
+    if (bg->b.imageLoad == G_BGLT_LOADBLOCK) {
+        bg->b.tmemW = bg->b.imageW >> shift;
+        bg->b.tmemH = (tmem / bg->b.tmemW) * 4;
+        bg->b.tmemSizeW = bg->b.tmemW * 2;
+        bg->b.tmemSize = bg->b.tmemH * bg->b.tmemSizeW;
+        bg->b.tmemLoadSH = (bg->b.tmemSize >> 1) - 1;
+        bg->b.tmemLoadTH = (0x7FF / bg->b.tmemW) + 1;
+    } else { // G_BGLT_LOADTILE
+        bg->b.tmemW = (bg->b.frameW >> shift) + 3;
+        bg->b.tmemH = (tmem / bg->b.tmemW) * 4;
+        bg->b.tmemSizeW = (bg->b.imageW >> shift) * 2;
+
+        size = bg->b.tmemH * bg->b.tmemSizeW;
+        bg->b.tmemSize = (size >> 16);
+        bg->b.tmemLoadSH = (size >> 0) & 0xFFFF;
+        bg->b.tmemLoadTH = bg->b.tmemH - 1;
+    }
+}