git.y1.nz

commit e141c7d10cbc01128a65744974ae6733f66706ee
parent 821a395fd7f090f56824992e65e113173de88eeb
Author: Toxa <untoxa@mail.ru>
Date:   Mon, 25 Jan 2021 18:34:54 +0300

DISABLE_OAM_DMA/ENABLE_OAM_DMA/SET_SHADOW_OAM_ADDRESS

Diffstat:
M
gbdk-lib/include/gb/gb.h
16
++++++++++++++++

1 file changed, 16 insertions(+), 0 deletions(-)
diff --git a/gbdk-lib/include/gb/gb.h b/gbdk-lib/include/gb/gb.h
@@ -987,6 +987,22 @@ extern volatile struct OAM_item_t shadow_OAM[];
 */
 __REG _shadow_OAM_base;
 
+/** Disable OAM DMA copy each VBlank
+*/
+#define DISABLE_OAM_DMA \
+    _shadow_OAM_base = 0
+
+/** Enable OAM DMA copy each VBlank and set it to transfer default shadow_OAM array
+*/
+#define ENABLE_OAM_DMA \
+    _shadow_OAM_base = (UBYTE)((UWORD)&shadow_OAM >> 8)
+
+/** Enable OAM DMA copy each VBlank and set it to transfer any 256-byte aligned array
+*/
+inline void SET_SHADOW_OAM_ADDRESS(void * address) {
+    _shadow_OAM_base = (UBYTE)((UWORD)address >> 8);
+}
+
 /** Sets sprite number __nb__ to display tile number __tile__.
 
     @param nb    Sprite number, range 0 - 39

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