1 files changed, 18 insertions, 0 deletions

diff --git a/src/gba/gba.h b/src/gba/gba.h
index be7a305..f726b72 100644
--- a/src/gba/gba.h
+++ b/src/gba/gba.h
@@ -452,6 +452,24 @@ int bios_vblank_wait();
 int bios_div(int num, int denom);
 
 //
+// SIO Link Cable
+//
+
+#define SIO_MODE *((vu16*)(MEM_IO + 0x0134))
+#define SIO_CNT  *((vu16*)(MEM_IO + 0x0128))
+
+#define SIO_MODE_GP     (2 << 14)
+#define SIO_SC(X)       ((X) << 0)
+#define SIO_SD(X)       ((X) << 1)
+#define SIO_SI(X)       ((X) << 2)
+#define SIO_SO(X)       ((X) << 3)
+#define SIO_SC_OUT(X)   ((X) << 4)
+#define SIO_SD_OUT(X)   ((X) << 5)
+#define SIO_SI_OUT(X)   ((X) << 6)
+#define SIO_SO_OUT(X)   ((X) << 7)
+#define SIO_IRQ_ENABLE  (1 << 8)
+
+//
 // Sound.
 //