xenium: Double read/write banking selection

Ryzee119 · Mar 22, 2024 · d3d6cdb · d3d6cdb
1 parent a9df318
commit d3d6cdb
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/lib/xenium/xenium.c b/lib/xenium/xenium.c
@@ -18,10 +18,14 @@ static uint8_t _io_input(uint16_t address) {
 
 // IO CONTROL INTERFACE
 static inline void xenium_set_bank(uint8_t bank) {
-    uint8_t reg = _io_input(XENIUM_REGISTER_BANKING);
+    uint8_t reg;
+    // Double read/write for extra sanity
+    reg = _io_input(XENIUM_REGISTER_BANKING);
+    reg = _io_input(XENIUM_REGISTER_BANKING);'
     reg &= 0xF0;
     reg |= bank & 0x0F;
     _io_output(XENIUM_REGISTER_BANKING, reg);
+    _io_output(XENIUM_REGISTER_BANKING, reg);
 }
 
 static inline uint8_t xenium_get_bank() {