From 5068ec8d19fb7248abfcd065e1890c85fd96566b Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Fri, 28 May 2021 22:01:07 +0200
Subject: Add SYSTEM_WAIT configuration

---
 src/common.h | 24 ++++++++++++++----------
 src/main.c   |  5 ++++-
 2 files changed, 18 insertions(+), 11 deletions(-)

(limited to 'src')

diff --git a/src/common.h b/src/common.h
index 0fe2752..12114d7 100644
--- a/src/common.h
+++ b/src/common.h
@@ -683,16 +683,6 @@ typedef enum {
     NOTE_C_8
 } Note;
 
-static const char * note_names[] =  {
-    "C2", "C#2", "D2", "D#2", "E2", "F2", "F#2", "G2", "G#2", "A2", "A#2", "B2",
-    "C3", "C#3", "D3", "D#3", "E3", "F3", "F#3", "G3", "G#3", "A3", "A#3", "B3",
-    "C4", "C#4", "D4", "D#4", "E4", "F4", "F#4", "G4", "G#4", "A4", "A#4", "B4",
-    "C5", "C#5", "D5", "D#5", "E5", "F5", "F#5", "G5", "G#5", "A5", "A#5", "B5",
-    "C6", "C#6", "D6", "D#6", "E6", "F6", "F#6", "G6", "G#6", "A6", "A#6", "B6",
-    "C7", "C#7", "D7", "D#7", "E7", "F7", "F#7", "G7", "G#7", "A7", "A#7", "B7",
-    "C8"
-};
-
 static const u32 sound_rates[] = {
     44  , 156 , 262 , 363 , 457 , 547 , 631 , 710 , 785 , 856 , 923 , 986 ,
     1046, 1102, 1155, 1205, 1252, 1297, 1339, 1379, 1416, 1452, 1485, 1517,
@@ -703,6 +693,19 @@ static const u32 sound_rates[] = {
     2016,
 };
 
+
+//
+// System control.
+//
+
+// Used to configure gamepak access timings.
+#define SYSTEM_WAIT *((vu16*)(MEM_IO + 0x0204))
+
+// This register defaults to 0, but manufacture cartridges use the values
+// provided below.
+#define SYSTEM_WAIT_DEFAULT 0
+#define SYSTEM_WAIT_CARTRIDGE 0x4317
+
 //
 // Misc.
 //
@@ -730,6 +733,7 @@ wait_vsync(void) {
 //
 // Memory section macros for devkitARM.
 //
+
 #define IWRAM_DATA __attribute__((section(".iwram")))
 #define IWRAM_CODE __attribute__((section(".iwram"), long_call, target("arm")))
 #define EWRAM_DATA __attribute__((section(".ewram")))
diff --git a/src/main.c b/src/main.c
index 7a2c397..2aa744c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -365,9 +365,12 @@ handle_input(Uxn *u) {
 
 static Uxn u;
 EWRAM_BSS
-static u8 umem[65536];
+static u8 umem[KB(65)];
 
 int main(void) {
+    // Adjust system wait times.
+    SYSTEM_WAIT = SYSTEM_WAIT_CARTRIDGE;
+
     // Initialize filesystem.
     fs_init();
 
-- 
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