From e2eab7f4081e7706b2e834c91690a8f310c4d4b6 Mon Sep 17 00:00:00 2001
From: ekeeke31 <ekeeke31@fcb46045-4337-0410-a722-cd382f7ce8f6>
Date: Wed, 27 Jan 2010 07:14:45 +0000
Subject: [PATCH] defined HVC tables as 'const' for some optimization (?)

---
 source/hvc.h | 20 ++++++++++----------
 source/vdp.h | 14 +++++++-------
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/source/hvc.h b/source/hvc.h
index c23134b..8a74083 100644
--- a/source/hvc.h
+++ b/source/hvc.h
@@ -124,7 +124,7 @@
 #define _HVC_H_
 
 /* V counter values for NTSC 192-line display */
-uint8 vc_ntsc_192[262] = {
+const uint8 vc_ntsc_192[262] = {
   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
@@ -145,7 +145,7 @@ uint8 vc_ntsc_192[262] = {
 };
 
 /* V counter values for NTSC 224-line display */
-uint8 vc_ntsc_224[262] = {
+const uint8 vc_ntsc_224[262] = {
   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
@@ -166,7 +166,7 @@ uint8 vc_ntsc_224[262] = {
 };
 
 /* V counter values for NTSC 240-line display (invalid mode) */
-uint8 vc_ntsc_240[262] = {
+const uint8 vc_ntsc_240[262] = {
   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
@@ -187,7 +187,7 @@ uint8 vc_ntsc_240[262] = {
 };
 
 /* V counter values for PAL 192-line display */
-uint8 vc_pal_192[313] = {
+const uint8 vc_pal_192[313] = {
   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
@@ -212,7 +212,7 @@ uint8 vc_pal_192[313] = {
 };
 
 /* V counter values for PAL 224-line display */
-uint8 vc_pal_224[313] = {
+const uint8 vc_pal_224[313] = {
   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
@@ -237,7 +237,7 @@ uint8 vc_pal_224[313] = {
 };
 
 /* V counter values for PAL 240-line display */
-uint8 vc_pal_240[313] = {
+const uint8 vc_pal_240[313] = {
   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
@@ -276,7 +276,7 @@ uint8 vc_pal_240[313] = {
 /*                                                             */
 /***************************************************************/
 
-uint8 cycle2hc40[3420] = 
+const uint8 cycle2hc40[3420] = 
 {  
   /* end of active display (16 pixels -> 128 Mcycles) , HINT triggered , Vcounter jump */
   0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 
@@ -513,7 +513,7 @@ uint8 cycle2hc40[3420] =
   0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 
 };
 
-uint8 cycle2hc32[3420] = 
+const uint8 cycle2hc32[3420] = 
 {  
   /* end of active display (16 pixels -> 160 Mcycles) , HINT triggered ? , Vcounter jump */
   0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 
@@ -751,8 +751,8 @@ uint8 cycle2hc32[3420] =
   0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 
 };
 
-uint8 *vctab;
-uint8 *hctab;
+const uint8 *vctab;
+const uint8 *hctab;
 
 #endif /* _HVC_H_ */
 
diff --git a/source/vdp.h b/source/vdp.h
index 125340d..b20bfb2 100644
--- a/source/vdp.h
+++ b/source/vdp.h
@@ -65,13 +65,13 @@ extern uint8 odd_frame;
 extern uint8 vdp_pal;
 extern uint16 lines_per_frame;
 
-extern uint8 *vctab;
-extern uint8 *hctab;
-extern uint8 vc_ntsc_224[262];
-extern uint8 vc_pal_224[313];
-extern uint8 vc_pal_240[313];
-extern uint8 cycle2hc32[3420];
-extern uint8 cycle2hc40[3420];
+extern const uint8 vc_ntsc_224[262];
+extern const uint8 vc_pal_224[313];
+extern const uint8 vc_pal_240[313];
+extern const uint8 cycle2hc32[3420];
+extern const uint8 cycle2hc40[3420];
+extern const uint8 *vctab;
+extern const uint8 *hctab;
 
 /* Function prototypes */
 extern void vdp_init(void);