correct Fx55 and fx6 opcodes

2 files changed, 5 insertions, 12 deletions

diff --git a/chip8.c b/chip8.c
index 748cca4..7c966ed 100644
--- a/chip8.c
+++ b/chip8.c
@@ -341,26 +341,19 @@ chip8_cycle()
 		case 0x55: /* LD [I], Vx (store registers V0 through Vx starting at memory location I) */
 		{
 			// TODO: not tested
-			int reg = 0;
-			do
+			for(int i = 0; i <= x; ++i)
 			{
-				memory[I+reg] = V[reg];
-				reg++;
+			    memory[I + i] = V[i];
 			}
-			while (reg <= V[x]);
 			break;
 		}
 		case 0x65: /* LD Vx, [I] (read registers V0 through Vx from memory starting at I) */
 		{
 			// TODO: not tested
-			int reg = 0;
-			int target = V[x];
-			do
+			for(int i = 0; i <= x; ++i)
 			{
-				V[reg] = memory[I+reg];
-				reg++;
+			    V[i] = memory[I + i];
 			}
-			while (reg < target);
 			break;
 		}
 			break;
diff --git a/main.c b/main.c
index ae6f34d..b00d5b2 100644
--- a/main.c
+++ b/main.c
@@ -205,7 +205,7 @@ int main(int argc, char *argv[])
 
 	init_video();
 
-	const int fps = 500;
+	const int fps = 900;
 	const int frame_delay = 1000/fps;
 	uint32_t  frame_start;
 	uint32_t frame_time;