X-Git-Url: https://git.gir.st/Chiptunes-pms150c.git/blobdiff_plain/8a26e9766326f9cc4adc53a0554b625126b9e463..ac66812d47f5f54cddb729dd5b7c24f2dd1eaece:/bsv.c

diff --git a/bsv.c b/bsv.c
index 0b9d3b3..fff89f3 100644
--- a/bsv.c
+++ b/bsv.c
@@ -1,6 +1,7 @@
 typedef unsigned char u8;
 
 int i;
+u8 i0, i1, i2, i3;
 
 u8 notes[] = {
 	0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58,
@@ -8,7 +9,9 @@ u8 notes[] = {
 };
 
 u8 g(u8 x, u8 t, u8 o){
-	u8 notes_ix = t%8 + 8*!!(3&i>>16);
+	u8 notes_ix = t & 0x7;
+	if(3&i2)
+		notes_ix += 8;
 	u8 result = (i*notes[notes_ix])>>o;
 	result &= x;
 	result &= 3;
@@ -16,10 +19,11 @@ u8 g(u8 x, u8 t, u8 o){
 }
 void main(void){
 	i = 0;
+	i0 = i1 = i2 = i3 = 0;
 	for(;;) {
 		u8 sample;
-		u8 n = i >> 14;
-		u8 s = i >> 17;
+		u8 n = i2<<2 | i1>>6;
+		u8 s = i3<<7 | i2>>1;
 		sample = g(1,n,12);
 		{ u8 tmp = n^i>>13;
 		sample += g(s,tmp,10);
@@ -33,6 +37,11 @@ void main(void){
 		sample += g(tmp1,tmp2,9);
 		} //tmp1, tmp2
 		putchar(sample<<4);
+
 		i++;
+		i0++;
+		i1 += !i0;
+		i2 += !i1 && !i0;
+		i3 += !i2 && !i1 && !i0;
 	}
 }