From: Tobias Girstmair <tobi@isticktoit.net>
Date: Thu, 4 Mar 2021 14:02:27 +0000 (+0100)
Subject: new version
X-Git-Url: https://git.gir.st/Chiptunes-pms150c.git/commitdiff_plain/88d59159408f71e65445d7d7376799302d85ec6e

new version
---

diff --git a/bsv.c b/bsv.c
index 678e5af..2fd4ac4 100644
--- a/bsv.c
+++ b/bsv.c
@@ -13,11 +13,25 @@ u8 notes[] = {
 	0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58
 };
 
-u8 mod3hi, mod3lo;
+u8 mod3hi, mod3lo; //MEM
+u8 xmod3(u8,u8);
 void mod3(void) {
-	acc = (mod3hi<<8|mod3lo) % 3;
+	acc = xmod3(mod3hi, mod3lo);
 }
 
+u8 xmod3(u8 hi, u8 lo) { //avail: t, o _
+//copied from attiny version e98ab46; based on homepage.divms.uiowa.edu/~jones
+    unsigned short a = ((hi) + (lo)) &0x1ff;
+        hi = a>>8; //1 bit
+        lo = a;
+    lo = (hi<<4|lo>>4) + (lo & 0xF);
+    lo = (lo >>  2) + (lo & 0x3);
+    lo = (lo >>  2) + (lo & 0x3);
+    if (lo > 2) lo = lo - 3;
+    return lo;
+}
+
+
 void g(void){
 	u8 notes_ix = acc & 0x7;
 	if(3&i2)