From 3340a29e3d4c3775a48f6f700662f24f75f6a5f6 Mon Sep 17 00:00:00 2001
From: LMP88959 <109979235+LMP88959@users.noreply.github.com>
Date: Sun, 29 Jan 2023 15:15:40 -0800
Subject: [PATCH] Update crt_core.c

---
 crt_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crt_core.c b/crt_core.c
index 9d4b139..1687926 100644
--- a/crt_core.c
+++ b/crt_core.c
@@ -377,7 +377,7 @@ crt_demodulate(struct CRT *v, int noise)
         ypos = POSMOD(line + v->vsync + ynudge, CRT_VRES);
         pos = xpos + ypos * CRT_HRES;
         
-        ccr = v->ccf[ypos & 3];
+        ccr = v->ccf[ypos % v->cc_period];
         sig = v->inp + ln + (v->hsync & ~3); /* burst @ 1/CB_FREQ sample rate */
         for (i = CB_BEG; i < CB_BEG + (CB_CYCLES * CRT_CB_FREQ); i++) {
             int p, n;