From eafb95c558d157dbdba0546a2888fa4c1dec8aa5 Mon Sep 17 00:00:00 2001
From: RichardG867 <richardg867@gmail.com>
Date: Fri, 1 Aug 2025 20:35:22 -0300
Subject: [PATCH] CMD64x: Fix I/O mapping of the onboard CMD648

---
 src/disk/hdc_ide_cmd646.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/disk/hdc_ide_cmd646.c b/src/disk/hdc_ide_cmd646.c
index 052871a7d..7929db53a 100644
--- a/src/disk/hdc_ide_cmd646.c
+++ b/src/disk/hdc_ide_cmd646.c
@@ -570,6 +570,12 @@ cmd646_reset(void *priv)
 
         dev->regs[0x50] = 0x40;       /* Enable Base address register R/W;
                                          If 0, they return 0 and are read-only 8 */
+
+        /* Blank base addresses */
+        dev->regs[0x10] = 0x01;
+        dev->regs[0x14] = 0x01;
+        dev->regs[0x18] = 0x01;
+        dev->regs[0x1c] = 0x01;
     } else {
         dev->regs[0x06] = 0x80;
         dev->regs[0x09] = dev->local; /* Programming interface */