From 460c8c73939364dc167b745f81d948631b2f2252 Mon Sep 17 00:00:00 2001
From: win2kgamer <47463859+win2kgamer@users.noreply.github.com>
Date: Wed, 4 Feb 2026 20:07:21 -0600
Subject: [PATCH] Headland: Make ROMCS Disable bit only affect E0000-EFFFF per
 the HT18 datasheet

---
 src/chipset/headland.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/chipset/headland.c b/src/chipset/headland.c
index 480766103..1c122e126 100644
--- a/src/chipset/headland.c
+++ b/src/chipset/headland.c
@@ -220,9 +220,10 @@ memmap_state_default(headland_t *dev, uint8_t ht_romcs)
     mem_mapping_disable(&dev->mid_mapping);
 
     if (ht_romcs)
-        mem_set_mem_state(0x0e0000, 0x20000, MEM_READ_ROMCS | MEM_WRITE_ROMCS);
+        mem_set_mem_state(0x0e0000, 0x10000, MEM_READ_ROMCS | MEM_WRITE_ROMCS);
     else
-        mem_set_mem_state(0x0e0000, 0x20000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
+        mem_set_mem_state(0x0e0000, 0x10000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
+    mem_set_mem_state(0x0f0000, 0x10000, MEM_READ_ROMCS | MEM_WRITE_ROMCS);
     mem_set_mem_state(0xfe0000, 0x20000, MEM_READ_ROMCS | MEM_WRITE_ROMCS);
 
     mem_mapping_disable(&dev->shadow_mapping[0]);