From 47e557e9cee5af0e7fdb50737eb8934635b93a83 Mon Sep 17 00:00:00 2001
From: SarahW <pcem@pcem-emulator.co.uk>
Date: Tue, 10 Mar 2020 21:14:57 +0000
Subject: [PATCH] Implement Amstrad reset port 0x66. Fixes CTRL-ALT-DEL on
 Amstrad machines.

---
 src/808x.c    | 1 +
 src/amstrad.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/src/808x.c b/src/808x.c
index f3f8d0f..b080c97 100644
--- a/src/808x.c
+++ b/src/808x.c
@@ -689,6 +689,7 @@ void softresetx86()
         x86seg_reset();
         flushmmucache();
         x86_was_reset = 1;
+        FETCHCLEAR();
 }
 
 static void setznp8(uint8_t val)
diff --git a/src/amstrad.c b/src/amstrad.c
index b952151..714380c 100644
--- a/src/amstrad.c
+++ b/src/amstrad.c
@@ -6,6 +6,7 @@
 #include "mouse.h"
 #include "video.h"
 #include "fdc.h"
+#include "x86.h"
 
 #include "amstrad.h"
 
@@ -77,6 +78,10 @@ void amstrad_write(uint16_t port, uint8_t val, void *priv)
 {
         switch (port)
         {
+                case 0x66:
+                softresetx86();
+                break;
+                
                 case 0x378:
                 case 0x379:
                 case 0x37a:
@@ -161,6 +166,7 @@ void amstrad_init()
         
         io_sethandler(0x0078, 0x0001, amstrad_mouse_read, NULL, NULL, amstrad_mouse_write, NULL, NULL,  NULL);
         io_sethandler(0x007a, 0x0001, amstrad_mouse_read, NULL, NULL, amstrad_mouse_write, NULL, NULL,  NULL);
+        io_sethandler(0x0066, 0x0001, NULL,               NULL, NULL, amstrad_write,       NULL, NULL,  NULL);
         io_sethandler(0x0378, 0x0003, amstrad_read,       NULL, NULL, amstrad_write,       NULL, NULL,  NULL);
         io_sethandler(0xdead, 0x0001, amstrad_read,       NULL, NULL, amstrad_write,       NULL, NULL,  NULL);
         if ((romset == ROM_PC200 || romset == ROM_PPC512) && gfxcard != GFX_BUILTIN)