From 97e6c912eb89b0b82c875982e8ecf6376ee6416d Mon Sep 17 00:00:00 2001
From: TC1995 <mariogplayer90@gmail.com>
Date: Mon, 26 Apr 2021 00:15:15 +0200
Subject: [PATCH] Fixed NVRAM initialization (floppies, hdd's, etc...) for the
 PS/1 computers.

---
 src/machine/m_ps1.c | 4 ++--
 src/nvr_at.c        | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/machine/m_ps1.c b/src/machine/m_ps1.c
index da735d808..d81910fb0 100644
--- a/src/machine/m_ps1.c
+++ b/src/machine/m_ps1.c
@@ -467,7 +467,7 @@ ps1_setup(int model)
 
 	device_add(&snd_device);
 
-	device_add(&fdc_at_actlow_device);
+	device_add(&fdc_at_ps1_device);
 
  	/* Enable the builtin HDC. */
 	if (hdc_current == 1) {
@@ -484,7 +484,7 @@ ps1_setup(int model)
 
 	rom_init(&ps->high_rom,
 		 "roms/machines/ibmps1_2121/fc0000.bin",
-		 0xfc0000, 0x20000, 0x1ffff, 0, MEM_MAPPING_EXTERNAL);
+		 0xfc0000, 0x40000, 0x3ffff, 0, MEM_MAPPING_EXTERNAL);
 
 	/* Initialize the video controller. */
 	if (gfxcard == VID_INTERNAL)
diff --git a/src/nvr_at.c b/src/nvr_at.c
index 2a0679008..160f2bd90 100644
--- a/src/nvr_at.c
+++ b/src/nvr_at.c
@@ -954,6 +954,7 @@ nvr_at_init(const device_t *info)
 	case 2:		/* PS/1 or PS/2 */
 		nvr->irq = 8;
 		local->cent = RTC_CENTURY_PS;
+		local->def = 0x00;
 		break;
 
 	case 3:		/* Amstrad PC's */