diff --git a/Makefile b/Makefile
index bb5f2a7..8d307c9 100644
--- a/Makefile
+++ b/Makefile
@@ -115,7 +115,8 @@ KernSources =	kernel/ke/cpuid.c kernel/mm/paging.c			\
 		kernel/sh/shell.c kernel/sh/shcmds.c			\
 		kernel/sh/musage.c kernel/io/ata.c			\
 		kernel/sh/argv.c kernel/ke/pit.c			\
-		kernel/sh/testcmds.c kernel/mm/palloc.c
+		kernel/sh/testcmds.c kernel/mm/palloc.c			\
+		kernel/io/acpi.c
 
 KernObj=$(patsubst %.c,$(KOBJDIR)/%.o,$(KernSources))
 KernDep=$(patsubst %.c,$(KOBJDIR)/%.d,$(KernSources))
diff --git a/boot/loader/mem/structures.inc b/boot/loader/mem/structures.inc
index e52bba6..de8013d 100644
--- a/boot/loader/mem/structures.inc
+++ b/boot/loader/mem/structures.inc
@@ -31,7 +31,7 @@ global newStackEnd
 global GDT64
 
 [section .text]
-KERNEL_STACK        equ 16 * 1024 * 1024          ; 16MB of stack
+KERNEL_STACK        equ 1 * 1024 * 1024          ; 1MB of stack
 newKernelEnd        dq  0x0
 newStackEnd         dq  0x0
 
diff --git a/include/io/acpi.h b/include/io/acpi.h
new file mode 100644
index 0000000..9b2d087
--- /dev/null
+++ b/include/io/acpi.h
@@ -0,0 +1,38 @@
+//----------------------------------------------------------------------------//
+//                           GNU GPL OS/K                                     //
+//                                                                            //
+//  Desc:      ACPI, Hardware detection related                               //
+//                                                                            //
+//                                                                            //
+//  Copyright © 2018-2019 The OS/K Team                                       //
+//                                                                            //
+//  This file is part of OS/K.                                                //
+//                                                                            //
+//  OS/K is free software: you can redistribute it and/or modify              //
+//  it under the terms of the GNU General Public License as published by      //
+//  the Free Software Foundation, either version 3 of the License, or         //
+//  any later version.                                                        //
+//                                                                            //
+//  OS/K is distributed in the hope that it will be useful,                   //
+//  but WITHOUT ANY WARRANTY//without even the implied warranty of            //
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
+//  GNU General Public License for more details.                              //
+//                                                                            //
+//  You should have received a copy of the GNU General Public License         //
+//  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
+//----------------------------------------------------------------------------//
+
+#ifndef _KERNEL_H
+#include <kernel.h>
+#endif
+
+#ifndef _IO_ACPI_H
+#define _IO_ACPI_H
+
+//----------------------------------------------------------------------------//
+
+void IoTestAcpi(void);
+
+//----------------------------------------------------------------------------//
+
+#endif
diff --git a/kaleid/kernel/init/info.c b/kaleid/kernel/init/info.c
index 1d2da60..9bf6830 100644
--- a/kaleid/kernel/init/info.c
+++ b/kaleid/kernel/init/info.c
@@ -25,7 +25,7 @@
 #include <init/boot.h>
 
 //
-// BootInfo_t initialization. It is necessary because grub will potentially be
+//  BootInfo_t initialization. It is necessary because grub will potentially be
 //  wiped since it is below 1MB.... And we must reorganize all that stuff.
 //
 void BtInitBootInfo(multiboot_info_t *mbi, void *codeSeg)
diff --git a/kaleid/kernel/init/init.c b/kaleid/kernel/init/init.c
index a739f7a..09e3cbc 100644
--- a/kaleid/kernel/init/init.c
+++ b/kaleid/kernel/init/init.c
@@ -33,6 +33,7 @@
 #include <io/vga.h>
 #include <io/keyb.h>
 #include <io/cursor.h>
+#include <io/acpi.h>
 #include <po/shtdwn.h>
 #include <init/boot.h>
 
@@ -81,6 +82,9 @@ noreturn void BtStartKern(multiboot_info_t *mbInfo, uint mbMagic, void *codeSeg)
     KeGetCpuInfos();
     IoEnableKeyb();
 
+    // ACPI
+    IoTestAcpi();
+
     // Command line (kernel mode)
     ShStartShell();
 
diff --git a/kaleid/kernel/io/acpi.c b/kaleid/kernel/io/acpi.c
new file mode 100644
index 0000000..b5fdd6a
--- /dev/null
+++ b/kaleid/kernel/io/acpi.c
@@ -0,0 +1,39 @@
+//----------------------------------------------------------------------------//
+//                           GNU GPL OS/K                                     //
+//                                                                            //
+//  Desc:       ACPI, Hardware detection related functions                    //
+//                                                                            //
+//                                                                            //
+//  Copyright © 2018-2019 The OS/K Team                                       //
+//                                                                            //
+//  This file is part of OS/K.                                                //
+//                                                                            //
+//  OS/K is free software: you can redistribute it and/or modify              //
+//  it under the terms of the GNU General Public License as published by      //
+//  the Free Software Foundation, either version 3 of the License, or         //
+//  any later version.                                                        //
+//                                                                            //
+//  OS/K is distributed in the hope that it will be useful,                   //
+//  but WITHOUT ANY WARRANTY//without even the implied warranty of            //
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
+//  GNU General Public License for more details.                              //
+//                                                                            //
+//  You should have received a copy of the GNU General Public License         //
+//  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
+//----------------------------------------------------------------------------//
+
+#include <init/boot.h>
+#include <io/vga.h>
+
+void IoTestAcpi(void)
+{
+
+    if (BtFirmwareInfo.romValid)
+        KernLog("\tRom Table is valid at %p\n", BtFirmwareInfo.romTable);
+
+    if (BtFirmwareInfo.apmValid)
+        KernLog("\tApm Table is valid at %p\n", BtFirmwareInfo.apmTable);
+
+
+    return;
+}