diff --git a/build-aux/build.sh.in b/build-aux/build.sh.in
index b8900b1b..2a2cb3d0 100644
--- a/build-aux/build.sh.in
+++ b/build-aux/build.sh.in
@@ -102,7 +102,8 @@ fi
 )
 
 if test -n "$M2_PLANET" && (test "$mes_cpu" == "x86" \
-                                || test "$mes_cpu" == "arm"); then
+                                || test "$mes_cpu" == "x86_64" \
+                                || test "$mes_cpu" == "arm" ); then
     (
         . ${srcdest}build-aux/trace.sh
         if [ -z "$V" -o "$V" = 0 ]; then
diff --git a/build-aux/cflags.sh b/build-aux/cflags.sh
index da98b4cb..e19bd1dc 100644
--- a/build-aux/cflags.sh
+++ b/build-aux/cflags.sh
@@ -18,16 +18,20 @@
 
 case "$mes_cpu" in
     arm)
+        cc_cpu=arm
         stage0_cpu=armv7l
         ;;
     x86_64)
+        cc_cpu=x86_64
         stage0_cpu=amd64
         ;;
     x86)
+        cc_cpu=i386
         stage0_cpu=x86
         ;;
     *)
         stage0_cpu=$mes_cpu
+        cc_cpu=$mes_cpu
         ;;
 esac
 
diff --git a/build-aux/config.sh.in b/build-aux/config.sh.in
index ae4c1ce7..a919f141 100644
--- a/build-aux/config.sh.in
+++ b/build-aux/config.sh.in
@@ -97,6 +97,7 @@ export CC
 export DIFF
 export SHELL
 export V
+export cc_cpu
 export colors
 export compiler
 export courageous
diff --git a/build-aux/export.make b/build-aux/export.make
index 3bfb0bff..05b85611 100644
--- a/build-aux/export.make
+++ b/build-aux/export.make
@@ -1,5 +1,5 @@
 # GNU Mes --- Maxwell Equations of Software
-# Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+# Copyright © 2018,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Mes.
 #
@@ -43,6 +43,7 @@ export moduledir
 export sysconfdir
 
 export bootstrap
+export cc_cpu
 export compiler
 export courageous
 export mes_system
diff --git a/include/mes/lib-mini.h b/include/mes/lib-mini.h
index eb994f79..48d91362 100644
--- a/include/mes/lib-mini.h
+++ b/include/mes/lib-mini.h
@@ -41,7 +41,7 @@
    for that by multiplying with M2_PTR_SIZE when using (char)
    pointers. */
 #if __M2__
-#define M2_PTR_SIZE 4
+#define M2_PTR_SIZE sizeof (void*)
 #else
 #define M2_PTR_SIZE 1
 #endif
diff --git a/include/mes/mes.h b/include/mes/mes.h
index 0323b2dc..c189ab69 100644
--- a/include/mes/mes.h
+++ b/include/mes/mes.h
@@ -57,7 +57,7 @@ struct scm
    for that by multiplying with M2_CELL_SIZE when using cell
    pointers. */
 #if __M2__
-#define M2_CELL_SIZE 12
+#define M2_CELL_SIZE sizeof (struct scm)
 #else
 #define M2_CELL_SIZE 1
 #endif
diff --git a/kaem.arm b/kaem.arm
index 4e973a1f..4357c62b 100644
--- a/kaem.arm
+++ b/kaem.arm
@@ -19,6 +19,7 @@
 # Usage:
 # kaem --verbose --strict
 
+cc_cpu=arm
 mes_cpu=arm
 stage0_cpu=armv7l
 kaem --verbose --strict
diff --git a/kaem.run b/kaem.run
index 1179aa23..d4d51b54 100644
--- a/kaem.run
+++ b/kaem.run
@@ -19,6 +19,7 @@
 # Usage:
 # kaem --verbose --strict
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
@@ -27,6 +28,7 @@ mkdir -p m2
 M2-Planet                                       \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -D __${cc_cpu}__=1                          \
     -D __linux__=1                              \
     -f include/mes/config.h                     \
     -f include/mes/lib-mini.h                   \
diff --git a/kaem.x86 b/kaem.x86
index 60ab6e6b..caea7f87 100644
--- a/kaem.x86
+++ b/kaem.x86
@@ -19,6 +19,7 @@
 # Usage:
 # kaem --verbose --strict
 
+cc_cpu=i386
 mes_cpu=x86
 stage0_cpu=x86
 kaem --verbose --strict
diff --git a/kaem.x86_64 b/kaem.x86_64
new file mode 100644
index 00000000..b20aecc3
--- /dev/null
+++ b/kaem.x86_64
@@ -0,0 +1,25 @@
+#! /bin/sh
+# Copyright © 2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+#
+# This file is part of GNU Mes.
+#
+# GNU Mes 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 (at
+# your option) any later version.
+#
+# GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+# Usage:
+# kaem --verbose --strict
+
+cc_cpu=x86_64
+mes_cpu=x86_64
+stage0_cpu=amd64
+kaem --verbose --strict
diff --git a/lib/linux/x86_64-mes-m2/_exit.c b/lib/linux/x86_64-mes-m2/_exit.c
new file mode 100644
index 00000000..3396ebb7
--- /dev/null
+++ b/lib/linux/x86_64-mes-m2/_exit.c
@@ -0,0 +1,29 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2018,2020,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes 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 (at
+ * your option) any later version.
+ *
+ * GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "mes/lib-mini.h"
+
+void
+_exit (int status)
+{
+  asm ("mov____$i32,%rax SYS_exit");
+  asm ("mov____0x8(%rbp),%rdi !-8");
+  asm ("syscall");
+}
diff --git a/lib/linux/x86_64-mes-m2/_write.c b/lib/linux/x86_64-mes-m2/_write.c
new file mode 100644
index 00000000..25b0faed
--- /dev/null
+++ b/lib/linux/x86_64-mes-m2/_write.c
@@ -0,0 +1,31 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2018,2020,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "mes/lib-mini.h"
+
+void
+_write (int filedes, void const *buffer, size_t size)
+{
+  asm ("mov____$i32,%rax SYS_write");
+  asm ("mov____0x8(%rbp),%rdi !-8");
+  asm ("mov____0x8(%rbp),%rsi !-16");
+  asm ("mov____0x8(%rbp),%rdx !-24");
+  asm ("syscall");
+}
diff --git a/lib/linux/x86_64-mes-m2/crt1.M1 b/lib/linux/x86_64-mes-m2/crt1.M1
new file mode 100644
index 00000000..5a792ff2
--- /dev/null
+++ b/lib/linux/x86_64-mes-m2/crt1.M1
@@ -0,0 +1,56 @@
+### GNU Mes --- Maxwell Equations of Software
+### Copyright © 2017,2018,2019,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+###
+### This file is part of GNU Mes.
+###
+### GNU Mes 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 (at
+### your option) any later version.
+###
+### GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+:_start
+	push___%rbp
+	mov____%rsp,%rbp
+
+	;; mes c lib io
+	mov____$i8,%rax !0
+	movl___%eax,0x32 &GLOBAL___stdin
+	mov____$i8,%rax !1
+	movl___%eax,0x32 &GLOBAL___stdout
+	mov____$i8,%rax !2
+	movl___%eax,0x32 &GLOBAL___stderr
+
+	;; M2-Planet pushes forward
+	mov____%rbp,%rax        ;argc
+	add____$i8,%rax !8
+	mov____(%rax),%rax
+	push___%rax
+
+	mov____%rbp,%rax        ;argv
+	add____$i8,%rax !16
+	push___%rax
+
+	mov____%rbp,%rax        ;envp
+	add____$i8,%rax !8
+	mov____(%rax),%rax
+	add____$i8,%rax !0x03
+	shl____$i8,%rax !0x03
+	add____%rbp,%rax
+	push___%rax
+
+	;; mes c lib environ
+	mov____%rax,0x32 &GLOBAL_environ
+
+	call32 %FUNCTION_main
+
+	mov____%rax,%rdi
+	mov____$i32,%rax SYS_exit
+	syscall
diff --git a/lib/linux/x86_64-mes-m2/crt1.c b/lib/linux/x86_64-mes-m2/crt1.c
new file mode 100644
index 00000000..da4c4824
--- /dev/null
+++ b/lib/linux/x86_64-mes-m2/crt1.c
@@ -0,0 +1,34 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2018,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes 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 (at
+ * your option) any later version.
+ *
+ * GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "mes/lib-mini.h"
+
+int __stdin;
+int __stdout;
+int __stderr;
+char **environ;
+int main (int argc, char **argv, char **envp);
+
+/* FIXME: this is going to be called `FUNCTION__start' */
+//#int
+//#_start ()
+//#{
+//# ..
+//#}
diff --git a/lib/linux/x86_64-mes-m2/syscall.c b/lib/linux/x86_64-mes-m2/syscall.c
new file mode 100644
index 00000000..0675be0b
--- /dev/null
+++ b/lib/linux/x86_64-mes-m2/syscall.c
@@ -0,0 +1,137 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2018,2020,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes 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 (at
+ * your option) any later version.
+ *
+ * GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <linux/x86_64/syscall.h>
+
+long
+__sys_call (long sys_call)
+{
+  asm ("mov____0x8(%rbp),%rax !-8");
+  asm ("syscall");
+}
+
+long
+__sys_call1 (long sys_call, long one)
+{
+  asm ("mov____0x8(%rbp),%rax !-8");
+  asm ("mov____0x8(%rbp),%rdi !-16");
+  asm ("syscall");
+}
+
+long
+__sys_call2 (long sys_call, long one, long two)
+{
+  asm ("mov____0x8(%rbp),%rax !-8");
+  asm ("mov____0x8(%rbp),%rdi !-16");
+  asm ("mov____0x8(%rbp),%rsi !-24");
+  asm ("syscall");
+}
+
+long
+__sys_call3 (long sys_call, long one, long two, long three)
+{
+  asm ("mov____0x8(%rbp),%rax !-8");
+  asm ("mov____0x8(%rbp),%rdi !-16");
+  asm ("mov____0x8(%rbp),%rsi !-24");
+  asm ("mov____0x8(%rbp),%rdx !-32");
+  asm ("syscall");
+}
+
+long
+__sys_call4 (long sys_call, long one, long two, long three, long four)
+{
+  asm ("mov____0x8(%rbp),%rax !-8");
+  asm ("mov____0x8(%rbp),%rdi !-16");
+  asm ("mov____0x8(%rbp),%rsi !-24");
+  asm ("mov____0x8(%rbp),%rdx !-32");
+  asm ("mov____0x8(%rbp),%r10 !-40");
+  asm ("syscall");
+}
+
+long
+_sys_call (long sys_call)
+{
+  long r = __sys_call (sys_call);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call1 (long sys_call, long one)
+{
+  long r = __sys_call1 (sys_call, one);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call2 (long sys_call, long one, long two)
+{
+  long r = __sys_call2 (sys_call, one, two);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call3 (long sys_call, long one, long two, long three)
+{
+  long r = __sys_call3 (sys_call, one, two, three);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call4 (long sys_call, long one, long two, long three, long four)
+{
+  long r = __sys_call4 (sys_call, one, two, three, four);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
diff --git a/lib/m2/x86_64/ELF-x86_64.hex2 b/lib/m2/x86_64/ELF-x86_64.hex2
new file mode 100644
index 00000000..32ccc7c7
--- /dev/null
+++ b/lib/m2/x86_64/ELF-x86_64.hex2
@@ -0,0 +1,74 @@
+### Copyright (C) 2016 Jeremiah Orians
+### Copyright (C) 2017 Jan Nieuwenhuizen <janneke@gnu.org>
+### This file is part of M2-Planet.
+###
+### M2-Planet 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
+### (at your option) any later version.
+###
+### M2-Planet 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 M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+
+### stage0's hex2 format
+###    !<label>          1 byte relative
+###    $<label>          2 byte address
+###    @<label>          2 byte relative
+###    &<label>          4 byte address
+###    %<label>          4 byte relative
+
+### if you wish to use this header, you need to add :ELF_end to the end of your
+### M1 or hex2 files.
+
+## ELF Header
+
+:ELF_base
+7F 45 4C 46                               # e_ident[EI_MAG0-3] ELF's magic number
+
+02                                        # e_ident[EI_CLASS] Indicating 64 bit
+01                                        # e_ident[EI_DATA] Indicating little endianness
+01                                        # e_ident[EI_VERSION] Indicating original elf
+
+03                                        # e_ident[EI_OSABI] Set at 3 because FreeBSD is strict
+00                                        # e_ident[EI_ABIVERSION] See above
+
+00 00 00 00 00 00 00                      # e_ident[EI_PAD]
+
+02 00                                     # e_type Indicating Executable
+3E 00                                     # e_machine Indicating AMD64
+01 00 00 00                               # e_version Indicating original elf
+
+&_start 00 00 00 00                       # e_entry Address of the entry point
+%ELF_program_headers>ELF_base 00 00 00 00 # e_phoff Address of program header table
+00 00 00 00 00 00 00 00                   # e_shoff Address of section header table
+
+00 00 00 00                               # e_flags
+
+40 00                                     # e_ehsize Indicating our 64 Byte header
+
+38 00                                     # e_phentsize size of a program header table
+01 00                                     # e_phnum number of entries in program table
+
+00 00                                     # e_shentsize size of a section header table
+00 00                                     # e_shnum number of entries in section table
+
+00 00                                     # e_shstrndx index of the section names
+
+
+:ELF_program_headers
+:ELF_program_header__text
+01 00 00 00                               # ph_type: PT-LOAD = 1
+07 00 00 00                               # ph_flags: PF-X|PF-W|PF-R = 7
+00 00 00 00 00 00 00 00                   # ph_offset
+&ELF_base 00 00 00 00                     # ph_vaddr
+&ELF_base 00 00 00 00                     # ph_physaddr
+%ELF_end>ELF_base 00 00 00 00             # ph_filesz
+%ELF_end>ELF_base 00 00 00 00             # ph_memsz
+01 00 00 00 00 00 00 00                   # ph_align
+
+:ELF_text
diff --git a/lib/m2/x86_64/x86_64_defs.M1 b/lib/m2/x86_64/x86_64_defs.M1
new file mode 100644
index 00000000..128272d3
--- /dev/null
+++ b/lib/m2/x86_64/x86_64_defs.M1
@@ -0,0 +1,101 @@
+## Copyright (C) 2017 Jeremiah Orians
+## This file is part of M2-Planet.
+##
+## M2-Planet 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
+## (at your option) any later version.
+##
+## M2-Planet 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 M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+
+
+DEFINE ADD_IMMEDIATE_to_rax 4805
+DEFINE ADD_IMMEDIATE_to_rbp 4881C5
+DEFINE ADD_rax_to_rbx 4801C3
+DEFINE ADD_rbp_to_rax 4801E8
+DEFINE ADD_rbx_to_rax 4801D8
+DEFINE AND_rax_rbx 4821D8
+DEFINE CALL_IMMEDIATE E8
+DEFINE CALL_rax FFD0
+DEFINE CMP 4839C3
+DEFINE COPY_rax_to_rcx 4889C1
+DEFINE COPY_rax_to_rdi 4889C7
+DEFINE COPY_rbx_to_rax 4889D8
+DEFINE COPY_rbp_to_rax 4889E8
+DEFINE COPY_rbx_to_rdi 4889DF
+DEFINE COPY_rdi_to_rbp 4889FD
+DEFINE COPY_rsp_to_rbp 4889E5
+DEFINE COPY_RSP_to_RDI 4889E7
+DEFINE CQTO 4899
+DEFINE DIVIDE_rax_by_rbx_into_rax 48F7F3
+DEFINE DIVIDES_rax_by_rbx_into_rax 48F7FB
+DEFINE JUMP E9
+DEFINE JUMP_EQ 0F84
+DEFINE JUMP_NE 0F85
+DEFINE LOAD_BASE_ADDRESS_rax 488D85
+DEFINE LOAD_BYTE 480FBE00
+DEFINE LOAD_BYTE_rbx 480FBE1B
+DEFINE LOAD_EFFECTIVE_ADDRESS_rax 488D8424
+DEFINE LOAD_EFFECTIVE_ADDRESS_rdi 488DBC24
+DEFINE LOAD_EFFECTIVE_ADDRESS_rdx 488D9424
+DEFINE LOAD_EFFECTIVE_ADDRESS_rsi 488DB424
+DEFINE LOAD_IMMEDIATE_r10 48C7C2
+DEFINE LOAD_IMMEDIATE_rax 48C7C0
+DEFINE LOAD_IMMEDIATE_rbx 48C7C3
+DEFINE LOAD_IMMEDIATE_rdi 48C7C7
+DEFINE LOAD_IMMEDIATE_rdx 48C7C2
+DEFINE LOAD_IMMEDIATE_rsi 48C7C6
+DEFINE LOAD_INTEGER 488B00
+DEFINE LOAD_INTEGER_rbx 488B1B
+DEFINE LOAD_INTEGER_rdi 488B3F
+DEFINE LOAD_INTEGER_rdx 488B12
+DEFINE LOAD_INTEGER_rsi 488B36
+DEFINE LOAD_RSP_IMMEDIATE_into_rax 488B8424
+DEFINE MODULUS_rax_from_rbx_into_rbx 48F7F3
+DEFINE MODULUSS_rax_from_rbx_into_rbx 48F7FB
+DEFINE MOVE_rbx_to_rax 4889D8
+DEFINE MOVE_rdx_to_rax 4889D0
+DEFINE MOVEZX 480FB6C0
+DEFINE MOVESX 4863C0
+DEFINE MULTIPLY_rax_by_rbx_into_rax 48F7EB
+DEFINE MULTIPLYS_rax_by_rbx_into_rax 48F7E3
+DEFINE NULL 0000000000000000
+DEFINE NOT_rax 48F7D0
+DEFINE OR_rax_rbx 4809D8
+DEFINE POP_RAX 58
+DEFINE POP_RBP 5D
+DEFINE POP_RBX 5B
+DEFINE POP_RDI 5F
+DEFINE PUSH_RAX 50
+DEFINE PUSH_RBP 55
+DEFINE PUSH_RBX 53
+DEFINE PUSH_RDI 57
+DEFINE RETURN C3
+DEFINE SAL_rax_Immediate8 48C1E0
+DEFINE SHL_rax_cl 48D3E0
+DEFINE SAL_rax_cl 48D3F0
+DEFINE SHR_rax_cl 48D3E8
+DEFINE SAR_rax_cl 48D3F8
+DEFINE SETA 0F97C0
+DEFINE SETAE 0F93C0
+DEFINE SETB 0F92C0
+DEFINE SETBE 0F96C0
+DEFINE SETE 0F94C0
+DEFINE SETG 0F9FC0
+DEFINE SETGE 0F9DC0
+DEFINE SETL 0F9CC0
+DEFINE SETLE 0F9EC0
+DEFINE SETNE 0F95C0
+DEFINE STORE_CHAR 8803
+DEFINE STORE_INTEGER 488903
+DEFINE SUBTRACT_rax_from_rbx_into_rbx 4829C3
+DEFINE SYSCALL 0F05
+DEFINE TEST 4885C0
+DEFINE XCHG_rax_rbx 4893
+DEFINE XOR_rbx_rax_into_rax 4831D8
diff --git a/lib/x86_64-mes/x86_64.M1 b/lib/x86_64-mes/x86_64.M1
index 6bb2b0b2..9df43bc8 100644
--- a/lib/x86_64-mes/x86_64.M1
+++ b/lib/x86_64-mes/x86_64.M1
@@ -28,6 +28,7 @@ DEFINE add____$i32,%rdi 4881c7
 DEFINE add____$i32,(%rax) 8100
 DEFINE add____$i32,0x32(%rbp) 8185
 DEFINE add____$i8,%rax 4883c0
+DEFINE add____$i8,%rbp 4883c5
 DEFINE add____$i8,%rdi 4883c7
 DEFINE add____$i8,%rsp 4883c4
 DEFINE add____$i8,(%rax) 8300
@@ -115,6 +116,7 @@ DEFINE mov____%rbp,%rsp 4889ec
 DEFINE mov____%rbp,0x8(%rbp) 48896d
 DEFINE mov____%rdi,%r8 4989f8
 DEFINE mov____%rdi,%rax 4889f8
+DEFINE mov____%rdi,%rbp 4889fd
 DEFINE mov____%rdi,%rcx 4889f9
 DEFINE mov____%rdi,%rdi 4889ff
 DEFINE mov____%rdi,0x32 48893c25
diff --git a/scaffold/argv.kaem b/scaffold/argv.kaem
index 1e2109db..3797bc68 100644
--- a/scaffold/argv.kaem
+++ b/scaffold/argv.kaem
@@ -20,12 +20,15 @@
 # kaem --verbose --strict --file scaffold/argv.kaem
 # scaffold/argv-m2
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
 M2-Planet                                       \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -D __${cc_cpu}__=1                          \
+    -D __linux__=1                              \
     -f include/mes/lib-mini.h                   \
     -f lib/linux/${mes_cpu}-mes-m2/crt1.c       \
     -f lib/linux/${mes_cpu}-mes-m2/_exit.c      \
diff --git a/scaffold/global-array.kaem b/scaffold/global-array.kaem
index 0eee8336..8ada16d9 100644
--- a/scaffold/global-array.kaem
+++ b/scaffold/global-array.kaem
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright © 2019,2021,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+# Copyright © 2019,2021,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Mes.
 #
@@ -20,6 +20,7 @@
 # kaem --verbose --strict --file scaffold/global-array.kaem
 # scaffold/global-array
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
@@ -27,6 +28,9 @@ M2-Planet                                       \
     --bootstrap-mode                            \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -D __${cc_cpu}__=1                          \
+    -D __linux__=1                              \
+    -f lib/linux/${mes_cpu}-mes-m2/crt1.c       \
     -f lib/mes/globals.c                        \
     -f lib/linux/${mes_cpu}-mes-m2/_exit.c      \
     -f lib/linux/${mes_cpu}-mes-m2/_write.c     \
diff --git a/scaffold/hello.kaem b/scaffold/hello.kaem
index f32a15b0..7b45ca03 100644
--- a/scaffold/hello.kaem
+++ b/scaffold/hello.kaem
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright © 2019,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+# Copyright © 2019,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Mes.
 #
@@ -20,12 +20,15 @@
 # kaem --verbose --strict --file scaffold/hello.kaem
 # scaffold/hello-m2
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
 M2-Planet                                       \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -D __${cc_cpu}__=1                          \
+    -D __linux__=1                              \
     -f include/mes/lib-mini.h                   \
     -f lib/linux/${mes_cpu}-mes-m2/crt1.c       \
     -f lib/linux/${mes_cpu}-mes-m2/_exit.c      \
diff --git a/scaffold/local-array.kaem b/scaffold/local-array.kaem
index dad4f917..4a7e3a72 100644
--- a/scaffold/local-array.kaem
+++ b/scaffold/local-array.kaem
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright © 2019,2021,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+# Copyright © 2019,2021,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Mes.
 #
@@ -20,6 +20,7 @@
 # kaem --verbose --strict --file scaffold/local-array.kaem
 # scaffold/local-array
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
@@ -27,6 +28,9 @@ M2-Planet                                       \
     --bootstrap-mode                            \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -D __${cc_cpu}__=1                          \
+    -D __linux__=1                              \
+    -f lib/linux/${mes_cpu}-mes-m2/crt1.c       \
     -f lib/mes/globals.c                        \
     -f lib/linux/${mes_cpu}-mes-m2/_exit.c      \
     -f lib/linux/${mes_cpu}-mes-m2/_write.c     \
diff --git a/scaffold/local-static-array.kaem b/scaffold/local-static-array.kaem
index 3b537d09..14986fb3 100644
--- a/scaffold/local-static-array.kaem
+++ b/scaffold/local-static-array.kaem
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright © 2019,2021,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+# Copyright © 2019,2021,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Mes.
 #
@@ -20,6 +20,7 @@
 # kaem --verbose --strict --file scaffold/local-static-array.kaem
 # scaffold/local-static-array
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
@@ -27,6 +28,9 @@ M2-Planet                                       \
     --bootstrap-mode                            \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -f lib/linux/${mes_cpu}-mes-m2/crt1.c       \
+    -D __${cc_cpu}__=1                          \
+    -D __linux__=1                              \
     -f lib/mes/globals.c                        \
     -f lib/linux/${mes_cpu}-mes-m2/_exit.c      \
     -f lib/linux/${mes_cpu}-mes-m2/_write.c     \
diff --git a/scaffold/main.kaem b/scaffold/main.kaem
index 23a077ab..3fa38fb0 100644
--- a/scaffold/main.kaem
+++ b/scaffold/main.kaem
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright © 2019,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+# Copyright © 2019,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Mes.
 #
@@ -20,12 +20,15 @@
 # kaem --verbose --strict --file scaffold/main.kaem
 # scaffold/main-m2
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
 M2-Planet                                       \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -D __${cc_cpu}__=1                          \
+    -D __linux__=1                              \
     -f lib/linux/${mes_cpu}-mes-m2/crt1.c       \
     -f scaffold/main.c                          \
     -o scaffold/main.M1
diff --git a/scaffold/read.kaem b/scaffold/read.kaem
index 974c9fa4..55a981f7 100644
--- a/scaffold/read.kaem
+++ b/scaffold/read.kaem
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright © 2019,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+# Copyright © 2019,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Mes.
 #
@@ -20,12 +20,15 @@
 # kaem --verbose --strict --file scaffold/read.kaem
 # scaffold/read-m2
 
+cc_cpu=${cc_cpu:-i386}
 mes_cpu=${mes_cpu:-x86}
 stage0_cpu=${stage0_cpu:-x86}
 
 M2-Planet                                       \
     --debug                                     \
     --architecture ${stage0_cpu}                \
+    -D __${cc_cpu}__=1                          \
+    -D __linux__=1                              \
     -f lib/linux/${mes_cpu}-mes-m2/crt1.c       \
     -f include/mes/lib-mini.h                   \
     -f lib/linux/${mes_cpu}-mes-m2/_write.c     \
diff --git a/src/posix.c b/src/posix.c
index 75201ca9..b619ac14 100644
--- a/src/posix.c
+++ b/src/posix.c
@@ -373,15 +373,16 @@ waitpid_ (struct scm *pid, struct scm *options)
   return cons (make_number (child), make_number (status));
 }
 
-#if __M2__
-/* Milliseconds for everyone else.  */
-#define TIME_UNITS_PER_SECOND 1000
-#elif __x86_64__
+#if __x86_64__
 /* Nanoseconds on 64-bit systems with POSIX timers.  */
+#if __M2__
+#define TIME_UNITS_PER_SECOND 1000000000
+#else
 #define TIME_UNITS_PER_SECOND 1000000000U
+#endif
 #else
 /* Milliseconds for everyone else.  */
-#define TIME_UNITS_PER_SECOND 1000U
+#define TIME_UNITS_PER_SECOND 1000
 #endif
 
 struct scm *