diff --git a/README.md b/README.md
index 3760d4c..c0184ae 100644
--- a/README.md
+++ b/README.md
@@ -24,4 +24,6 @@ $ cat helloworld.fs | ./plank
 | f    | find     | ( c -- xt ) Get execution token of c      |
 | x    | execute  | ( xt -- ... ) Run the execution token     |
 | @    | fetch    | ( addr -- a ) Load value from addr        |
-| !    | store    | ( a addr -- ) Store a to addr             |
+| !    | store    | ( a addr -- ) Store value to addr         |
+| ?    | cfetch   | ( addr -- c ) Load byte from addr         |
+| $    | cstore   | ( c addr -- ) Store byte to addr          |
diff --git a/planck.xxd b/planck.xxd
index 8d88ade..48c0ecc 100644
--- a/planck.xxd
+++ b/planck.xxd
@@ -6,10 +6,10 @@
 00000028: 3400 2000 0100 0000   e_ehsize,e_phentsize,e_phnum,e_shentsize
 00000030: 0000 0000 0100 0000   e_shnum,e_shstrndx,<phdr> PT_LOAD
 00000038: 0000 0000 0080 0408   p_offset,p_vaddr=0x08048000
-00000040: 0000 0000 3002 0000   p_paddr,p_filesz
+00000040: 0000 0000 6002 0000   p_paddr,p_filesz
 00000048: 0000 0008 0700 0000   p_memsz(128MB),PF_X|PF_W|PF_R
 00000050: 0010 0000 0200 0000   p_align, <here>
-00000058: 1882 0408 4881 0408   <latest:init="!">, <interpreter>(5c: key)
+00000058: 4882 0408 4881 0408   <latest:init="$">, <interpreter>(5c: key)
 00000060: c881 0408 f881 0408   (60: find) (64: execute)
 00000068: 9881 0408 f0ff ffff   (68: jump) (6c: -16)
 00000070: be5c 8004 08bd 0080   (70: movl $interpreter,%esi) (75: movl $0x10048000,%ebp)
@@ -68,3 +68,11 @@
 00000218: 0082 0408 0121 0000   !: store
 00000220: 2482 0408 585b 8918   popl %eax; popl %ebx; movl %ebx,(%eax)
 00000228: adff 2000 0000 0000   next;
+
+00000230: 1882 0408 013f 0000   ?: cfetch
+00000238: 3c82 0408 580f b600   popl %eax; movzbl (%eax),%eax;
+00000240: 50ad ff20 0000 0000   pushl %eax; next;
+
+00000248: 3082 0408 0124 0000   $: cstore
+00000250: 5482 0408 585b 8818   popl %eax; popl %ebx; movb %bl,(%eax)
+00000258: adff 2000 0000 0000   next;