diff --git a/basis/compiler/cfg/build-stack-frame/build-stack-frame-docs.factor b/basis/compiler/cfg/build-stack-frame/build-stack-frame-docs.factor
index 77b84ab6ad..36036a1f63 100644
--- a/basis/compiler/cfg/build-stack-frame/build-stack-frame-docs.factor
+++ b/basis/compiler/cfg/build-stack-frame/build-stack-frame-docs.factor
@@ -4,6 +4,10 @@ IN: compiler.cfg.build-stack-frame
 ARTICLE: "compiler.cfg.build-stack-frame" "Computing stack frame size and layout"
 "The " { $vocab-link "compiler.cfg.build-stack-frame" } " vocab builds stack frames for cfg:s." ;
 
+HELP: param-area-size
+{ $var-description "Temporary variable used when building stack frames to calculate the parameter area size." }
+{ $see-also build-stack-frame } ;
+
 HELP: frame-required?
 { $var-description "Whether the word being compiled requires a stack frame or not. Most words does, but very simple words does not." } ;
 
diff --git a/basis/compiler/cfg/def-use/def-use-docs.factor b/basis/compiler/cfg/def-use/def-use-docs.factor
index 320e0550bb..bcb7bc0dbe 100644
--- a/basis/compiler/cfg/def-use/def-use-docs.factor
+++ b/basis/compiler/cfg/def-use/def-use-docs.factor
@@ -36,6 +36,10 @@ HELP: uses-vregs
   }
 } ;
 
+HELP: special-vreg-insns
+{ $var-description "Instructions with unusual operands, also see these passes for special behavior:" { $list "compiler.cfg.renaming.functor" "compiler.cfg.representations.preferred" }
+} ;
+
 ARTICLE: "compiler.cfg.def-use" "Common code used by several passes for def-use analysis"
 "The " { $vocab-link "compiler.cfg.def-use" } " contains tools to correlate SSA instructions with virtual registers defined or used by them."
 $nl
diff --git a/basis/compiler/cfg/def-use/def-use.factor b/basis/compiler/cfg/def-use/def-use.factor
index 9f750f16dc..770dfbc46d 100644
--- a/basis/compiler/cfg/def-use/def-use.factor
+++ b/basis/compiler/cfg/def-use/def-use.factor
@@ -20,10 +20,6 @@ M: insn defs-vregs drop { } ;
 M: insn temp-vregs drop { } ;
 M: insn uses-vregs drop { } ;
 
-! Instructions with unusual operands, also see these passes
-! for special behavior:
-! - compiler.cfg.renaming.functor
-! - compiler.cfg.representations.preferred
 CONSTANT: special-vreg-insns {
     ##parallel-copy
     ##phi
diff --git a/basis/compiler/cfg/instructions/instructions-docs.factor b/basis/compiler/cfg/instructions/instructions-docs.factor
index 6e147a7d89..d263bc293c 100644
--- a/basis/compiler/cfg/instructions/instructions-docs.factor
+++ b/basis/compiler/cfg/instructions/instructions-docs.factor
@@ -1,6 +1,6 @@
-USING: arrays assocs classes compiler.cfg compiler.codegen.gc-maps
+USING: alien arrays assocs classes compiler.cfg compiler.codegen.gc-maps
 cpu.architecture help.markup help.syntax kernel layouts sequences
-slots.private ;
+slots.private system ;
 IN: compiler.cfg.instructions
 
 HELP: new-insn
@@ -62,7 +62,10 @@ HELP: ##alien-invoke
   "An instruction for calling a function in a dynamically linked library. It has the following slots:"
   { $table
     { { $slot "reg-inputs" } { "Registers to use for the arguments to the function call." } }
-    { { $slot "stack-inputs" } { "Stack slots used for the arguments to the function call. Only used if all register arguments are already filled." } }
+    {
+        { $slot "stack-inputs" }
+        { "Stack slots used for the arguments to the function call." }
+    }
     {
         { $slot "reg-outputs" }
         { "If the called function returns a value, then this slot is a one-element sequence containing a 3-tuple describing which register is used for the return value." }
@@ -70,6 +73,7 @@ HELP: ##alien-invoke
     { { $slot "symbols" } { "Name of the function to call." } }
     { { $slot "dll" } { "A dll handle." } }
   }
+  "Which function arguments that goes in " { $slot "reg-inputs" } " and which goes in " { $slot "stack-inputs" } " depend on the calling convention. In " { $link cdecl } " on " { $link x86.32 } ", all arguments goes in " { $slot "stack-inputs" } " but on " { $link x86.64 } " the first six arguments are passed in registers and only then are the stack used."
 } ;
 
 HELP: alien-call-insn
diff --git a/basis/cpu/architecture/architecture-docs.factor b/basis/cpu/architecture/architecture-docs.factor
index ddf4972d1c..bcb70beea3 100644
--- a/basis/cpu/architecture/architecture-docs.factor
+++ b/basis/cpu/architecture/architecture-docs.factor
@@ -98,7 +98,17 @@ HELP: %load-immediate
 
 HELP: %call
 { $values { "word" word } }
-{ $description "Emits code for calling a word in Factor." } ;
+{ $description "Emits code for calling a Factor word." } ;
+
+HELP: %box
+{ $values
+  { "dst" "destination register" }
+  { "src" "source register" }
+  { "func" "function?" }
+  { "rep" "representation class" }
+  { "gc-map" gc-map }
+}
+{ $description "Call a function to convert a value into a tagged pointer, possibly allocating a bignum, float, or alien instance, which is then pushed on the data stack." } ;
 
 HELP: %box-alien
 { $values { "dst" "destination register" } { "src" "source register" } { "temp" "temporary register" } }