Minor cleanups.

Several minor comment improvements.
Rearrange some definitions to make them more clear.
diff --git a/TODO b/TODO
index c19b5a8..5d6be5c 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,13 @@
+Split rombios32.c up into multiple files.
+Review changes committed to coreboot, virtualbox, qemu, kvm, and bochs
+cvs tip.
+Alter ISRs so that they do not enable irqs.  Only call out to other
+bios functions after minimizing stack usage.
+Try to write a script to analyze stack usage of 16bit code.
 Audit all sti/cli calls.  Audit all call16 calls to make sure flags is
 setup properly with respect to irqs.
@@ -17,12 +27,7 @@
 Cleanup setting of ES on GET/SET_BDA
-Make sure inline assembly isn't preventing inlining of calling
-Convert remaining parts of rombios.c to new code.
-Convert rombios32 and apm bios stuff to new code.
+Possibly implement 32bit pcibios support.
 Allow one to select adding 32 bit code to 0xf000 or in a separate