Yank from begin to endpoint of <count><move>.
Yank from begin to endpoint of <count><move> to register.
Yank from begin to endpoint of <count><move> and append to register.
<count> lines.
Idem (should be equivalent to y$ though).
Mark the cursor position with a letter.
Show contents of textmarker.
Show contents of register.
Put the contents of the (default undo) buffer <count> times after the cursor. The register will be automatically down-cased.
Put the contents of the (default undo) buffer <count> times before the cursor. The register will