OSWORD &23
OSWORD &23 (35) - Write printer buffer information (Colin Dean)
On entry: XY!0 = buffer settings
XY!4 = buffer settings
XY!8 = buffer settings
On exit: XY?12 = status
Status byte: b7-b6 = ?
b5 = Write protected
b4 = ?
b3-b0 = ROM number
