BAN in DAI

From: S & L
Message: 23260
Date: 2003-06-14

In DAI /ie "De Administrando Imperio" by Constantine Porphyrogenitus [Greek text edited by Gyula Moravcsik; English translation by R.J.H. Jenkins; New, Revised Edition, Dumbarton Oaks, Washington, 1967]:

Chapter 30, pg. 144/145 exists: βοάνοV = voanos/boanos [translated as BAN]

Chapter 31, pg. 150/151: βοεάνου = voeanou/boeanou [translated as BAN/at gen.(itive)].

As far as I know, b_beta is pronounced as V in Modern Greek and as B in Classical Greek.

Now, my question is in which kind/style of language wrote Constantine Porphyrogenitus; in Attic or Vernacular Greek or a mixed style?

Does anybody has access to “Greek: A History of the Language and Its Speakers” by Geoffrey C. Horrocks [416 pages, June 1997, Longman Linguistics Library, Addison-Wesley Pub Co; ISBN: 0582307090]

where probably exists, in SECTION II. Byzantium: from Constantine I to Mehmet the Conqueror/10. Middle styles in Byzantium/10.4.1 Konstantinos VII Porphyrogennetos (905-‘59), a commentary on Porphyrogenitus’s language.

I would love to receive some help on this,

S o r i n