My MZ-80B was a kindly donation by Reinhard Soetje / Germany in 2002 equipped with 64K RAM by a MZ-80RM 32kb, expansion unit MZ-80EU, floppy interface MZ-80FI, RS-232 interface MZ-8BIO3, GP-IB MZ-8BIO4, graphic RAM I MZ-80GM 8kb, expansion graphic RAM II MZ-80GMK 8kb, IBV universal printer interface UPI ( also useable for the MZ-80A ), and manuals, software, adverts. I can use CP/M for this nice machine. I'm searching for a Color Display Interface and the HD Interface.