公开(公告)号：FR2721417A1

公开(公告)日：1995-12-22

申请号：FR9505302

申请日：1995-04-27

Applicant: IBM

Inventor： DALE AAKER KENNETH ,  GULBERTSON BRUCE RICHARD ,  NELSON ERIC JOHN ,  AMELL STEVEN JOSEPH ,  BEHRENS LOUIS EDWARD ,  KIEL HARVEY GENE ,  OKIMOTO SHOHJI

IPC: G06F15/00 ,  G06F3/14 ,  G06F13/00 ,  G09G5/40 ,  H04N1/00 ,  H04N7/16 ,  G06F19/00

Abstract: The system employed comprises a central computer (12), a number of unprogrammable video terminals (14) and a programmable workstation emulator (15). The CPU (16) is connected to a workstation controller (18). A synchronous data line controller (20) is used with a remote workstation controller (22) at the end of an SDLC link (24), similar to that (24A) connects another SDLC controller (20A) to the emulator. When another function is requested by the user, the nonprogrammable terminal or programmable workstation sends memorised video information to the central computer including image counter data in cache memory, scaling data and on-screen placement data.