公开(公告)号：CA1182213A

公开(公告)日：1985-02-05

申请号：CA385506

申请日：1981-09-09

Applicant: IBM

Inventor： KRISHNAMURTY RAJAN ,  VOLTIN JOHN A

IPC: G11B20/10 ,  G11B5/02 ,  G11B5/024 ,  G11B5/09 ,  G11B27/36

Abstract: SAFEGUARDING OF DATA RECORDED ON DISK BY TUNNEL ERASE MAGNETIC HEAD ASSEMBLY Apparatus is provided for the safeguarding of data recorded on disk and diskettes by tunnel erase magnetic head assembly which comprise a read/write transducer for magnetically recording data along tracks on said disk and a pair of magnetic erase transducers adjacent to the read/write transducer for limiting the width of the recorded data. The apparatus for safeguarding the recorded data comprises apparatus for sensing the activation of the erase and/or read/write transducer and apparatus responsive to such sensed activation for determining if the activation is erroneous.

公开(公告)号：PL167318B1

公开(公告)日：1995-08-31

申请号：PL29893791

申请日：1991-10-29

Applicant: IBM

Inventor： BEATTIE IRENE ,  DESAI NARENDRA M ,  VANOVER MICHAEL T ,  VOLTIN JOHN A

IPC: G06T11/00 ,  G09G5/06 ,  G06F3/14 ,  G09G5/14

Abstract: A video display system selectively controls by window the number of overlay planes, the number of overlay palettes, and the overlay/underlay plane masks in a graphics display. A logic/multiplex control 13, 11 translates overlay and underlay data patterns from a multiple plane VRAM 12, referenced to the graphics system frame buffer 9, into window specific patterns. The window related translation is conveyed to conventional RAMDACs 11 for raster scan synchronized digital-to-analog conversion. The translation as provided by the controller is responsive to data selectively and dynamicaliy written into a random access memory 14, thus providing translation of overlay/underlay data into window distinct and selective overlay/underlay palette functions.

公开(公告)号：CA2053988C

公开(公告)日：1995-12-12

申请号：CA2053988

申请日：1991-10-22

Applicant: IBM

Inventor： BEATTIE IRENE ,  DESAI NARENDRA M ,  VANOVER MICHAEL T ,  VOLTIN JOHN A

IPC: G06F3/14 ,  G06T11/00 ,  G09G5/06 ,  G09G5/14

Abstract: Apparatus and methods for selectively controlling by window the number of overlay planes, the number of overlay palettes, and the overlay/underlay plane masks in a graphics video display system. A logic/multiplex control translates overlay and underlay data patterns from a multiple plane VRAM, referenced to the graphics system frame buffer, into window specific patterns. The window related translation is conveyed to conventional RAMDACs for raster scan synchronized digital-to-analog conversion. The translation as provided by the controller is responsive to data selectively and dynamically written into a random access memory, thus providing translation of overlay/underlay data into window distinct and selective overlay/underlay palette functions.

公开(公告)号：SK46493A3

公开(公告)日：1993-09-09

申请号：SK46493

申请日：1991-10-29

Applicant: IBM

Inventor： BEATTIE IRENE ,  DESAI NARENDRA M ,  VANOVER MICHAEL T ,  VOLTIN JOHN A

IPC: G06T11/00 ,  G09G5/06 ,  G06F3/14 ,  G09G5/14

Abstract: A video display system selectively controls by window the number of overlay planes, the number of overlay palettes, and the overlay/underlay plane masks in a graphics display. A logic/multiplex control 13, 11 translates overlay and underlay data patterns from a multiple plane VRAM 12, referenced to the graphics system frame buffer 9, into window specific patterns. The window related translation is conveyed to conventional RAMDACs 11 for raster scan synchronized digital-to-analog conversion. The translation as provided by the controller is responsive to data selectively and dynamicaliy written into a random access memory 14, thus providing translation of overlay/underlay data into window distinct and selective overlay/underlay palette functions.

公开(公告)号：CA2053988A1

公开(公告)日：1992-05-16

申请号：CA2053988

申请日：1991-10-22

Applicant: IBM

Inventor： BEATTIE IRENE ,  DESAI NARENDRA M ,  VANOVER MICHAEL T ,  VOLTIN JOHN A

IPC: G06F3/14 ,  G06T11/00 ,  G09G5/06 ,  G09G5/14

Abstract: A video display system selectively controls by window the number of overlay planes, the number of overlay palettes, and the overlay/underlay plane masks in a graphics display. A logic/multiplex control 13, 11 translates overlay and underlay data patterns from a multiple plane VRAM 12, referenced to the graphics system frame buffer 9, into window specific patterns. The window related translation is conveyed to conventional RAMDACs 11 for raster scan synchronized digital-to-analog conversion. The translation as provided by the controller is responsive to data selectively and dynamicaliy written into a random access memory 14, thus providing translation of overlay/underlay data into window distinct and selective overlay/underlay palette functions.

公开(公告)号：BR8800293A

公开(公告)日：1988-09-06

申请号：BR8800293

申请日：1988-01-26

Applicant: IBM

Inventor： HOFFMAN HARRELL ,  SMITH SCOTT M ,  VOLTIN JOHN A ,  WRIGHT CHARLES GORDON

IPC: G06F9/38 ,  G06F7/00 ,  G06F11/00 ,  G06F11/22 ,  G06F13/28 ,  G06F13/38 ,  G06F15/16 ,  G06F15/177 ,  G06F13/36

公开(公告)号：CA1169558A

公开(公告)日：1984-06-19

申请号：CA387026

申请日：1981-09-30

Applicant: IBM

Inventor： ASHFORD THOMAS J ,  KRISHNAMURTY RAJAN ,  VOLTIN JOHN A

IPC: G06F11/22 ,  G05B19/4063 ,  G06F11/26 ,  G06F11/267 ,  G06F13/00 ,  G09B9/00 ,  G06F11/28 ,  G11C29/00

Abstract: A CENTRAL PROCESSOR SUPERVISED MACHINE TOOL CONTROLLER SYSTEM HAVING A SIMULATION OF THE TOOL CONTROLLER IN THE CENTRAL PROCESSOR FOR TEST PURPOSES In a system for controlling a machine tool by a tool controller under the supervision of a central data processor, in which the controller transforms the data provided by the central processor into a format compatible with the machine tool, e.g., clock pulse encoded data format suitable for writing into and reading out of a serial storage magnetic memory device, a test system is provided wherein the central processor includes a simulation of the controller. This simulated controller gives the processor the capability of simulating and applying to the tool controller data in a format equivalent to that normally applied to the tool controller from the tool itself, e.g., a clock encoded data read output. The simulated controller also provides the central processor with the capability of receiving from the tool controller a tool control output in the format compatible with the control tool, e.g., clock encoded data and changing said data into an original format usable in the central processor.