公开(公告)号：BE1001069A3

公开(公告)日：1989-06-27

申请号：BE8800017

申请日：1988-01-08

Applicant: IBM

Inventor： TRYNOSKY STEPHEN WAYNE ,  PARSONS DONALD HOLCOMBE JR

IPC: G06F3/153 ,  G09G1/00 ,  G09G1/16 ,  G09G5/22 ,  G09G5/24 ,  G09G

Abstract: Système d'affichage à balayage de trame utilisant un générateur de caractères à mémoire RAM et une mémoire à accès aléatoire de mémoire intermédiaire vidéo à ports doubles, la mémoire intermédiaire vidéo à ports doubles recevant une sortie de registre à décalage pour retenir une rangée de données depuis la mémoire à accès aléatoire, la mémoire intermédiaire ayant deux parties, l'une contenant dans des emplacements consécutifs des données de caractère et des données d'attribut et l'autre contenant des données de caractère et des données de type caractère.

公开(公告)号：FR2613109A1

公开(公告)日：1988-09-30

申请号：FR8718513

申请日：1987-12-29

Applicant: IBM

Inventor： TRYNOSKY STEPHEN WAYNE ,  PARSONS DONALD HOLCOMBE JR

IPC: G06F3/153 ,  G09G1/00 ,  G09G1/16 ,  G09G5/22 ,  G09G5/24 ,  G09G1/14 ,  G09G1/02

Abstract: A raster scan display system uses a RAM character generator and a dual port video buffer random access memory. The dual port buffer has a shift register output for holding a row of data from the random access memory. The buffer has two partitions, one containing, at consecutive locations, character data and attribute data, the other, character data and font data. In a first mode of operation using the first partition, data transferred to the shift register comprises character data to address the character generator store and attribute data for combination with font data retrieved from the character generator store to provide video data. In a second mode, using the second partition, character and font data transferred to the shift register is used to address and update the character generator store.

公开(公告)号：AT74224T

公开(公告)日：1992-04-15

申请号：AT87118541

申请日：1987-12-15

Applicant: IBM

Inventor： TRYNOSKY STEPHEN WAYNE ,  PARSONS DONALD HOLCOMBE JR

IPC: G06F3/153 ,  G09G1/00 ,  G09G1/16 ,  G09G5/22 ,  G09G5/24

Abstract: A raster scan display system uses a RAM character generator and a dual port video buffer random access memory. The dual port buffer has a shift register output for holding a row of data from the random access memory. The buffer has two partitions, one containing, at consecutive locations, character data and attribute data, the other, character data and font data. In a first mode of operation using the first partition, data transferred to the shift register comprises character data to address the character generator store and attribute data for combination with font data retrieved from the character generator store to provide video data. In a second mode, using the second partition, character and font data transferred to the shift register is used to address and update the character generator store.

公开(公告)号：HK11692A

公开(公告)日：1992-02-21

申请号：HK11692

申请日：1992-02-13

Applicant: IBM

Inventor： TRYNOSKY STEPHEN WAYNE ,  PARSONS DONALD HOLCOMBE JR

IPC: G06F3/153 ,  G09G1/00 ,  G09G1/16 ,  G09G5/22 ,  G09G5/24 ,  G09G1/02

Abstract: A raster scan display system uses a RAM character generator and a dual port video buffer random access memory. The dual port buffer has a shift register output for holding a row of data from the random access memory. The buffer has two partitions, one containing, at consecutive locations, character data and attribute data, the other, character data and font data. In a first mode of operation using the first partition, data transferred to the shift register comprises character data to address the character generator store and attribute data for combination with font data retrieved from the character generator store to provide video data. In a second mode, using the second partition, character and font data transferred to the shift register is used to address and update the character generator store.

公开(公告)号：IT8819947D0

公开(公告)日：1988-03-25

申请号：IT1994788

申请日：1988-03-25

Applicant: IBM

Inventor： TRYNOSKY STEPHEN WAYNE ,  PARSONS DONALD HOLCOMBE JR

IPC: G06F3/153 ,  G09G1/00 ,  G09G1/16 ,  G09G5/22 ,  G09G5/24

Abstract: A raster scan display system uses a RAM character generator and a dual port video buffer random access memory. The dual port buffer has a shift register output for holding a row of data from the random access memory. The buffer has two partitions, one containing, at consecutive locations, character data and attribute data, the other, character data and font data. In a first mode of operation using the first partition, data transferred to the shift register comprises character data to address the character generator store and attribute data for combination with font data retrieved from the character generator store to provide video data. In a second mode, using the second partition, character and font data transferred to the shift register is used to address and update the character generator store.