公开(公告)号：AU567569B2

公开(公告)日：1987-11-26

申请号：AU3022684

申请日：1984-07-03

Applicant: IBM

Inventor： KUMMER DAVID ALLEN ,  SAENZ JESUS ANDRES ,  TRYNOSKY STEPHEN WAYNE

IPC: G09G5/00 ,  G06F3/00 ,  G06F3/14 ,  G06F7/02 ,  G06T7/00 ,  G09G1/16 ,  G09G5/02 ,  G09G5/393 ,  G09G5/395 ,  G06F3/153

Abstract: In a bit mapped raster scan digital display system, a number of maps (MAPO-MAP3), each contain a single component of the display data and are read together to provide sets of bytes, each set representing eight pel defining groups. A compare system is provided for determining when a pel group in a set of bytes compares with a reference pel defining group. For the, or each, pair of maps, the compare system compares each bit of the two bytes of data with the correspondingly positioned bit of the reference group to provide outputs when a corresponding bit in each of the bytes compares with the two reference bits. When more than two maps are employed the compare outputs related to all of the pairs of maps are combined to provide an output signal when a pel group in a byte from the maps compares with the reference bits. In a modification of the system, the comparison can be made between one or more of the maps and the corresponding bit or bits of the compare data.

公开(公告)号：BR8404042A

公开(公告)日：1985-07-16

申请号：BR8404042

申请日：1984-08-13

Applicant: IBM

Inventor： KUMMER DAVID ALLEN ,  SAENZ JESUS ANDRES ,  TRYNOSKY STEPHEN WAYNE

IPC: G09G5/00 ,  G06F3/00 ,  G06F3/14 ,  G06F7/02 ,  G06T7/00 ,  G09G1/16 ,  G09G5/02 ,  G09G5/393 ,  G09G5/395 ,  G09G1/00

Abstract: In a bit mapped raster scan digital display system, a number of maps (MAPO-MAP3), each contain a single component of the display data and are read together to provide sets of bytes, each set representing eight pel defining groups. A compare system is provided for determining when a pel group in a set of bytes compares with a reference pel defining group. For the, or each, pair of maps, the compare system compares each bit of the two bytes of data with the correspondingly positioned bit of the reference group to provide outputs when a corresponding bit in each of the bytes compares with the two reference bits. When more than two maps are employed the compare outputs related to all of the pairs of maps are combined to provide an output signal when a pel group in a byte from the maps compares with the reference bits. In a modification of the system, the comparison can be made between one or more of the maps and the corresponding bit or bits of the compare data.

公开(公告)号：BR8403983A

公开(公告)日：1985-07-09

申请号：BR8403983

申请日：1984-08-09

Applicant: IBM

Inventor： KUMMER DAVID ALLEN

IPC: G06F3/12 ,  G06F3/153 ,  G06F12/00 ,  G06F12/06 ,  G06F13/00 ,  G06K15/00 ,  H04N9/00 ,  G11C15/00

Abstract: A microcomputer includes a main memory system which is accessed, substantially independently, by the CPU and a subsystem, for example a video display subsystem (12,11). The memory system comprises a base memory (22) and an optional add-ori expansion memory (42). When only the base memory is installed, consecutive locations have consecutively numbered addresses, and both the CPU and subsystem access individual locations. When both memories are installed, one has even numbered addresses and the other odd numbered addresses. With both memories installed, the CPU still accesses individual locations, but the subsystem addresses even addresses to obtain, for each access, data from the even address and the next higher odd address, thereby accessing a location in both memories. Thus the memory bandwith for the subsystem is effectively doubled when the expansion memory is installed.

公开(公告)号：ZA845185B

公开(公告)日：1985-03-27

申请号：ZA845185

申请日：1984-07-05

Applicant: IBM

Inventor： KUMMER DAVID ALLEN ,  WEBB GARY EDWARD

IPC: G11C17/00 ,  G06F9/04 ,  G06F12/06 ,  G06F13/00 ,  G06F17/00 ,  G11C5/00 ,  G06C

Abstract: A microcomputer system employs internal read-only memory devices (3,4) and external read-only memory devices (41,42) in plug-in cartridges (2). Each cartridge includes jumper links (43.44,45,50,51,52) in leads (31,32,33,34,35,36) from the external memories through the cartridge socket (23) to a memory select unit and jumper links (38,39) in leads from earth through the cartridge socket to enable inputs (E) of the internal memories. By linking selected ones of the jumper links in the cartridge, the external memory can be used as an add-on memory or as a base memory replacing the internal memory.

公开(公告)号：GB2145308A

公开(公告)日：1985-03-20

申请号：GB8416919

申请日：1984-07-03

Applicant: IBM

Inventor： KUMMER DAVID ALLEN ,  SAENZ JESUS ANDRES ,  TRYNOSKY STEPHEN WAYNE

IPC: G09G5/00 ,  G09G5/34 ,  G09G5/395 ,  G06F3/153

Abstract: In a raster scan digital display system, a display image is stored, as coded characters or a bit map, which is larger than the display image. In order to define an image, within the stored image, for display, the addressing system for the memory (or memories) storing the image include a display image defining circuit. This circuit includes an address counter which is incremented to define successive addresses of data in a line of the displayed image, or row of characters therein. The circuit includes a first register to receive the initial address of a display image and a second register to receive a value indicating the width of the stored image. For the initial line (or character row) of a displayed image, the address counter is loaded from the first register and incremented from the initial address. For each subsequent line (or character row) the address from which the counter is incremented is the sum of the initial address of the previous line (or character row) and the value in the second register.

公开(公告)号：AU3022684A

公开(公告)日：1985-02-21

申请号：AU3022684

申请日：1984-07-03

Applicant: IBM

Inventor： KUMMER DAVID ALLEN ,  SAENZ JESUS ANDRES ,  TRYNOSKY STEPHEN WAYNE

IPC: G09G5/00 ,  G06F3/00 ,  G06F3/14 ,  G06F7/02 ,  G06T7/00 ,  G09G1/16 ,  G09G5/02 ,  G09G5/393 ,  G09G5/395 ,  G06F3/153

Abstract: In a bit mapped raster scan digital display system, a number of maps (MAPO-MAP3), each contain a single component of the display data and are read together to provide sets of bytes, each set representing eight pel defining groups. A compare system is provided for determining when a pel group in a set of bytes compares with a reference pel defining group. For the, or each, pair of maps, the compare system compares each bit of the two bytes of data with the correspondingly positioned bit of the reference group to provide outputs when a corresponding bit in each of the bytes compares with the two reference bits. When more than two maps are employed the compare outputs related to all of the pairs of maps are combined to provide an output signal when a pel group in a byte from the maps compares with the reference bits. In a modification of the system, the comparison can be made between one or more of the maps and the corresponding bit or bits of the compare data.

公开(公告)号：IT8419881D0

公开(公告)日：1984-03-02

申请号：IT1988184

申请日：1984-03-02

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  KUMMER DAVID ALLEN ,  LANGGOOD JOHN KENNEDY

IPC: H05K1/00 ,  H05K1/02 ,  H05K

Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 to which eight other cards controlling various I/O devices can be connected. Seven of the eight I/O connectors are interconnected to a conventional I/O bus. The eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.