摘要:
A microprocessor suitable for processing a large quantity of graphics data. Graphics processing apparatus and method using the microprocessor are also disclosed. The microprocessor (1) independent of a CPU has two ports (102, 103), and performs an instruction fetch and a data access or a memory access simultaneously to two memories (3, 10; 3, 4, 10) coupled through separate buses. In the graphics processing apparatus in which this microprocessor is employed, the graphics transfer between a system memory (10) and a frame memory (4) can be performed at higher speed.
摘要:
A RAM mounted so as to mix with logic circuits has a plurality of memory mats and one control circuit provided for the plurality of memory mats. Arithmetic circuits for respectively performing +1 or -1 arithmetic operation are respectively provided so as to correspond to the respective memory mats and are electrically connected in cascade form. An input terminal of the initial-stage arithmetic circuit is supplied with address-setting fixed address signals. Input signals supplied to the next and subsequent arithmetic circuits or signals outputted therefrom are defined as own-assigned address signals (those assigned to the corresponding memory mats). A comparator provided in association with each arithmetic circuit referred to above makes comparisons for coincidence between the address signals and address signals input upon memory access. The corresponding memory mat is selected based on the resultant coincidence signal.
摘要:
A microprocessor comprises a processor unit (101) for decoding and executing an instruction, two ports (102, 103) each for transferring address, data and control signals between each of said ports and a respective memory connected thereto, and address buffer (1201-1, 1301-1) writable from said processor unit (101) and readable from said two ports (102, 103), a data buffer (1201-, 1301-2; 1201-3, 1301-3) which is readable and writable from said two ports (102, 103) and from which an instruction may be read by said processor unit (101), and means for controlling an address transfer from said address buffer to one of the memories and also a data transfer between said data buffer and one of the memories via the designated port according to a memory access request and a port designating signal from said processor unit, whereby an instruction fetch and a data access can be performed with respect to the two memories,
摘要:
A graphic processing apparatus comprises a graphic processor (1) and a first memory (3, 4); wherein said graphic processor comprises a first port (103) for transmission or reception of data to and from said first memory (3, 4) in synchronism with a first clock (7), and a second port (102) for transmission or reception of data to and from a CPU (8) in synchronism with a second clock (13); and said graphic processing device is so constructed that data can be transmitted between said first memory (3, 4) and said CPU (8) by employing said first port (103) and said second port (102).
摘要:
A data processor comprises a bus control circuit (14) adapted to be interfaced with a synchronous DRAM (22) which can be accessed in synchronism with a clock signal (CLK), a plurality of data processing modules (12, 13) coupled to said bus control circuit (14) for producing data and addresses for accessing a memory (22), and a clock driver (16) for feeding intrinsic operation clocks to said data processing modules (12, 13) and for feeding the clock signal for accessing said memory (22) in synchronism with the operations of said data processing modules (12, 13) to be operated by the operation clock signals, to the outside.
摘要:
A microprocessor suitable for processing a large quantity of graphics data. Graphics processing apparatus and method using the microprocessor are also disclosed. The microprocessor (1) independent of a CPU has two ports (102, 103), and performs an instruction fetch and a data access or a memory access simultaneously to two memories (3, 10; 3, 4, 10) coupled through separate buses. In the graphics processing apparatus in which this microprocessor is employed, the graphics transfer between a system memory (10) and a frame memory (4) can be performed at higher speed.