Abstract: An optical information recording medium includes a recording layer that includes a mark layer in which recording marks formed in accordance with condensed recording light are aligned and has a recording light absorption amount of 20.8% or less with respect to an innermost depth as a depth of the mark layer from a side thereof that the recording light enters to a side thereof that is most distant from the side that the recording light enters, and a change amount of a light absorption amount with respect to measurement light having a wavelength 10 nm shorter than that of the recording light at a time a light absorption amount with respect to measurement light having the same wavelength as the recording light is used as a reference, of 8.0% or more per 0.30 mm.

Abstract: An optical information recording medium includes a recording layer that includes a mark layer in which recording marks formed in accordance with condensed recording light are aligned and has a recording light absorption amount of 20.8% or less with respect to an innermost depth as a depth of the mark layer from a side thereof that the recording light enters to a side thereof that is most distant from the side that the recording light enters, and a change amount of a light absorption amount with respect to measurement light having a wavelength 10 nm shorter than that of the recording light at a time a light absorption amount with respect to measurement light having the same wavelength as the recording light is used as a reference, of 8.0% or more per 0.30 mm.

Abstract: An optical information recording medium includes a recording layer that absorbs recording light in accordance with its wavelength, the recording light being condensed for information recording, and increases the temperature in the vicinity of a focus so as to form a recording mark and that has properties of increasing a light absorption amount with respect to the wavelength of the recording light when light having the wavelength of the recording light is radiated.

Abstract: A microprocessor with a DMA controller for performing data transfers between a peripheral unit and a memory in response to a transfer request from the peripheral unit. The DMA controller includes a first memory block for storing information necessary to perform a current DMA data transfer and a second memory block for storing information necessary to perform the next DMA data transfer. The second DMA data transfer is initiated after completion of the first data transfer and the information stored in the second memory block is transferred to the first memory block. This process is repeated for all subsequent DMA data transfers. Each section of information stored in the first and second memory blocks includes the number of data transfers to be performed, a memory access address representing the location of the data to be transferred, and control/status information.

Abstract: A register circuit is disclosed which has input/output data lines, a first register having a first flip-flop and a first transfer gate provided between the input/output terminals of the flip-flop and the input/output data lines and connect them in response to a first selection signal, a second register having a second flip-flop and a second transfer gate provided between the input/output terminals of the flip-flop and the input/output data lines and connect them in response to a second selection signal, and a copy control circuit having a first and a second transistors, connected in series between the input/output terminals of the second flip-flop and the power terminals, to which are supplied stored data of the first flip-flop and a copy signal, respectively.