Boots – shoes – and leggings
Patent
1986-12-11
1988-11-29
Chan, Eddie P.
Boots, shoes, and leggings
G06F 300
Patent
active
047886382
ABSTRACT:
An apparatus transfers data between a plurality of input/output (I/O) devices and a main storage unit and includes a plurality of channel devices and a channel control unit. Each channel device is provided with a first data buffer for holding data to be transferred to and transferred from an I/O device. The channel control unit has an address register and a second data buffer. An address register is provided for each channel device, and holds an address of the main storage unit at which address the data to and from the I/O device is stored, and the second data buffer holds the data to be transferred to and transferred from the I/O device, which data is accessed based on the address designated by the address register. A data bus is connected between the first and second data buffers, the data bus having a bit capacity larger than that for data transfer between the I/O device and the channel device.
REFERENCES:
patent: 4065810 (1977-12-01), Cramer et al.
patent: 4067059 (1978-01-01), Derchak
patent: 4272815 (1981-06-01), Kadowaki et al.
patent: 4479179 (1984-10-01), Dinwiddie, Jr.
patent: 4494194 (1985-01-01), Harris et al.
Ninomiya Kazuhiko
Ogawa Tetsuji
Sato Tadashi
Shibata Hideaki
Yamagatu Ryo
Chan Eddie P.
Hitachi Limited
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