Boots – shoes – and leggings
Patent
1991-11-12
1992-08-11
Kriess, Kevin A.
Boots, shoes, and leggings
364DIG1, 364240, 3642402, 3642386, 364239, 3642408, 3642409, G06F 1338
Patent
active
051387034
ABSTRACT:
A method and apparatus for bus expansion, which provides a capability of transferring a data word from a first unit connected to a system bus to a second unit connected to an extension bus, with the first unit receiving a first read request input via the system bus, reading out the data word associated with the first read request, generating a first response in response to reading of the data word, and outputting the first response and the data word onto the system bus, and the second unit generating a second read request in response to an output start command supplied from a central processing unit (CPU) via the extension bus and receiving a second response and a data word from the extension bus. Responsive to the output start command supplied from the CPU, the first read request is selectively generated and output onto the system bus prior to generation of the second read request associated with the first read request. The output start command is also transferred from the CPU to the extension bus, and the data word is stored in a buffer memory responsive to a first response input via the first system bus. Responsive to the second read request input via the extension bus, the data word is selectively read out of the buffer memory and the second response is generated and outputted along with the data word onto the extension bus.
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Kabushiki Kaisha Toshiba
Kriess Kevin A.
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