发明名称 |
PROTOCOL FOR TRANSFER OF DMA DATA |
摘要 |
A process for transferring data via DMA between a system resource and a controller via switching logic. During a setup write transaction, the switching logic is set up to enable DMA data to be transferred between a particular system memory and a selected system resource. The setup write transaction also is used to initialize the DMA byte counter. During a subsequent write transaction, DMA pointer registers are initialized with appropriate starting addresses. The controller then transmits a DMA start code and the system resource responds by transmitting an acknowledge code. At that time, DMA data is transmitted between the controller and the system resource via the switching logic. |
申请公布号 |
CA2022250(A1) |
申请公布日期 |
1991.02.02 |
申请号 |
CA19902022250 |
申请日期 |
1990.07.30 |
申请人 |
DIGITAL EQUIPMENT CORPORATION |
发明人 |
BISSETT, THOMAS D.;THIRUMALAI, AJAI;BRUCKERT, WILLIAM;AMIRMOKRI, JAY |
分类号 |
G06F13/42;G06F9/445;G06F11/00;G06F11/08;G06F11/10;G06F11/14;G06F11/20;G06F11/22;G06F11/267;G06F13/28;(IPC1-7):G06F13/00 |
主分类号 |
G06F13/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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