公开(公告)号：US5548762A

公开(公告)日：1996-08-20

申请号：US227867

申请日：1994-04-14

申请人： Tadhg Creedon ,  John Hickey ,  Eugene G. O'Neil

发明人： Tadhg Creedon ,  John Hickey ,  Eugene G. O'Neil

IPC分类号： G06F13/24 ,  G06F13/22

CPC分类号： G06F13/24

摘要： An implementation efficient interrupt select mechanism which allocates interrupt flags between N interrupt requestors, e.g. communication channels. A multi-channel controller provides the select mechanism with control signals and asserts an interrupt request when a channel, being visited by a scanner, which may be incorporated into the controller, is asserting an interrupt request. If the interrupt flag is available, the number of the channel asserting the request is locked into a latch. The latch remains locked until the interrupt request is cleared, a control signal is received from the controller and the channel being visited by the scanner equals the channel number stored in the latch. The scanner increments from channel to channel regardless of the assertion of the interrupt flag or the locking of the latch. In this manner, a single scanner may be used with any number or interrupt select mechanisms.

摘要翻译： 一种实现有效的中断选择机制，其在N个中断请求者之间分配中断标志。 沟通渠道 多通道控制器为选择机构提供控制信号，并且当扫描仪访问的通道可能并入控制器时，断言中断请求时断言中断请求。 如果中断标志可用，则声明请求的通道的数量被锁定到锁存器中。 锁存器保持锁定，直到中断请求被清除，从控制器接收到控制信号，扫描仪访问的通道等于存储在锁存器中的通道号。 扫描器从通道递增，而不管中断标志的置位或锁存器的锁定。 以这种方式，可以使用单个扫描器与任何数量或中断选择机构。