Intel 80312 I/O Companion Chip - ECEE

Intel ® 80312 I/O Companion ChipApplication Accelerator UnitTable 10-11. Accelerator Descriptor Control Register - ADCR (Sheet 3 of 3)IOPAttributes31rorvrvsbci b8cc b7cc b6cc b5cc b4cc b3cc b2cc b1cc28 24 20 16 12 8 4 0rv rv ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro ro roPCIAttributesna na na na na na na na na na na na na na na na na na na na na na na na na na na na na na na naIntel ® 80200 processor local bus address1828HAttribute Legend:RV = ReservedPR = PreservedRS = Read/SetRW = Read/WriteRC = Read ClearRO = Read OnlyNA = Not AccessibleBit Default Description09:07 006:04 003:01 000 0Block 3 Command Control - This bit field specifies the type of operation to be carried out on the datapointedatbySAR3register.000 Null command - This implies that Block 3 Data can be disregarded for the current chain descriptor. The ApplicationAccelerator does not transfer data from this block while processing the current chain descriptor.001 XOR command - This implies that Block 3 Data is transferred to the Application Accelerator to execute the XORfunction.010 Reserved011 Reserved100 Reserved101 Reserved110 Reserved111 ReservedBlock 2 Command Control - This bit field specifies the type of operation to be carried out on the datapointedatbySAR2register.000 Null command - This implies that Block 2 Data can be disregarded for the current chain descriptor. The ApplicationAccelerator does not transfer data from this block while processing the current chain descriptor.001 XOR command - This implies that Block 2 Data is transferred to the Application Accelerator to execute the XORfunction.010 Reserved011 Reserved100 Reserved101 Reserved110 Reserved111 ReservedBlock 1 Command Control - This bit field specifies the type of operation to be carried out on the datapointedatbySAR1register.000 Null command - This implies that Block 1 Data can be disregarded for the current chain descriptor. The ApplicationAccelerator does not transfer data from this block while processing the current chain descriptor.001 XOR command - This implies that Block 1 Data is transferred to the Application Accelerator to execute the XORfunction.010 Reserved011 Reserved100 Reserved101 Reserved110 Reserved111 Direct Fill - This implies that Block 1 Data is transferred directly from Intel ® 80200 processor local memory to thestore queue. In this instance, the data bypasses the Boolean Execution Unit within the Application Accelerator.Interrupt Enable - When set, the Application Accelerator generates an interrupt to the Intel ® 80200processor upon completion of a transfer. When clear, no interrupt is generated.Developer’s Manual 10-33