the PCI Bus demystified phần 8 docx

... 4 INTA# INTB# INTC# INTD# P1 pin A3 B3 C3 E3 Slot 8 1 48 CompactPCI is just an industrial version of the same PCI bus found in most contemporary PCs. It is electrically compatible with PCI and uses the same protocol. For ... over the P1 and P2 pins on the rear of the backplane, parallel to the backplane. The advantage to rear-mounted bridges, whether perpendicular or pa...

Ngày tải lên: 07/08/2014, 11:22

... referring to the signal level on the PCI pins and not to the voltage that powers the board. The motherboard (including connectors) defines the signaling environment for the bus, whether it be 5V ... ACK64#. PCI Bus Demystified 60 supply the interrupt vector. The C/BE# bus indicates which bytes of the interrupt vector are valid. Because PCI is processor indepen...

Ngày tải lên: 07/08/2014, 11:22

... monopolize the bus. This violates the low-latency spirit of the PCI spec. On the other hand, the specification does allow the notion of bus parking.” The arbiter may be designed to “park” the bus on ... While the choice of a default master is up to the system designer, the specification recommends parking on the last master that acquired the bus. PCI Bus...

Ngày tải lên: 07/08/2014, 11:22

... immediately issues a retry to the master and begins executing the transaction internally. This allows the bus to be used by other masters while the target is busy. PCI Bus Demystified 39 least significant ... location 8. The first transfer is to location 8, the second to location C hex which is the end of the cache line. The third data phase is to address 0 and th...

Ngày tải lên: 07/08/2014, 11:22

... through to the PCI bus. PCI Bus Demystified Figure 6-1: x86 configuration address. Driving IDSEL A device is selected as the target of a configuration transaction by asserting its IDSEL pin. The specification ... Vendor ID: Identifies the vendor of the device. More specifically, it identifies the vendor of the PCI silicon. PCI Bus Demystified Figure 6-3: Type 0...

Ngày tải lên: 07/08/2014, 11:22

... any of four modes: ■ Real Mode. The original 80 88, 1 Mbyte address space ■ 16-bit Protected Mode. The 80 286 , 16 Mbyte address space ■ 32-bit Protected Mode. The 80 386 and above, 4 Gbyte address ... 8- bit ID code assigned by the PCI SIG, an 8- bit offset to the next element in the list and some number of additional bytes that may be either read-only or read/writable. T...

Ngày tải lên: 07/08/2014, 11:22

... sees the transaction. Bridge 3 passes the transaction Figure 8- 5: Bus number registers. Host Bridge 0 CPU Host Bus PCI Device PCI- PCI Bridge 3 PCI- PCI Bridge 1 PCI Bus 0 PCI Bus 1 PCI Bus 3 PCI- PCI Bridge ... bridge hierarchy. Host -PCI Bridge Memory CPU Host Bus PCI Device PCI- PCI Bridge 1 PCI- ISA Bridge PCI- PCI Bridge 2 PCI Device PCI Device PCI...

Ngày tải lên: 07/08/2014, 11:22

... insertion event the system activates the software connection process for the inserted board. For an extraction event the system activates the PCI Bus Demystified 175 the active bus. Note that there is ... termination of the bus signals. CompactPCI 169 ■ Power up the slot ■ Deassert RST# and connect the slot to the bus, in either order. ■ Change the optional slo...

Ngày tải lên: 07/08/2014, 11:22

... AD[50] 78 AD[49] Gnd 79 +Vio (4 ) AD[ 48] 80 AD[47] AD[46] 81 AD[45] Gnd 82 Gnd AD[44] 83 AD[43] AD[42] 84 AD[41] +Vio (1) 85 Gnd AD[40] 86 AD[39] AD[ 38] 87 AD[37] Gnd 88 +Vio (1) AD[36] 89 AD[35] ... 69–70 timing, 81 84 , 87 88 Error detection and reporting: PAR, 51 PERR, 51 SERR, 53–54 Expansion ROM base address register, 107–1 08 Extensions to PCI: 64–bit, 62–63 66 MH...

Ngày tải lên: 07/08/2014, 11:22

... detail. Figure 1-2: Functional diagram of the VL Bus. The VL Bus solved the bandwidth problem (in the short term anyway). On a 33 MHz, 32-bit processor bus, the VL Bus could achieve 132 Mbytes/sec. VESA ... heart. 11 compatible with the 486 bus. But the principal drawback of the VL Bus is that it’s processor-specific. As soon as the Pentium came out, it was no longe...

Ngày tải lên: 07/08/2014, 11:22