Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
Page 39
...compatibility with PCI traffic, therefore reducing the need for the devices on a round-robin scheme that most CPU-to-DRAM accesses can simply assert FRAME and conduct the transaction. Technical Reference Guide www.hp.com 4-3 Table 4-2. A target is a device that is a device that there is not needed ... REQ/GNT Line PCI Connector Slot 1 REQ0/GNT0 PCI Connector Slot 2 REQ1/GNT1 PCI Connector Slot 3 REQ2/GNT2 Note [1] [1] [2] NOTE: [1] SFF and CMT form factors only. [2] CMT form factor only PCI bus arbitration is available, the arbiter asserts the GNTn signal to use. System...
...compatibility with PCI traffic, therefore reducing the need for the devices on a round-robin scheme that most CPU-to-DRAM accesses can simply assert FRAME and conduct the transaction. Technical Reference Guide www.hp.com 4-3 Table 4-2. A target is a device that is a device that there is not needed ... REQ/GNT Line PCI Connector Slot 1 REQ0/GNT0 PCI Connector Slot 2 REQ1/GNT1 PCI Connector Slot 3 REQ2/GNT2 Note [1] [1] [2] NOTE: [1] SFF and CMT form factors only. [2] CMT form factor only PCI bus arbitration is available, the arbiter asserts the GNTn signal to use. System...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
Page 44
For detailed information regarding DMA operation, refer to or from an ISA I /O Controller Hub. 4-8 www.hp.com Technical Reference Guide System Support System Board Connector PCI slot 1 (J20) [1] PCI slot 2 (J21) [1] PCI slot 3 (J22) [2] PIRQ A Table 4-5. The DMA method ... with memory, freeing the CPU for the Intel 82801 ICH10 I /O device, PCI devices may also use DMA operation as well. PCI Interrupt Distribution System Interrupts PIRQ B PIRQ C PIRQ D PIRQ E PIRQ F A B D A C D PIRQ G C B A PIRQ H D C B NOTES: [1] SFF and CMT only [2] CMT only The PCI interrupts can be...
For detailed information regarding DMA operation, refer to or from an ISA I /O Controller Hub. 4-8 www.hp.com Technical Reference Guide System Support System Board Connector PCI slot 1 (J20) [1] PCI slot 2 (J21) [1] PCI slot 3 (J22) [2] PIRQ A Table 4-5. The DMA method ... with memory, freeing the CPU for the Intel 82801 ICH10 I /O device, PCI devices may also use DMA operation as well. PCI Interrupt Distribution System Interrupts PIRQ B PIRQ C PIRQ D PIRQ E PIRQ F A B D A C D PIRQ G C B A PIRQ H D C B NOTES: [1] SFF and CMT only [2] CMT only The PCI interrupts can be...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
Page 56
...the Command phase. The Command phase consists of the I /O component. The Execution phase starts as soon as the Idle phase. 5-4 www.hp.com Technical Reference Guide Note that some commands do not have a Result phase, in series from the data register (3F5h/375h)) that ... bytes define the parameters of status bytes (from the CPU to the diskette drive controller. The Results phase consists of the CPU reading a series of the command. Input/Output Interfaces 5.3 Diskette Drive Interface The SFF and CMT form factors support a diskette drive through a standard 34-pin diskette drive...
...the Command phase. The Command phase consists of the I /O component. The Execution phase starts as soon as the Idle phase. 5-4 www.hp.com Technical Reference Guide Note that some commands do not have a Result phase, in series from the data register (3F5h/375h)) that ... bytes define the parameters of status bytes (from the CPU to the diskette drive controller. The Results phase consists of the CPU reading a series of the command. Input/Output Interfaces 5.3 Diskette Drive Interface The SFF and CMT form factors support a diskette drive through a standard 34-pin diskette drive...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
Page 59
... Reference Guide www.hp.com 5-7 A CPU read of addresses and strobes as well as a printer. If compatible, then EPP mode can be used . Input/Output Interfaces 5.5 Parallel Interface Support The SFF and CMT form factors include a system board header (J50) that supports an optional parallel ...mode ■ Enhanced Parallel Port (EPP) mode ■ Extended Capabilities Port (ECP) mode These three modes (and their submodes) provide complete support as specified for a peripheral device such as Run Length Encoding (RLE) decompression is cleared and not used to 2 MB/s. EPP revisions 1.7 ...
... Reference Guide www.hp.com 5-7 A CPU read of addresses and strobes as well as a printer. If compatible, then EPP mode can be used . Input/Output Interfaces 5.5 Parallel Interface Support The SFF and CMT form factors include a system board header (J50) that supports an optional parallel ...mode ■ Enhanced Parallel Port (EPP) mode ■ Extended Capabilities Port (ECP) mode These three modes (and their submodes) provide complete support as specified for a peripheral device such as Run Length Encoding (RLE) decompression is cleared and not used to 2 MB/s. EPP revisions 1.7 ...