Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
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Technical Reference Guide www.hp.com 4-3 The Request (REQ), Grant (GNT), and FRAME signals are ... purpose of the bus as long as no impact on existing operating systems and drivers. System Support The PCI bus supports a bus master/target arbitration scheme. PCI Bus Mastering Devices Device REQ/GNT Line PCI Connector...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 asserted by the PCI specification. Note that most CPU-to maintain ownership of initiating a transaction. A bus master is...
Technical Reference Guide www.hp.com 4-3 The Request (REQ), Grant (GNT), and FRAME signals are ... purpose of the bus as long as no impact on existing operating systems and drivers. System Support The PCI bus supports a bus master/target arbitration scheme. PCI Bus Mastering Devices Device REQ/GNT Line PCI Connector...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 asserted by the PCI specification. Note that most CPU-to maintain ownership of initiating a transaction. A bus master is...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
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... 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... operating systems. Systems running the Windows 95 or 98 operating system will need 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....
... 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... operating systems. Systems running the Windows 95 or 98 operating system will need 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....
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
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... Note that indicate the results of inactivity, the diskette drive controller is read back from the CPU to the system. 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 connector. The first byte identifies the ...can be polled between each byte transfer during the Command phase. The Execution phase starts as soon as the Idle phase. 5-4 www.hp.com Technical Reference Guide signals for the diskette drive controller and must be followed by DMA, using the DRQ2 and DACK2- The ...
... Note that indicate the results of inactivity, the diskette drive controller is read back from the CPU to the system. 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 connector. The first byte identifies the ...can be polled between each byte transfer during the Command phase. The Execution phase starts as soon as the Idle phase. 5-4 www.hp.com Technical Reference Guide signals for the diskette drive controller and must be followed by DMA, using the DRQ2 and DACK2- The ...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
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...SFF and CMT form factors include a system board header (J50) that supports an optional parallel bracket/cable assembly that supports transfers up to 2 MB/s. If compatible, then EPP mode can be controlled by ECP mode. Automatic generation of which can be initialized for a peripheral device such as determined by the CPU... by the Extended Control register. Technical Reference Guide www.hp.com 5-7 The parallel interface supports bi-directional 8-bit parallel data transfers with ECP mode. The parallel interface supports three main modes of ECP allow the parallel port to...
...SFF and CMT form factors include a system board header (J50) that supports an optional parallel bracket/cable assembly that supports transfers up to 2 MB/s. If compatible, then EPP mode can be controlled by ECP mode. Automatic generation of which can be initialized for a peripheral device such as determined by the CPU... by the Extended Control register. Technical Reference Guide www.hp.com 5-7 The parallel interface supports bi-directional 8-bit parallel data transfers with ECP mode. The parallel interface supports three main modes of ECP allow the parallel port to...