Mode d'emploi AOPEN AP5TAQ

[. . . ] Appendix B Frequently Asked Question Note: FAQ may be updated without notice. If you cannot find the information that you need in this appendix, visit our WWW home page, (address: http://www. aopen. com. tw) and check the FAQ area and other new information. Q: How can I identify the mainboard BIOS version?A: The AOpen mainboard BIOS version appears on the upper-left corner of the POST (Power-On Self Test) screen. Normally, it starts with R and is found in between the model name and the date. [. . . ] A: For the convenience of over-clocking user, AP5T-2 adds jumper (JP5) for 75/83. 3MHz external CPU bus clock. All the circuit and components remain unchanged (including clock generator). The user set clock to 75/83. 3MHz is taking his own risk, and is probably to have system unstable behavior. There are also more features implemented on AP5T-3. Item Support 75/83. 3MHz Onboard Power Regulator 3. 3V, 2. 8V/2. 9V Overcurrent protection CPU Thermal Protection AP5T-3 Yes Switching Yes Yes AP5T-2 Yes Linear No No AP5T-1 No Linear No No B-6 Frequently Asked Question Q: What is the Ultra DMA/33?A: This is the new specification to improve IDE HDD data transfer rate. Unlike traditional PIO mode, which only uses the rising edge of IDE command signal to transfer data, the DMA/33 uses both rising edge and falling edge. Hence, the data transfer rate is double of the PIO mode 4 or DMA mode 2. The following table lists the transfer rate of IDE PIO and DMA modes. The IDE bus is 16-bit, which means every transfer is two bytes. Mode Clock per 33MHz PCI 30ns 30ns 30ns 30ns 30ns 30ns 30ns 30ns 30ns Clock count 20 13 8 6 4 16 5 4 4 Cycle time 600ns 383ns 240ns 180ns 120ns 480ns 150ns 120ns 120ns Data Transfer rate PIO mode 0 PIO mode 1 PIO mode 2 PIO mode 3 PIO mode 4 DMA mode 0 DMA mode 1 DMA mode 2 DMA/33 (1/600ns) x 2byte = 3. 3MB/s (1/383ns) x 2byte = 5. 2MB/s (1/240ns) x 2byte = 8. 3MB/s (1/180ns) x 2byte = 11. 1MB/s (1/120ns) x 2byte = 16. 6MB/s (1/480ns) x 2byte = 4. 16MB/s (1/150ns) x 2byte = 13. 3MB/s (1/120ns) x 2byte = 16. 6MB/s (1/120ns) x 2byte x2 = 33MB/s Q: What is the performance of Ultra DMA/33?A: You need driver to activate DMA/33, there are now driver from INTEL or you can use driver in the Windows 95 Memphis, which can recognize South Bridge PIIX4. We got the mass production sample Quantum Fireball ST1. 6A, following are the test result. MB CPU DRAM VGA CDROM OS : AOpen AP5T : P54C-200 Mhz : 16MB * 2 (FP-7) : AOpen PV60 : AOpen CD-920E (20X) : Win95 OSR2 B-7 Frequently Asked Questions Model OS/Driver Mode Winbench97 Disk Winmark (Business) 717 Winbench97 Disk Winmark (High End) 2150 Quantum Fireball 1. 2G Quantum Fireball 1. 2G Quantum ST1. 6A Quantum ST1. 6A Windows 95 OSR2 Windows 95 OSR2 + INTEL PIIX4 driver Windows 95 OSR2 Windows 95 OSR2 + INTEL PIIX4 driver PIO mode 4 DMA mode 2 822 3050 PIO mode 4 DMA/33 853 1040 2630 4020 Q: What is PnP (Plug and Play)?A: In the past, the IRQ/DMA and memory or I/O space of add-on cards are normally set manually, i. e. , by jumper or by proprietary utility. The user has to check the user's guide for the correct setting. Sometimes, resource conflict occurs and this leads to unstable system. The PnP specification suggests a standard register interface for both BIOS and OS (such as Win95). These registers are used by BIOS and OS to configure system resource and prevent any conflicts. The IRQ/DMA/Memory will be automatically allocated by PnP BIOS or OS. Currently, almost all the PCI cards and most ISA cards are PnP compliant. If you are still using a Legacy ISA card that cannot support PnP, set the corresponding resource (IRQ/DMA/memory) to ISA in the BIOS "PCI/PnP Setup". [. . . ] It is expected to be implemented under Windows'98. Q: Which version of the Windows '95 that I am using?B-12 Frequently Asked Question A: You may determine the version of Windows '95 by following steps. Double click "System" in "Control Panel". [. . . ]