User manual AOPEN AX5TAQ

[. . . ] 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. [. . . ] Note that it is different with master/slave mode of the IDE device connection. For more details, refer to section 2. 3 "Connectors". B-5 Frequently Asked Questions 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. 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-6 Frequently Asked Questions Model OS/Driver Mode Winbench97 Disk Winmark (Business) 717 822 853 1040 Winbench97 Disk Winmark (High End) 2150 3050 2630 4020 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 PIO mode 4 DMA/33 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. 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. 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". Q: What is ACPI (Advanced Configuration & Power Interface) and OnNow?It intends to save more power by taking full control of power management to operating system and not through BIOS. Because of this, the chipset or super I/O chip needs to provide standard register interface to OS (such as Win97) and provides the ability for OS to shutdown and resume power of different part of chip. ACPI defines momentary soft power switch to control the power state transition. The four digital represents the clocks needed for 1st-2nd-3rd-4th QWord. Notice that the Intel HX + EDO or SIS 5571+ EDO are almost the same as VX + SDRAM and the TX + SDRAM has the best performance among Pentium chipsets. Please note AP57 does not support SDRAM. B-8 Frequently Asked Questions P5 Chipset Intel 430FX Intel 430VX Intel 430HX Model AP5C/P AP5VM/ AP5V AP53/ AP5K/ AX53 AP5T/ AX5T AP57 AP58/ AX58 PBSRAM 3-1-1-1 3-1-1-1 3-1-1-1 FPM 7-3-3-3 6-3-3-3 6-3-3-3 EDO 7-2-2-2 6-2-2-2 5-2-2-2 SDRAM NA 6-1-1-1 NA Intel 430TX SIS 5571 SIS 5582 3-1-1-1 3-1-1-1 3-1-1-1 6-3-3-3 5-3-3-3 5-3-3-3 5-2-2-2 4/5-2-2-2 4/5-2-2-2 5-1-1-1 (6/7-1-1-1) 6/7-1-1-1 Q: What is the memory performance improvement of TX chipset? [. . . ] If the setting is wrong, it will cause system unstable or damage after long time use. The other disadvantage is, because some of the B-13 Frequently Asked Questions jumper setting information is stored in CMOS, if the battery is lost or BIOS setup is accidentally changed, end user (or distributor) may need to open the housing and check the CPU again. Most of all, you need a start voltage to boot CPU and go into BIOS for jumperless setting. 2. 85V may be OK for P55C and K6-166, but minimum voltage of K6-233MHz is 3. 1V, it can not boot if user plugs K6-233 onto current jumperless mainboard. [. . . ]