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. [. . . ] 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. 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". Q: What is ACPI (Advanced Configuration & Power Interface) and OnNow?A: The ACPI is new power management specification of 1997 (PC97). 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. The idea is a bit similar to the PnP register interface. 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?A: Following is the compare table of TX+SDRAM, VX+SDRAM, TX+EDO, HX+EDO and VX+EDO. CPU DRAM HDD VGA OS Chipset Intel 430VX Intel 430HX Intel 430TX Intel 430VX Intel 430TX : Pentium PP/MT (P55C) 200MHz :16MB EDO or SDRAM : Quantum Fireball 1280AT : AOpen PV60 S3 Trio64V+ 800x600x256 Small font : Windows 95 OSR2 Model AP5VM AP53/AP5K AP5T/AX5T AP5VM/AP5V AP5T/AX5T DRAM EDO EDO EDO SDRAM SDRAM Timing 6-2-2-2 5-2-2-2 5-2-2-2 6-1-1-1 5-1-1-1 Winstone96 86. 1 86. 8 87. 3 86. 6 87. 7 Q: Does Pentium or Pentium Pro MB support Deturbo mode? [. . . ] Then we can have true jumperless mainboard. Q: What is the difference of Synchronous and Asynchronous Switching Regulator?A: Switching regulator turns on/off Power FET with very high frequency and uses L/C charge and discharge circuit to do voltage drop. Most of the current switching designs are Asynchronous mode, which from the technical point of view, uses Schottky diode for current loop back when power FET is off, and still consumes very high power as well as heat. AOpen AP5T-3/AX5T-3 implement high efficient Synchronous switching design that uses MOS FET for the current loop back and synchronous with the major Power FET (One is on, the other will be off. ). [. . . ]