Mode d'emploi AOPEN AP5VMAQ

[. . . ] 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. [. . . ] Chipset can then detect and report the system configuration right after power on. Then we can have true jumperless mainboard. Q: What is PBSRAM (Pipelined Burst SRAM)?A: For Pentium CPU, the Burst means reading four QWord (Quad-word, 4x16 = 64 bits) continuously with only the first address decoded by SRAM. The PBSRAM will automatically send the remaining three QWord to CPU according to predefined sequence. The normal address decoding time for SRAM is 2 to 3 clocks. This makes the CPU data read timing of four QWord to be at least 3-2-2-2 and a total of 9 clocks if traditional asynchronous SRAM is used. However, with PBSRAM, there is no need to decode address for rest three Qword. Therefore, data read timing can be 3-1-1-1, that is equivalent to 6 clocks and is faster than asynchronous SRAM. Q: What is EDO (Extended Data Output) memory?A: The EDO DRAM technology of EDO is actually very similar to FPM (Fast Page Mode). Unlike traditional FPM that tri-states the memory output data to start the pre-charge activity, EDO DRAM holds the memory data valid until the next memory access cycle, that is similar to pipeline effect and reduces one clock state. A: The SDRAM is a new generation DRAM technology that allows DRAM to use the same clock as the CPU host bus (EDO and FPM are asynchronous and do not have clock signal). The idea is the same as "Burst" (refer to the previous Q & A). It requires only one clock for the 2nd, 3rd, and 4th QWord (for example, 5-1-1-1 compares with EDO 5-2-2-2). The SDRAM comes in 64-bit 168-pin DIMM (Dual-in-line Memory Module) and operates at 3. 3V. Note that some old DIMMs are made by FPM/EDO and only operate at 5V. AOpen is the first company to support dual-SDRAM DIMMs onboard (AP5V), from Q1 1996. B-4 Frequently Asked Questions Q: Can SDRAM DIMM work together with FPM/EDO SIMM?A: The FPM/EDO operate at 5V while SDRAM operates at 3. 3V. The current MB design provides different power to DIMM and SIMM but connects the data bus together. If you combine SIMM and DIMM, the system will still work fine; however, only temporarily. [. . . ] Note that the Deturbo mode has been removed in new MBs since these require more code space in Flash ROM. B-7 Frequently Asked Questions Q: Power Management Icon does not appear in the Windows 95 Control Panel even though the APM under BIOS Setup is enabled. A: This problem occurs if you did not enable the APM function before you install Windows 95. If you have already installed Windows 95, re-install it after the BIOS APM function is enabled. [. . . ]