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| Author: cyberez | 2-06-2010, 17:06 | Views: 20 |
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POST ABCs
The computer POST (Power On Self Test) tests the computer, insuring that it meets the necessary system requirements and that all hardware is working properly before starting the remainder of the boot process. If the computer passes the POST the computer will have a single beep (with some computer BIOS manufacturers it may beep twice) as the computer starts and the computer will continue to start normally. However, if the computer fails the POST, the computer will either not beep at all or will generate a beep code, which tells the user the source of the problem.
The steps of a POST
Each time the computer boots up the computer must past the POST. Below is the common steps a POST performs each time your computer starts.
- Test the power supply to ensure that it is turned on and that it releases its reset signal.
- CPU must exit the reset status mode and thereafter be able to execute instructions.
- BIOS checksum must be valid, meaning that it must be readable.
- CMOS checksum must be valid, meaning that it must be readable.
- CPU must be able to read all forms of memory such as the memory controller, memory bus, and memory module.
- The first 64KB ofmemory must be operational and have the capability to be read and written to and from, and capable of containing the POST code.
- I/O bus / controller must be accessible.
- I/O bus must be able to write / read from the video subsystem and be able to read all video RAM.
If the computer does not pass any of the above tests, your computer will receive an irregular POST. An irregular POST is a beep code that is different from the standard one or two beeps. This could be either no beeps at all or a combination of different beeps indicating what is causing the computer not to past the POST. |
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| Author: cyberez | 2-06-2010, 15:50 | Views: 154 |
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Dr Ismail Thamby, pakar sakit tuan menulis 10 Kaedah di dalam Harian Metro. Air mani ialah campuran cecair dari pundi prostat, pundi seminal, pundi cowpers, pepundi dalam salur kencing, cecair dari pundi epididimis dan sperma dari kilang sperma.
Ada 10 cara yang dapat membantu meningkatkan isi padu air mani, antaranya:
1. Jangan kerap bersetubuh kerana lebih kerap anda mencapai ejakulasi, isi padu air mani makin berkurangan dan cair. Jika ejakulasi selang tiga hari, air mani lebih mantap.
2. Elak tabiat merokok dan minum minuman keras. Kedua-dua perkara itu merendahkan tahap hormon testosterone yang mustahak untuk fungsi optima pundi yang menghasilkan air mani.
3. Lakukan senaman secara berkala. Lakukan senaman kegel atau kemut, iaitu mencengkam otot lantai pelvis atau otot pembukaan lubang najis dan lubang kencing.
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