1. The R key on the keyboard is also called the reset key. Pressing it in the game will return to a fixed map. ?
2. The reset button on the desktop chassis is the "reset" button. ?
3. The notebook is above the keyboard, and the reset key is the "reset" key. ?
Reset is the reset button. Some computers have them and some don't, but they are usually available on old computers.
Restart key
edit
function
Its function is to press this key when the electronic product or computer crashes, so that it can be restarted without power failure.
principle of operation
The reset key is started after clearing the current CPU and running data. It does not involve power failure.
All reset signals on the motherboard are generated by the chipset, mainly by the South Bridge (with reset system controller inside) or the reset generator (74H series chips), which means that all devices and modules on the motherboard need to be reset by the South Bridge. If the South Bridge wants to generate a reset signal or if the South Bridge wants to reset other devices and modules, it needs to reset itself or have its own reset source first. The reset source of South Bridge is the gray line of ATX power supply (the gray line is 5v in normal state and 5V after work, and the gray line of ATX power supply is also PG signal), or the PG signal sent by the system power management chip.
First of all, after the power supply is started, ATX power supply sends out power supply normal signal PWRER OK, that is, ATX PWRGD, which is shaped by inverter HCT 14 and then outputs CLROFF signal, which enters South Bridge 8237 1 to clear its internal register, and is also input to NAND gate HC 132. When the voltage reaches the rated value and is stable, the voltage control chip sends out a VRMPWRGD signal, which is also input to VHC 132. These two signals enter VHC 132X logic operation, and the output signal is shaped by HCT 14, and then output to the south bridge by PIN 10 of HCT 14. Because the gray line powered by ATX will have a delay process at the moment of power supply.
That is to say, when the ATX power supply works, the gray line will change from low level to high level, that is, the level signal of 0~ 1 Instantaneous level signal of 0~ 1 will directly or indirectly act on the reset system controller of South Bridge. First, reset the South Bridge and the North Bridge themselves. When the South Bridge is reset, the reset system controller in the South Bridge will send out the RSTDRV signal. The gray line 5V signal decomposes to form ISARST, IDERSTDRV resets ISA slot and IDE interface, sends out PCIRST signal, and resets PCI slot. The North Bridge generates a CPU reset signal, and the motherboard starts to work after the reset. If it is a PG signal sent by the power manager, this signal is also a jump process of 0~ 1 at the moment of power-on. This signal will also repeat the above actions to reset the south bridge, and the south bridge will send it again.
On some motherboards, the PG signal of CPU is directly provided by the PG signal of power manager, while others are indirectly provided by the gray line of ATX power supply. Usually, the reset circuit on the motherboard is controlled by a reset switch, with one end at low level and the other end at high level. The low level is usually grounded, and the high level is indirectly powered by the red line and the gray line. One end of the reset key, usually 3.3V, will also directly or indirectly act on the reset system controller of the South Bridge. When the microcomputer needs to be forcibly reset, the reset switch will be short-circuited instantly. The high-level end of the switch will generate a low-level signal, which directly or indirectly acts on the reset system controller in the South Bridge, so that after the South Bridge is forcibly reset, the South Bridge will also forcibly reset other devices and modules, thus realizing a forced reset process, which is commonly called cold start. When pressing CTRL+ALT+DEL key for hot start, 37 1 will send out BIOSRST signal.