Secret Startup commands for Garmin(?)

에디슨님이 V 특수키를 올려주신적이 있었는데 다른기종들도 이와 비슷한 특수키가 있네요......그리고 재미있는 것들도 있네요. 가방끈이 짧아서 원문 그대로 올립니다. 이해해주세요.... Try this at your own risk! Secret Startup commands for Garmin handheldsSecret Startup Commands for Garmin handhelds There are several undocumented commands available, primarily at startup, on Garmin handheld receivers. This article will attempt to document some of the features available. I will try to document these in a universal way although details may differ depending on the unit you have. There are variations among models and among software releases within models. There is no attempt to provide 100% mapping to a particular model or release. Instead I have used a "try it" approach. I have documented what you may see and you will need to verify exactly what you did see. You may wish to print this out and check mark the features that are applicable to your unit. Note that these features are not documented by Garmin for a reason. They are generally for testing the device and are not intended for end users. The modes are not supported by Garmin and may cause you to lose data in your machines. One major feature that is revealed when using these undocumented test modes is that there is a thermometer inside your Garmin unit. The intent of this thermometer is to compensate the internal time-of-day clock for changes in temperature which will cause the internal crystal to drift. To a lesser extent it is also used to adjust the contrast of the display screen for temperature changes. It will not measure ambient temperature except when the unit is first turned on since the internal temperature is changed due to the heating effects of the electronics in the unit. The thermometer based correction works by building a table of correction values that are then applied to the internal clock. This is only used to obtain an initial fix since after the fix the satellite data is used to keep the clock accurate. Similarly while you have a fix the accurate clock can be used to update the temperature data in the table which means the unit will compensate for aging parts and even the complete loss of the table. Special key startup sequences The three keyboard keys on the right side of the unit have special significance if held down while powering on the unit. These keys are generally called page, mark, and enter. On the GIII units the center key is call menu but for our purposes it behaves the same. On Street Pilots the equivalent keyboard names will have to be used. These are page, option, and enter. See below for etrex and emap startup sequences. Other Garmin units typically have some of these special modes as well although the key sequences may be different. Page - Holding the page key down while powering up the unit will cause an immediate forced cold start. On the street pilot this is the only way to observe the software revision level. On the G-III this is reported to lose the temperature compensation data. Mark - Holding the mark key down while powering up will totally reset unit. You will lose all user supplied data and preferences. The machine will be set back to factory defaults. Be careful, there is no warning message. All data will be lost! On some units this feature has been documented in the manual and will offer a warning message before erasing. However, some versions of software, even on these machines, do not offer the warning. Do not depend on the documentation here. Have everything of value backed up before trying this. The big plus of this feature is that this reset can fix problems with the unit that will avoid having to send it back to Garmin. Etrex Startup modes The etrex also has secret modes for test purposes. Hold the "up" and "page" keys and then press the "on/off" button to enter this screen. It behaves similar to the test mode described above and shows some information that is useful to the user. Note that is has been reported that the ROM test may show a false failure on this screen since a factory tester is not attached. You can run the key tests by pressing each of the keys. You can use the page key to cycle through all of the display tests. The screen shows the status of the power on diagnostics plus internal battery voltage and external if present. A clock display shows seconds, the revision level of the software is shown, and a thermometer reading shows the internal temperature in degrees Celsius. Hold the "up" and "enter" keys and then press the "on/off" button to reset the entire machine. You will receive a warning prompt. You can avoid this message using the sequence "Page" plus "Enter" plus "Up" and then press the "on/off" button. Hold the keys down for 5 seconds to perform the reset. The newer etrex units with the "Click Stick" use different keys to accomplish these tasks but the idea is the same. Holding the click stick down and then powering up will enter the test screen while holding the "page" key down and the "click stick" down and then powering up will reset the unit. You will be prompted with an "are you sure?" message. On these units holding down the "find" button in addition to the others will avoid the are you sure message. Hold the buttons for 5 seconds to clear the unit. Note that the extra key sequence may be an even bigger master reset but this is not clear to me. ......(생략) On some units the battery voltage includes both internal and external voltages. The internal voltage is indicated in .03 volt increments and seems to have this accuracy. The external voltage is indicated with the similar precision but does not have this accuracy. The external voltage has the following decimal setting for each whole voltage setting: .14, .29, .43, .57, .72, .86, and .00. .....(생략) first published 99/1/4/99 added etrex 00/5/30 add emap 00/6/2 added III+ icon trick 00/7/5 added new etrex models 01/4/9 added 76 and alternate keys for etrex 01/12/22 Goto Working with Garmin TOC Dale DePriest