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Thus, a new format was created for these in the CHD file. Compressed Hunks of Data, or CHD for short, are designed very specifically around the needs of mass storage media. Some arcade games, consoles, and PCs will require a CHD to run. As CHDs are already compressed, they should NOT be stored in a ZIP or 7Z file as you would for ROM images. 

Why do my Neo Geo ROMs no longer work? How do I get the Humble Bundle Neo Geo sets working? 

Recently the Neo Geo BIOS was updated to add a new version of the Universal BIOS. This was done between 0.171 and 0.172, and results in an error trying to load Neo Geo games with an un-updated neogeo.zip set. This also affects the Humble Bundle set: the games themselves are correct and up to date as of MAME 0.173 (and most likely will remain so) though you’ll have to pull the ROM set .ZIP files out of the package somehow yourself. However, the Neo Geo BIOS set (neogeo.zip) included in the Humble Bundle set is incomplete as of the 0.172 release of MAME. We suggest you contact the provider of your sets (Humble Bundle and DotEmu) and ask them to update their content to the newest revision. If enough people ask nicely, maybe they’ll update the package. 

It provides a means of recovering from, e.g.

• too high an overclock
• a typo in cmdline.txt
• an incorrect kernel=<filename> parameter
• an invalid display mode

without requiring a PC. (Obviously it won't help if you've deleted start.elf...) 

Connect pins 5 & 6 with a jumper or piece of wire.

If you are using these pins for your own purposes and want to avoid ending up in safe mode, add this to config.txt:

avoid_safe_mode=1

recalboxOS uses many awesome existing components, like EmulationStation2 as frontend, piFBA and Retroarch as emulators, RaspberryPI NOOBS as installation/recovery system. 

The USB interface to the DE0-nano is a USB-Blaster.

You can communicate from the host via a couple of mechanisms;

1) SLD Virtual JTAG core, and quartus_stp Tcl procedures

2) JTAG-to-Avalon-MM master and SystemConsole

3) Direct access via FTDI drivers 

While on the Home Screen:

Alt + Tab- Allows you to choose between open applications.

Crtl +Alt + Del- Restarts the device.

Esc*- (While in an application) Takes you back to the Home Screen.

Scroll Wheel (On a Mouse)- Allows you to switch home screen pages.

Crtl + W- Brings up the Menu to choose Wallpapers.

Crtl + P- Opens your Settings.

Crtl + M- Takes you to Manage Applications

Shift Key + Tab- Tab between applications on the screen.

Enter Key- To choose the application.

Left Click (and Hold)- Allows you to drag the application on the screen.

Context Menu Key- Opens your Menu.

Typing on the Screen- Directs it to the search bar.

Windows Key + E- Opens your Email.

Windows Key + P- Opens your Music.

Windows Key + A- Opens your Calculator.

Windows Key + L- Opens your Calendar.

Windows Key + C- Opens your Contacts.

Windows Key + B- Opens your Browser.

Crtl + Escape- Opens your Menu.

command ⌘

shift ⇧

option ⌥

control ⌃

caps lock ⇪

fn

Windows PC용 키보드를 사용하는 경우 option 키 대신 Alt 키와, command 키 대신 Windows 로고 키를 사용합니다. 일부 Mac 키보드와 단축키는 맨 위 행의 특수 키를 사용하며 볼륨, 디스플레이 밝기 및 기타 기능을 나타내는 아이콘이 여기에 해당합니다. 아이콘 키를 눌러 해당 기능을 수행하거나 fn 키와 결합하여 F1, F2, F3 또는 기타 표준 기능 키로 사용합니다. 

홈 버튼: command-H 

검색: command-스페이스 바

앱 전환: command-tab

전체 선택: command-A

오려두기: command-X