emulation

table of functions vs switch in golang

ぐ巨炮叔叔 提交于 2019-12-06 00:51:30
问题 im am writing a simple emulator in go (should i? or should i go back to c?). anyway, i am fetching the instruction and decoding it. at this point i have a byte like 0x81, and i have to execute the right function. should i have something like this func (sys *cpu) eval() { switch opcode { case 0x80: sys.add(sys.b) case 0x81: sys.add(sys.c) etc } } or something like this var fnTable = []func(*cpu) { 0x80: func(sys *cpu) { sys.add(sys.b) }, 0x81: func(sys *cpu) { sys.add(sys.c) } } func (sys *cpu

Simulate or Virtual Twain source for Twain development [closed]

对着背影说爱祢 提交于 2019-12-06 00:46:37
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . For developing a web based scan solution, I would love to test it on Windows or Mac without actually hooking up a scanner to my box. So is there a program/tool that emulates or gives me a virtual twain source with some default image data? 回答1: The Twain sample driver that comes along with the twain sample

Installing a prebuilt binary on Android: “not found”

|▌冷眼眸甩不掉的悲伤 提交于 2019-12-05 23:25:07
问题 I'm trying to install a prebuilt binary in a custom Android image. For that I have copied it to a new directory in prebuilt/android-arm/ with an Android.mk file similar to this one: LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_SRC_FILES := binary_name LOCAL_MODULE := binary_name LOCAL_MODULE_CLASS := EXECUTABLES include $(BUILD_PREBUILT) So if I run make system_image binary_name , the binary file is copied to /bin/ in system image. And if I run the emulator I can see the binary

Installing Android emulator without eclipse

旧巷老猫 提交于 2019-12-05 18:19:44
How do I install an android emulator on a computer without eclipse? Yugandhar Babu No need to install eclipse for android emulator. Just download the android sdk and install it. You have to install JDK before installing android SDK. After completion of successful install. You will get two apps SDK manager and AVD Manager. The SDK manager is used to update the SDK and to download the available libraries for different API versions and other libraries as you require. The AVD manager is used to create android-virtual-devices for available API versions. Open AVD manager from program files if you

Small font size in Android emulator

故事扮演 提交于 2019-12-05 18:01:41
Sometimes I notice the Android emulator starts with a very small font size. This seems to happen randomly. Other times it has a normal font size. I use ADT 10.0.1. Do you know what is the problem? This happens very often, and although I'm not sure about the exact reason behind this, it seems that somehow the wrong density was detected for this and resources for a lower dpi is loaded inside a higher dpi emulator. That's why everything is smaller, but the layout works properly and aligns things at their own places. And you're right: when this happens, network doesn't work in emulator! These two

Decoding and matching Chip 8 opcodes in C/C++

▼魔方 西西 提交于 2019-12-05 16:28:42
I'm writing a Chip 8 emulator as an introduction to emulation and I'm kind of lost. Basically, I've read a Chip 8 ROM and stored it in a char array in memory. Then, following a guide, I use the following code to retrieve the opcode at the current program counter (pc): // Fetch opcode opcode = memory[pc] << 8 | memory[pc + 1]; Chip 8 opcodes are 2 bytes each. This is code from a guide which I vaguely understand as adding 8 extra bit spaces to memory[pc] (using << 8) and then merging memory[pc + 1] with it (using |) and storing the result in the opcode variable. Now that I have the opcode

Use an Android emulator image on multiple machines

佐手、 提交于 2019-12-05 16:05:12
I've created a custom build of Android and got it running as an emulator image on the development machine. I need to be able to use that image on another computer running Windows (it was built on the Mac). I've found the image files that the emulator uses (ramdisk.img, userdata.img and system.img) but I'm not sure how to create a new target that I can access from the SDK and AVD manager. Anybody have experience with this? Thanks You should perform the following steps: Create a new AVD in AVD Manager with the version equal to your custor ROM. Go to %userprofile%/.android/avd/your_avd_name.avd

How do I simulate that the emulator has as an SD Card?

一世执手 提交于 2019-12-05 13:30:55
Can I simulate an sdcard presence in the android emulator? Dave Webb This is covered in the Emulator Documentation . The emulated SD Card image is single file which the Emulator reads to and writes from. You can specify to create an SD Card when you create the Android Virtual Device (AVD) using the android GUI (for example from within Eclipse by clicking the button): Or you can create an SD Card using the mksdcard command . To use an SD Card image when you start your emulator pass the -sdcard option to the emulator command: emulator -sdcard c:/path/to/my/sdcard If you're using the android GUI

How to fix INJECT_EVENT permission exception when sending touches to an ActivityInstrumentationTestCase2 test

荒凉一梦 提交于 2019-12-05 13:24:00
Although there are many examples showing that something like this should work, the following code fails. This code lives in a test project that is associated with the real project. public class MyTest extends ActivityInstrumentationTestCase2<MyActivity> { public MyTest(String name) { super("com.mypackage.activities", MyActivity.class); setName(name); } public void testTap() throws Throwable { //Required by MotionEvent.obtain according to JavaDocs long downTime = SystemClock.uptimeMillis(); long eventTime = SystemClock.uptimeMillis(); Instrumentation i = getInstrumentation(); //Setup the info

Eclipse DDMS window not showing any thing +android

旧城冷巷雨未停 提交于 2019-12-05 12:29:08
my Eclipse DDms window not showing anything(empty logcat,empty file explore... etc) while running my app in emulator. Sometime it works if i restart eclipse but not all time. why such type of hanging... androidGuy Even i face the same problem number of times. What i use to do is go to DDMS and click on the emulator name which is displayed in left side of the window under title "Name" in the Devices-view. Now Logcat will begin to display sequence of events. If this doesn't works then reset adb by clicking the down arrow in the left side of the DDMS window under the title "Devices". Hope this