Chip8 | Chip 8 Interpreter / Emulator | Emulator library
kandi X-RAY | Chip8 Summary
kandi X-RAY | Chip8 Summary
Chip 8 Interpreter / Emulator. This is a Java WIP Chip8 Interpreter / Emulator mainly as an educational exercice.
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Top functions reviewed by kandi - BETA
- The main entry point
- Decode and execute the opcode
- Decode and execute the XXF function
- Decode and execute the code block
- Handle key pressed
- Get the position of the key
- Paint the gradient
- Print the memory
- Displays debugging
Chip8 Key Features
Chip8 Examples and Code Snippets
Community Discussions
Trending Discussions on Chip8
QUESTION
I have a bunch of LLVM IR / BC files that, at the moment, I am compiling to native code with LTO using clang:
ANSWER
Answered 2021-Sep-13 at 04:28I have found a relevant feature request ticket in the LLVM-MOS issue tracker. As of 2021-09-13, the answer to this question is in the negative: this is an open problem with no implemented solution.
QUESTION
i have this code to read a chip8 rom and print out the corresponding instructions:
...ANSWER
Answered 2021-Jan-19 at 02:14The "random behavior" is your program using fgets to read into memory pointed to by uint8_t *code.
Ask yourself, "What does code point to?"
Realize that the answer is "I don't know, because I didn't set it to anything."
And THAT is the "random" behavior. Whatever value was in the stack memory or register that the compiler assigned to code is what was being used. It is "random" as in you have no idea what that value is going to be.
QUESTION
I'm new to Rust, I have a file structure like this
main.rs
chip8.rs
chip8_gui.rs
I added a unit test in main.rs and a unit test in chip8.rs (a simple assert_eq!(2,2)) but it only finds the test in main.rs. Why? I am trying to test a private function of chip8.rs.
ANSWER
Answered 2020-Nov-12 at 07:12Turns out TDD is fun, but you have to make sure it compiles! The solution was simply to add mod chip8 in main.rs
QUESTION
I am new to emulation and figured writing a CHIP-8 interpreter would get be started. However, I am facing an issue. When running a game, like Brix for example, it draws the game no problem (the paddle, etc.) but, after it is done, it just gets stuck in a loop of 0x3000 and after that, a jump instruction that jumps back to the 0x3000. It is clear that 0x3000 is false and that is why it is looping, but I can't figure why that is for the life of me.
Screenshot of the game and the Chrome devtools console (the game is Brix, taken from here): https://i.stack.imgur.com/a0wNM.png
In that screenshot, in the console, you can see the 0x3000 is failing and going to a jump, and that jump goes back to 0x3000, and the cycle repeats. This happens with most, if not all games. I suspect is has something to do with the delay timer, since 0x3000 is checking for v0 === 0, but it fails, and goes to the jump instruction.
Here is my main CHIP-8 class:
...ANSWER
Answered 2020-Jul-14 at 16:04It appears that your issue is that you are incrementing the PC again after assigning it in the JMP instruction (0x1nnn) (You can see the discrepancy in your debug output). So after the current executeOpcode cycle, the execution returns to this.step and hits this line:
QUESTION
I am writing a simple chip8 emulator.
I have a value called programCounter(PC).
The problem is that once I return from the Instruction1( which modifies PC), PC returns to the value it was before being modified by the method.
ExampleBefore Instruction1 assigns to PC, the value of PC is 203.
After Instruction1, the value of PC is (0x0NNN & 0xFFFE).
By programCounter++, it return to 203 than increments.
...ANSWER
Answered 2020-Jul-03 at 03:01You have two or more cpp files. Each forms a compilation unit. (A .h you include becomes part of each compilation unit separately; the notion of compilation unit applies after preprocessing is done.)
Static global variables are not linked between compilation units, they're private to the unit they're defined in.
static uint16_t programCounter is thus local to each cpp file.
As a general rule:
- Stop using global variables, especially mutable ones. Pass shared state explicitly. Use a class or struct.
- Especially stop using mutable static variables in header files. That is insane.
- Check the address of data when things don't make sense.
Be aware that static has a different meaning within classes and functions that it does at global scope. Regular globals already have static storage class (same as static variables), but with global cross-file visibility.
QUESTION
I wrote a simple Chip-8 emulator in C (mostly taking inspiration from this; to be honest, just rewriting it in C). It uses SDL 2.0, which I definitely have installed.
As I tried compiling the files (gcc main.c chip8.c -o chip8), I got this stack of errors:
ANSWER
Answered 2020-Feb-03 at 19:49Why doesn't the linker work with this? Are any other compiler flags required?
Yes, you need to tell the linker which libraries to link against, e.g.:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install Chip8
You can use Chip8 like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the Chip8 component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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