hrydgard

Tips and tricks when implementing a PS2 emulator

For console output, just log characters written to KPUTCHAR: 1000F180h

On the IOP, you can, at least initially, ignore load delay slots (but of course not branch delay slots). Also the EE doesn't have load delay slots.

You can start with either EE or IOP but you'll need both fairly soon. EE is more interesting but you have to do the IOP too. If you have a PSX emulator, that's a big boost, just grab its core, and add the things it's missing.

The BIOS, during bootup, will write to or read from all kinds of wacky addresses outside the documented registers. These can generally be ignored.

hrydgard

// .h file

// Similar to strncpy but with safe zero-termination behavior
// and doesn't fill extra space with zeroes.
// Returns true if the string fit without truncation.
// Always performs the copy though.
bool truncate_cpy(char *dest, size_t destSize, const char *src);

template<size_t Count>
inline bool truncate_cpy(char(&out)[Count], const char *src) {

hrydgard

#include <iostream>

uint32_t bit_cast(float f) {
	uint32_t x;
	memcpy(&x, &f, 4);
	return x;
}

float bit_cast(uint32_t x) {
	float f;

hrydgard

// Simple Arduino timing game.
// Made for Nano but probably works on Uno too.
// by Henrik Rydgård
//    [email protected]
//
// Connect:
// * a 0.96" no-name I2C OLED screen to pins SDA=A4,SCL=A5
// * a button to pin 4 and ground (we use internal pullup to avoid adding a resistor)
// * a 8-LED RGB strip to pin 2
// and that's pretty much it.

hrydgard

// Minimal audio streaming using OpenSL.
//
// Loosely based on the Android NDK sample code.
// Hardcoded to 44.1kHz stereo 16-bit audio, because as far as I'm concerned,
// that's the only format that makes any sense.

#include <assert.h>
#include <string.h>

// for native audio