Cracking (old) games

Good old copy protections

Machine code

Hack it

Amiga graphics

Chunky image format

Bitplanes

5 Bitplanes

Run-length encoding

A (crappy) implementation in rust

https://github.com/m0ppers/rpck

Tooling for Amiga development

• http://aminet.net/package/dev/asm/ira
• http://sun.hasenbraten.de/vasm/
• http://www.winuae.net/ - there are also other UAE variants for all sorts of OSes
• Transparent file system access only available on windows. So that is the platform of choice (for my workflow)

Amiga Joystick

USB HID (Human Interface Device)

• HID Report Descriptor describes the device
• MANY primitives to describe all sorts of devices
• Several device classes (keyboard, mouse, gamepad etc.)
• HID Descriptor allows the Host (your computer) to interpret the raw data being sent by the device

							
								const uint8_t hid_report_descriptor[] = {
	0x05, 0x01, //	USAGE_PAGE (Generic Desktop)
	0x09, 0x05, //	USAGE (Gamepad)
	0xA1, 0x01, //	COLLECTION (Application)
	0xa1, 0x00,  /*     COLLECTION (Physical)          */
	0x05, 0x01,  /*       USAGE_PAGE (Generic Desktop) */
	0x09, 0x30,  /*       USAGE (X)                    */
	0x09, 0x31,  /*       USAGE (Y)                    */
	0x15, 0x81,  /*       LOGICAL_MINIMUM (-127)          */
	0x25, 0x7f,  /*       LOGICAL_MAXIMUM (127)        */
	0x75, 0x08,  /*       REPORT_SIZE (8)              */
	0x95, 0x02,  /*       REPORT_COUNT (2)             */
	0x81, 0x02,  /*       INPUT (Data,Var,Rel)         */
	0xc0,        /*     END_COLLECTION                 */
	0x05, 0x09, //	USAGE_PAGE (Button)
	0x19, 0x01, //	USAGE_MINIMUM (Button 1)
	0x29, 0x02, //	USAGE_MAXIMUM (Button 2)
	0x15, 0x00, //	LOGICAL_MINIMUM (0)
	0x25, 0x01, //	LOGICAL_MAXIMUM (1)
	0x75, 0x01, //	REPORT_SIZE (1)
	0x95, 0x08, //	REPORT_COUNT (8)
	0x81, 0x02, //	INPUT (Data,Var,Abs)
	0xC0,		//	END_COLLECTION
};
							
						

CAN Bus

• Used to exchange messages within vehicles
• ISO Layer 1 and 2
• Modern cars use ethernet
• CAN members will do simple, continous broadcasting
• Implicit priorities using the address

A CAN message

Byte 7 indicates the throttle is at full (00 would be no throttle)

IMU Sensors

What does it do?

• Tons of different sensors available
• Varying features. Some provide completely free 3D movements (expressed in DOF - Degrees of Freedom)
• Originally started with Bosch bnO055 (enterprise grade 9 DOF sensor)
• Ended up using a MPU6050 based solution (6 DOF)

Hardware Tooling

• http://kicad-pcb.org/
• http://fritzing.org/home/