Build a reprogrammable cartridge. Many things can be done with such a cartridge: You can develop your own applications or games and try them on real hardware instead of using an emulator. If you`d like to get into genesis development, I think the genesis technical documentation available at zophar is a good starting point. You can listen to genesis music (. gym) on a real genesis.
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There is a rom named Flavio`s GYM Player which needs to have a. GYM file appended to it. Once loaded, the rom plays the gym file. Yes, it`s possible to download real games roms and use them with this cartridge. Unfortunately, it`s illegal. Some people say that if you erase the rom within 24 hours, it`s legal to use them. (I dont know if it`s true, I am not a lawyer). Since many of those games are not sold anymore and have been `abandonned` by the company owning the copyright, they may be considered as abandonware. (And even then, I`m not sure if it`s legal) Here are a few pictures of the second version, which supports games up to 1024K (1Meg) by using 2 AT49F040 512K flash chips. This new version can also hold 2 games of 512K each. Each time the console`s reset switch is pressed, the current game is changed. A jumper selects between the 1x1024K and 2x512K mode. Here`s the second version schematic. I used two AT49F040 512K flash chips. The cartridge can hold a game of 1024K (1Meg) or 2 512K games. When 512K games are used, we can alternate between them by pressing the reset switch on the genesis: The first version which used AT49F002 flash chips did not have the 74ls90 to alternate between banks. The A18 signal was simply not connected since the flash chips addressing stops at A17. To program the flashs, I use an old universal programmer from xeltek. You can buy an universal programmer from ebay for approximately 50$ US....
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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