JOTEGO

I read this week that on a certain CPS0 game it was possible to select the start level if the test mode DIP switch was set after the game had started. The level was selected by using the price DIP switches. So far, I had always set these switches to 1 credit 1 coin. I went back to the core files and

I am releasing the Bionic Commando core only slightly improved over the beta. The scroll related glitches are almost gone but there is still no sound. Actually, I am precisely releasing it because there is no sound. In computer simulations of the core I do get sound. The attached file is the output

Bionic Commando and CPS1 systems feature brightness control. Let's see how that works. Most arcade games have four bits for each colour component: red, green and blue. These four bits are each a digital signal which can be either 5 Volt or 0 Volt. Arcade boards connect resistors to these signals to

As you know, sound is a repetition phenomenon. Each note is a complex waveform repeating at a given frequency. And the music itself advances at a fixed pace. In all the CAPCOM cores released so far, the sound frequency source was closely related to the rest of the system: a pixel clock was the basis