Forum Overview :: The Verse Project

Q*bert available now for the MiSTer by Ice Cream Jonsey 02/07/2021, 11:59am PST Q*Bert arcade core for MiSTer FPGA. It's a reproduction of the original PCBs with the following exceptions: I removed D2 to D4 multiplexers because FG POS/ID registers E1-2, E2-3 & E4 are now dual port RAM. I removed D5 to D7 multiplexers because BG character RAM E7 is dual port. I removed D8 to D10 multiplexers because E10-11 buffer RAM is dual port. I removed E8/E9-10 bus isolation because of dual port E7 & E10-11. I removed H13 mux because color RAM G13 to G14 is dual port. Additional details Audio board MA216: SC01 is not implemented. Waiting for brave people to do it. NVRAM: Not implemented - NVRAM should be C5/C6 on schematics. Ports: IP17-10: input port for test buttons, coins and player 1/2. IP47-40: input port for joystick. OP27-20: output port for sound interface OP33-37: output port for knocker and coin meter. Game Compatibility List QBert: 100% compatible. QBert Qubes: 100% compatible, bug on rolling cube screen and dip switches inverted. Curve Ball: dip switch order is weird, no sound. Insector: 100% compatible, dip switch problems, controller inverted & no test mode(?). Mad Planets: 100% compatible but blinking letters. Tyls: 100% compatible - dip switches inverted. ...so to summarize, with the exception of QBert, don't expect another game to work properly. Known Bugs Problem with vertical position register E1-2. When a new object is falling from the top of the screen (ball), it appears briefly at the bottom of the screen. High Scores screen: the big three letters of player's name are not displayed correctly. It works well after a few resets (is it a problem with bus sharing logic which sends zeros to simulate high impedance for ORing outputs?). I don't have the PCB so it's difficult to know the original behavior. Votrax chip is cruelly missing, QBert needs his @!#?@! voice!!!

This is the FPGA Gaming forum. by Ice Cream Jonsey 11/07/2019, 11:05am PST     Platform cheat sheet to load games by Ice Cream Jonsey 11/07/2019, 11:07am PST         Re: Platform cheat sheet to load games by Owlnonymous 01/01/2022, 11:00pm PST             Re: Platform cheat sheet to load games by Ice Cream Jonsey 01/02/2022, 12:42am PST     hode up I'm still workin on it NT by pinback 11/07/2019, 5:06pm PST     Got some arcade cores working. by Ice Cream Jonsey 11/10/2019, 1:05pm PST     Q*bert available now for the MiSTer by Ice Cream Jonsey 02/07/2021, 11:59am PST