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Title: Donkey Kong issue Post by: Tate10 on February 11, 2014, 10:43:03 pm Wondering if anyone has any ideas about my Donkey Kong problem. The game works perfect until I get to the first pie board and then the screen scrambles when I get up to the fire. Never had this problem before and I just did a cap kit on my monitor. This happened three times in a row at about the same spot on the pie board. I have an original 2 board pcb. Any help would be great. Thanks guys. Oh yeah this is my first post!
Title: Re: Donkey Kong issue Post by: arcadefan1985 on February 11, 2014, 10:59:29 pm Might try re-seating everything and hope that works. Sounds like a corrupt rom.
Title: Re: Donkey Kong issue Post by: arcadefan1985 on February 11, 2014, 11:07:28 pm This might help
Function Chip Type 2-Board location 4-Board location Color Maps 256x4 prom 2E (CPU) 2K (CPU) Color Maps 256x4 prom 2F (CPU) 2J (CPU) Character Colors 256x4 prom 2N (VIDEO) 5F (VIDEO) Fixed Characters 2716 3N (VIDEO) 5H (VIDEO) Fixed Characters 2716 3P (VIDEO) 5K (VIDEO) Code 0x3000-0x3fff 2532 5A (CPU) 5K (CPU) Code 0x2000-0x2fff 2532 5B (CPU) 5H (CPU) Code 0x1000-0x1fff 2532 5C (CPU) 5G (CPU) Code 0x0000-0x0fff 2532 5E (CPU) 5F (CPU) Not used - vacant 5L (CPU) Moving Objects 2716 7C (VIDEO) 4M (CLK) Moving Objects 2716 7D (VIDEO) 4N (CLK) Moving Objects 2716 7E (VIDEO) 4R (CLK) Moving Objects 2716 7F (VIDEO) 4S (CLK) Digital Sound 2716 3F (CPU) 3J (SOU) Digital Sound 2716 3H (CPU) 3I (SOU) Z80 CPU Z80 7C (CPU) 5C (CPU) 8035 MPU (music) 8035 7H (CPU) 3H (SOU) CPU RAM 2114 3A (CPU) XX (CPU) CPU RAM 2114 4A (CPU) XX (CPU) CPU RAM 2114 3B (CPU) XX (CPU) CPU RAM 2114 4B (CPU) XX (CPU) CPU RAM 2114 3C (CPU) XX (CPU) CPU RAM 2114 4C (CPU) XX (CPU) Character RAM 2114 2P (VIDEO) XX (VIDEO) Character RAM 2114 2R (VIDEO) XX (VIDEO) Object RAM 2148 6P (VIDEO) XX (VIDEO) Object RAM 2148 6R (VIDEO) XX (VIDEO) Title: Re: Donkey Kong issue Post by: Tate10 on February 12, 2014, 12:25:53 pm I played a quick game this morning without a problem. Last night the game was on for a couple hours before I even played. Maybe I have a ROM that is getting hot and going bad?
Title: Re: Donkey Kong issue Post by: John's Arcade on February 12, 2014, 01:10:14 pm I played a quick game this morning without a problem. Last night the game was on for a couple hours before I even played. Maybe I have a ROM that is getting hot and going bad? Could be anything. bad sockets, bad voltages, heat, etc. Do the simple things first... reseat eproms, check voltages, etc. Title: Re: Donkey Kong issue Post by: STEVESPEEZE on February 16, 2014, 07:41:07 pm I played a quick game this morning without a problem. Last night the game was on for a couple hours before I even played. Maybe I have a ROM that is getting hot and going bad? What he said... a rom. |