King of Dirt
n00b
- Joined
- Mar 28, 2020
- Posts
- 20
Well, after getting my AES up and running, I moved on to an MVS board I've had sitting around. I've been taking the necessary steps to consolize it and get it ready to go. Everything has been fine until I installed the UniBIOS this afternoon. It's a Chinese variant of the MV-1A board, the MV-1ACHX, but everything I've seen about the MV-1A board has been relevant to this revision. I'm assuming it's just a regional code.
Since (presumably) there won't be any future UniBIOS updates, I opted to piggyback the socket instead of a full removal and socket install. Everything went smoothly: clipped and lifted leg 2 of BIOS chip and socket, soldered the remaining 39 legs together in the stack, ran a 15K resistor from BIOS leg 2 to pin stack 40, and ran a wire from socket pin 2 to pin stack 20. Socketed the UniBIOS, and went through and checked for continuity from each pin of the UniBIOS down to the original BIOS pin going into the board. All is good.
But when I power on the MVS I get the garbled screen that says SOMETHING IS WRONG. Is this the wrong install method for this board, the MV-1A? I know the MV-1C is a different install, with a surface mount BIOS chip and an install that isn't 1 to 1 with the BIOS pins. Can the UniBIOS not be installed on an MVS board with this piggyback method? I'm at a bit of a loss here, everything looks good but the UniBIOS isn't working. Any input would be really appreciated!
Install pic 1
Install pic 2
Since (presumably) there won't be any future UniBIOS updates, I opted to piggyback the socket instead of a full removal and socket install. Everything went smoothly: clipped and lifted leg 2 of BIOS chip and socket, soldered the remaining 39 legs together in the stack, ran a 15K resistor from BIOS leg 2 to pin stack 40, and ran a wire from socket pin 2 to pin stack 20. Socketed the UniBIOS, and went through and checked for continuity from each pin of the UniBIOS down to the original BIOS pin going into the board. All is good.
But when I power on the MVS I get the garbled screen that says SOMETHING IS WRONG. Is this the wrong install method for this board, the MV-1A? I know the MV-1C is a different install, with a surface mount BIOS chip and an install that isn't 1 to 1 with the BIOS pins. Can the UniBIOS not be installed on an MVS board with this piggyback method? I'm at a bit of a loss here, everything looks good but the UniBIOS isn't working. Any input would be really appreciated!
Install pic 1
Install pic 2