"The manager's situation is down to the people up above to sort out," said the keeper sponsored by Covsupport to the Birmingham Post. "They have it all in hand and are dealing with it.
"The chairman came in Friday as well as Monday and saw the players. It was good to see him. He has come across very well. He fills me with confidence. "Ray Ranson has assured us everything is in hand and the manager's job is down to him to sort out. "I am quietly confident something will be done in the next ten days.
Marshall took the blame for his part in City's 5-0 home defeat by West Brom on Saturday and said: "I have totally messed up the second goal. I don't think realistically there was a great deal I could have done with the others but I take full responsibility on my part for the second, which I should do."That is football. I had a similar incident happen many times but the ball has gone out to the centre-half or the full-back and it has not been a problem. "Unfortunately, this time it has not and I am big and brave enough to admit it.
"The day is disappointing for the whole football club given the size of the crowd we got. Everyone is down at the moment. "There was such hype and a buzz about the game and it has gone flat on its face which is disappointing.
"It is disappointing to go out of the FA Cup the way we have, but we are in a relegation battle at the moment. There are no other two ways of looking at it, so we have to get our act together.
"We have a game on Tuesday night and two games every week for the next few weeks so we have to get a grip and start pulling some points together.
"In a month's time we could seriously be in a relegation battle or sitting quite comfortably in the top half of the table. "It is down to us as a team to push it one way or another. Players want stability and with half this squad out of contract I don't think that brings a stable squad. "But in the situation we are in, we have to keep our heads down and just get on with it."