AN ALLEGED murderer has pleaded guilty to murdering his wife in front of 300 people, ending his trial in the midst of his own defence evidence.

Just after 4pm, a Supreme Court jury was told that Zialloh Abrahimzadeh, 57, wanted to enter his plea again, having been cross-examined all morning by prosecutors.

He then pleaded guilty to murdering his wife, Zahra, in front of 300 people at the Adelaide Convention Centre in March 2010.

Earlier today he wiped his eyes as he told a Supreme Court jury he loved Zahra "very much".

"We had lived together for twenty-something years and I loved her - if she didn't love me, that was a different matter," he said.

"I loved her very much... at the time we married, I gave her 125 gold coins.

"If she wanted to divorce me I had no problem, provided we sit down and sort out finances first."

Abrahimzadeh previously has admitted stabbing Zahra to death but pleaded not guilty to murder, claiming he was hallucinating when he inflicted eight wounds with a knife hidden in his jacket.

Last week, he told jurors he saw "dark, ugly men" hurting the couple's youngest child, Anita, and believed he was defending her.

Prosecutors have alleged Abrahimzadeh's crime was a "final act of control" prompted by Zahra's decision to divorce him after years of domestic violence.

The couple's daughters have given evidence they were abused as well.

Abrahimzadeh has denied abusing Zahra and claimed he used only "mild force" to discipline the girls.

In cross-examination today, prosecutor Sandi McDonald accused Abrahimzadeh of "despising" his late wife.

She said he hated her for spreading rumours and shaming him, and had fought with her over their house in Iran.

Abrahimzadeh said that was not the case.

"No, I loved her, and all of those other (factors) put a lot of pressure on my mental state," he said.

"I was trying to tell her we should be involved equally in our children's lives, but she was trying to take away Anita and have her 100 per cent of the time."

Justice John Sulan this afternoon discharged the jury and remanded Abrahimzadeh in custody for sentencing.