The grand jury report did not say whether the boys ever told anyone else about the assaults before testifying.
Asked what he told Sandusky during the arraignment, Amendola said he warned his client to be prepared for things to get worse.
"Jerry's scratching his head saying 'What's next?'" Amendola said. "I said, 'Don't ask that question. Don't ask, 'Can it get worse?' because it can.' We just have to be prepared for whatever else comes down the road. And we will be."
Asked how Sandusky is dealing with the accusations, Amendola said, "How would you take it if you were facing the kind of charges he was facing and your life's work was helping kids? You would be devastated."
Sandusky, who at one time thought he would succeed Paterno as Penn State's head coach, retired from the team after the 1999 season.
Lawyers Andrew Shubin and Justine Andronici, who say they have been representing and advising alleged victims, said the additional charges were to be expected.
"Through our investigation, we have found that Jerry Sandusky is a serial predator who has victimized many people over the course of decades," Androncini said. "Victims, many of whom have kept silent about Jerry Sandusky's abuse for years, are now gaining the strength to come forward and speak about what has happened to them."
Amendola said he believes that Sandusky will be able to post bail. If he does, Sandusky will have to wear an electronic monitor, which Amendola said would be the equivalent to house arrest.
Sandusky also was to have no contact with alleged victims or witnesses in the case and have no unsupervised contact with minors.
Prosecutors had sought $1 million in bail.
The bail and conditions ordered Wednesday by Senior Magisterial District Judge Robert E. Scott were in contrast to the $100,000 unsecured bail Sandusky was granted last month.
The new charges include four counts of involuntary deviate sexual intercourse and two counts of unlawful contact with a minor, all of them first-degree felonies punishable by up to 20 years in prison and $25,000 in fines. Sandusky also was charged Wednesday with three third-degree felony counts and three first-degree misdemeanor counts.
A preliminary hearing on the latest charges was scheduled for Tuesday, the same day as a hearing on the previous charges.
AP reporter Maryclaire Dale contributed to this report from Philadelphia. Levy reported from Harrisburg.
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