MCFSIM_ICR_LEVEL6
writeb(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI1, MCFSIM_UART1ICR);
writeb(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI2, MCFSIM_UART2ICR);
writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI3,