DSPHLE MailHandler: Synchronize reads and interrupts This change is meant to solve the following problem: how to translate the following snippet to DSPHLE: SendInterruptAndWaitRead(MAIL_A); SendAndWaitRead(MAIL_B); SendInterruptAndWaitRead(MAIL_C); This should cause the following actions on the CPU side: ---> Woken up by interrupt Reads MAIL_A Reads MAIL_B <--- Exits interrupt handler ---> Woken up by interrupt Reads MAIL_C <--- But with the current D