68300

Hello all,

I am writing a serial driver for the QSM SCI.

My question is in regards to the interrupt handling.

There does not seem to be a separate ISR.
How do I clear the interrupts?

There are 2 flags I need to use, TDRE and TC.

The book says that the flags are cleared by:
1. reading SCSR (OK, I do that)
2. Writing to TDR (I don't always want to do this)

So, how do I acknowledge the interrupt without transmitting something?

Can I write $0000 to SCSR?

Thanks

John