If I have a particular interrupt disabled in the IER, will it still set the appropriate flag in the interrupt flag register?

Basically, I want the 6502 to be able to get the status of a handshake line (I want to know when the peripheral device signals DATA TAKEN). I don't want the 6502 to be interrupted for this. I just want to read the flag register.

This seems like it would be a common requirement. I'm not able to try this at the moment (I'm away from the hardware). Just curious if that's how it works.

Section 2.3:

When the Data Ready signal is received, it sets an internal flag in the Interrupt Flag Register (IFR). This flag may interrupt the microprocessor or it may be polled under program control.

This indicates to me that, in general, the IFR operates independently of the IER, and the latter simply acts as a mask between the IFR and the /IRQ output.

I missed that line. Seems to perfectly describe what I need. Thanks!

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?