[Coco] Direct page register question

[Salvador Garcia]

 I want to understand this fully.

LDA $85

When will this be assembled as direct page and when as extended addressing?

I understand the use of SETDP and the less than symbol (<), 

Why is the following assembled as extended?

    LDA  #$40
    TFR  A, DP

    SETDP $40
     LDA $85

Would this be assembled as direct page?

    LDA  #$22
    TFR  A, DP

    LDA $85

Thanks! Salvador


    On Tuesday, October 30, 2018, 2:50:54 PM CDT, William Astle <lost at l-w.ca> wrote:  
 
 <snip>

Since Dave didn't mention it explicitly and it might surprise some 
people, I should mention here that if you do use SETDP to something 
other than 0, then "LDA $85" will assemble as extended addressing.

So if you do "SETDP $40", then "LDA $4085" would assemble as direct 
addressing but "LDA $85" would assemble as extended.


<snip>