define does not work well for addresses over $ff

[iznax]

This code looks reasonable.

define Screen $200

LDY #$21
LDA #1
STA Screen,Y ; this works

LDA #<Screen
STA $2
LDA #>Screen
STA $3
LDA #4
STA ($2),Y ; this does not work

but the #> and #< both always appear to generate #0 constants

If you define the label as a memory address it does work, but this really should be equivalent.

*= $200
Screen:

this was the standard behavior of the EQU directive in most assemblers

[BigEd]

Yes, it does look like checkImmediate is wrong.

easy6502/simulator/assembler.js

Line 2177 in df2b895

// Check if param is immediate and push value