| keybuf equ 0040h:001Eh |
| |
| absolute 5000h |
| label: |
| |
| section .text |
| absval equ 1000h |
| |
| org 0x100 |
| ; Using seg should yield the segment part. |
| mov ax, seg keybuf |
| mov ax, seg (0040h:001Eh) ; NASM doesn't understand this syntax |
| mov es, ax |
| |
| ; Use without seg should yield just the offset part. |
| mov bx, keybuf |
| mov bx, 0040h:001Eh ; Illegal in NASM ("invalid combination...") |
| |
| ; Each of the below pairs should be equivalent (and legal) in Yasm. |
| ; There are some differences from NASM here! |
| |
| ; Direct far jump. |
| jmp keybuf ; Results in a near jump in NASM |
| jmp 0040h:001Eh ; But Yasm sees the equ value as equivalent to this |
| |
| ; Force near (non-far) jump (just offset, no segment). |
| jmp near keybuf |
| jmp near 0040h:001Eh ; Illegal in NASM ("mismatch in operand sizes") |
| |
| ; A couple of jumps to "normal" absolute addresses. |
| jmp 0x1e |
| jmp 0 |
| jmp absval |
| jmp label |
| |
| ; Non-absolute jump |
| label2: |
| jmp label2 |
| |
| ; Non-relative access |
| mov ax, [0] |
| mov ax, [label] |
| |
| ; Direct far, explicitly. |
| jmp far keybuf ; Illegal in NASM ("value referenced by FAR is not relocatable") |
| jmp far 0040h:001Eh ; Illegal in NASM ("mismatch in operand sizes") |
| |
| keybufptr: |
| dw keybuf ; offset part |
| dw seg keybuf ; segment part |
| |
