mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-05 21:40:56 +11:00
15 lines
586 B
Plaintext
15 lines
586 B
Plaintext
|
For backward labels, set happens before write. For forward
|
||
|
|
labels, write happen before set. The write operation writes a
|
||
|
|
dummy placeholder, and then the set operation writes the offset
|
||
|
|
at that placeholder's address.
|
||
|
|
|
||
|
|
Variable actions are expected to be called with labels in
|
||
|
|
front of them. Example, "L2 FSET"
|
||
|
|
|
||
|
|
About that "1 -": z80 relative jumps record "e-2", that is,
|
||
|
|
the offset that *counts the 2 bytes of the jump itself*.
|
||
|
|
Because we set the label *after* the jump OP1 itself, that's 1
|
||
|
|
byte that is taken care of. We still need to adjust by another
|
||
|
|
byte before writing the offset.
|
||
|
|
|