mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-27 03:38:08 +11:00
b21be43535
Also, move doc to doc/asm.txt. Also, fix the pcat recipe which was broken since the overlay change. I hadn't noticed it because I didn't have to rebuild the MBR.
17 lines
460 B
Plaintext
17 lines
460 B
Plaintext
( Place BEGIN, where you want to jump back and AGAIN after
|
|
a relative jump operator. Just like BSET and BWR. )
|
|
: BEGIN, PC ;
|
|
: BSET PC SWAP ! ;
|
|
( same as BSET, but we need to write a placeholder )
|
|
: FJR, PC 0 A, ;
|
|
: IFZ, JNZ, FJR, ;
|
|
: IFNZ, JZ, FJR, ;
|
|
: IFC, JNC, FJR, ;
|
|
: IFNC, JC, FJR, ;
|
|
: THEN,
|
|
DUP PC ( l l pc )
|
|
-^ 1- ( l off )
|
|
( warning: l is a PC offset, not a mem addr! )
|
|
SWAP ORG @ + BIN( @ - ( off addr )
|
|
C! ;
|