mirror of https://github.com/hsoft/collapseos.git
17 lines
466 B
Plaintext
17 lines
466 B
Plaintext
( Place BEGIN, where you want to jump back and AGAIN after
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a relative jump operator. Just like BSET and BWR. )
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: BEGIN, PC ;
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: BSET PC SWAP ! ;
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( same as BSET, but we need to write a placeholder )
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: FJR, PC 0 A, ;
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: IFZ, JNZ, FJR, ;
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: IFNZ, JZ, FJR, ;
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( : IFC, JRNC, FJR, ;
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: IFNC, JRC, FJR, ; )
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: THEN,
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DUP PC ( l l pc )
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-^ 1- ( l off )
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( warning: l is a PC offset, not a mem addr! )
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SWAP ORG @ + BIN( @ - ( off addr )
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C! ;
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