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0f2d14ad8a
This allows us to remove a lot of labels usage in boot code. This commit has no effect on forth.bin.
17 lines
464 B
Plaintext
17 lines
464 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, JRNZ, FJR, ;
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: IFNZ, JRZ, 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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