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f6ded7712e
This is the first commit I do entirely in VE. It's a habit I'm planning on taking as it helps a lot to find usability issues.
17 lines
547 B
Plaintext
17 lines
547 B
Plaintext
( a -- k7, absolute addr a, relative to PC in a k7 addr )
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: _r3fc DUP 0x3f > IF _oor THEN ;
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: _raddr7
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PC - DUP 0< IF 0x40 + _r3fc 0x40 OR ELSE _r3fc THEN ;
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: _brbx ( a b op -- a ) OR SWAP _raddr7 3 LSHIFT OR ;
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: BRBC 0xf400 _brbx ; : BRBS 0xf000 _brbx ; : BRCC 0 BRBC ;
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: BRCS 0 BRBS ; : BREQ 1 BRBS ; : BRNE 1 BRBC ; : BRGE 4 BRBC ;
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: BRHC 5 BRBC ; : BRHS 5 BRBS ; : BRID 7 BRBC ; : BRIE 7 BRBS ;
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: BRLO BRCS ; : BRLT 4 BRBS ; : BRMI 2 BRBS ; : BRPL 2 BRBC ;
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: BRSH BRCC ; : BRTC 6 BRBC ; : BRTS 6 BRBS ; : BRVC 3 BRBC ;
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: BRVS 3 BRBS ;
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