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6bc1738bfd
8086 asm is a lot terser than z80... Those indirect memory operations are very handy.
17 lines
642 B
Plaintext
17 lines
642 B
Plaintext
( BOOT DICT: There are only 3 words in the boot dict, but
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these words' offset need to be stable, so they're part of
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the "stable ABI" )
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'E' A, 'X' A, 'I' A, 'T' A, 0 A,, ( prev ) 4 A, ( len )
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H@ XCURRENT ! ( set current tip of dict, 0x42 )
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0 A, ( native )
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DX [BP] 0 MOVx[]+, BP DECx, BP DECx, ( popRS )
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;CODE NOP,
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CODE (br) ( 0x53 ) L2 BSET ( used in br? )
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DI DX MOVxx, DI [DI] MOVx[], DX DI ADDxx,
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;CODE NOP, NOP,
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CODE (br?) ( 0x67 )
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AX POPx, AX AX ORxx, JZ, L2 @ RPCs, ( False, branch )
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( True, skip next 2 bytes and don't branch )
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L1 BSET ( loop will jump here ) DX INCx, DX INCx,
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;CODE NOP, NOP, NOP, NOP, NOP,
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