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collapseos/blk/040
Virgil Dupras b21be43535 Move 8086 assembler from B730 to B30
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.
2020-09-21 19:24:54 -04:00

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: MOVri, SWAP 0xb0 OR A, A, ;
: MOVxI, SWAP 0xb8 OR A, A,, ;
: MOVsx, 0x8e A, SWAP <<3 OR 0xc0 OR A, ;
: MOVrm, 0x8a A, SWAP <<3 0x6 OR A, A,, ;
: MOVxm, 0x8b A, SWAP <<3 0x6 OR A, A,, ;
: MOVmr, 0x88 A, <<3 0x6 OR A, A,, ;
: MOVmx, 0x89 A, <<3 0x6 OR A, A,, ;
: PUSHs, <<3 0x06 OR A, ; : POPs, <<3 0x07 OR A, ;
: SUBxi, 0x83 A, SWAP 0xe8 OR A, A, ;
: ADDxi, 0x83 A, SWAP 0xc0 OR A, A, ;
: JMPr, 0xff A, 7 AND 0xe0 OR A, ;
: JMPf, ( seg off ) 0xea A, SPLITB A, A, A,, ;