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collapseos/blk/034
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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: OPr0 ( reg op ) CREATE C, C, DOES>
C@+ A, C@ <<3 OR 0xc0 OR A, ;
0 0xd0 OPr0 ROLr1, 0 0xd1 OPr0 ROLx1, 4 0xf6 OPr0 MULr,
1 0xd0 OPr0 RORr1, 1 0xd1 OPr0 RORx1, 4 0xf7 OPr0 MULx,
4 0xd0 OPr0 SHLr1, 4 0xd1 OPr0 SHLx1, 6 0xf6 OPr0 DIVr,
5 0xd0 OPr0 SHRr1, 5 0xd1 OPr0 SHRx1, 6 0xf7 OPr0 DIVx,
0 0xd2 OPr0 ROLrCL, 0 0xd3 OPr0 ROLxCL, 1 0xfe OPr0 DECr,
1 0xd2 OPr0 RORrCL, 1 0xd3 OPr0 RORxCL, 0 0xfe OPr0 INCr,
4 0xd2 OPr0 SHLrCL, 4 0xd3 OPr0 SHLxCL,
5 0xd2 OPr0 SHRrCL, 5 0xd3 OPr0 SHRxCL,