* fixed bug in the intr and msdos functions, introduced in r24462

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24463 3ad0048d-3df7-0310-abae-a5850022a9f2
+ implemented tcg8086.a_op_ref_reg; supports op_add/sub/xor/or/and

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24464 3ad0048d-3df7-0310-abae-a5850022a9f2