�@���Ђ��p�Z���f�[�^�Z���^�[�ɓ]�p�����͍̂��ꌧ���C���ɑ���2���ڂŁA�V�x�{�݂̊��p��4���ځB�������p�Z�Ȃǎg���������܂��Ă��炸�A�]�p�ɂ����Č��ݔ����H�����}�������錚���̊��p�����������Ƃ����B
FT Digital Edition: our digitised print edition
。业内人士推荐一键获取谷歌浏览器下载作为进阶阅读
Adam Levy investigates why researchers are sometimes reluctant to disclose their plans to colleagues.
Real-mode programs freely execute CLI and STI to control interrupts, PUSHF and POPF to manipulate flags, INT n for DOS and BIOS calls, and IN/OUT for hardware I/O. In normal protected mode, these instructions are privilege-checked -- they execute normally if the caller has sufficient privilege, and fault otherwise. The 386 can't simply let V86 tasks execute them freely -- a DOS program disabling interrupts would bring down the whole system -- but trapping on every INT 21h call would make V86 impractically slow.