MS-DOS also provides Interrupt 21h functions for such system-management tasks as setting and examining the system time and date, the state of the Verify flag, and the state of the CTRL+C check flag. The Verify and CTRL+C check flags control how MS-DOS responds to input from programs and users.
Following are the MS-DOS system-management functions:
Function | Description | Version |
25h | Set Interrupt Vector | 1.0 |
2Ah | Get Date | 1.0 |
2Bh | Set Date | 1.0 |
2Ch | Get Time | 1.0 |
2Dh | Set Time | 1.0 |
2Eh | Set/Reset Verify Flag | 1.0 |
30h | Get Version Number | 2.0 |
3300h | Get CTRL+C Check Flag | 2.0 |
3301h | Set CTRL+C Check Flag | 2.0 |
3306h | Get MS-DOS Version | 5.0 |
35h | Get Interrupt Vector | 2.0 |
54h | Get Verify State | 2.0 |