Thease arae small but powerful programs which will allow the use to do low level activity on the system. The fully functional code on not listed here. What follows are the code snippets I used to write before writing a fully functional module. They were written for a DOS16 based system, hence, you have to run these programs in pure DOS mode. To go to pure DOS mode you restart your system, and press F8 to go to Windows startup menu, then select Command Line Only option. Now you can run thses programs if you have compiled them already. You can compile them in using Borland C++ 3.0 and above, but all of them might not run under Windows because some of them use INT 21h which is not present in the DOS emulation which Windows provides(the VDM-Virtual Dos Machine). Expertise in in C,Assembly and Pointers will greatly aid to understand programs better. Each program has a comment line AIM : which tell what program is roughly intended to do. I will write a short description of each code along with the code sometime later.

1. X86READ.cpp
2. DD3SEC.cpp
3. FUNCPTR.cpp
4. MYSHELL.cpp
5. RMFILE1.cpp
6. DDTSR1.cpp
7. NOBOOT.cpp
8. RMFILE2.cpp
9. BAS.cpp
10. DDTSR.cpp
11. GETSCAN.cpp
12. NODEL.cpp
13. ROMBASIC.cpp
14. BOOTIT.cpp
15. DISPOPEN.cpp
16. HDPROT.cpp
17. PACKAKEY.cpp
18. SAVER.cpp
19. BOOTSTRP.cpp
20. DISPOP.cpp
21. INT18TES.cpp
22. POST.cpp
23. TSRCLOCK.cpp
24. CAPSALL.cpp
25. DISP.cpp
26. INT19TES.cpp
27. PRINTCAP.cpp
28. T.cpp
29. CAPSON.cpp
30. DOSDEL1.cpp
31. INT.cpp
32. PRINTCHR.cpp
33. VIDEO.cpp
34. CHANGATTR.cpp
35. DOSDEL2.cpp
36. KEYTWICE.cpp
37. PTRS.cpp
38. CHECKMEM.cpp
39. DOSDEL.cpp
40. MEMSIZE1.cpp
41. PUTCUR.cpp
42. CHECKXMS.cpp
43. DOSMD.cpp
44. MEMSIZE.cpp
45. PUTC.cpp
46. CHANGATTR.cpp
47. DOSVER.cpp
48. MYCMD.cpp
49. PUTFULLA.cpp
50. COLO3SEC.cpp
51. FINDRIVE.cpp
52. MYSAVER.cpp
53. PUTROCOL.cpp