NTDIOS (Network Disk Operating System), Disk and network operating system. Like Windows, Linux, BeOs, MsDos, its purpose was to manage and process the fundamental functions of a microcomputer. NTDIOS was an operating system for AT Compatible under X86 compatible microprocessor. It was fully developed in assembler and compiled with NASM / TASM. When the kernel is finished, it hope to progress towards a port to C / C ++ and the like.
What NTDIOS is doing today is little. NTDIOS is more or less at the stage of an MSDOS (apparently) not too finished but in 32 bit mode. This is why they are only in the ALPHA phase of the project.
The bootstrap is located on the 1st sector of the boot disk and is responsible for launching the primary kernel of NTDIOS. It contains information about the structure of the drive and the settings for encryption and locking the drive. Anti-virus Boot-Checksum technique.
2. Protected Mode Kernel
Management of LDT tables GDT IDT TSS ect... Switching from real mode to protected mode and vice versa. Management of general protection errors, stack overflow, etc.
3. Multitasking Kernel
Management of tasks, task-gates, time clock, CPU time, ...
4. CPU and multiprocessor identification
Identifies X86 compatible processors: from 8086 to 6x86 (pentium II) Xeon. Intel: "GenuineIntel" AMD: "AuthenticAMD" Cyrix: "CyrixInstead" NexGen: "NexGenDriven" UMC: "UMC UMC UMC" Cache management, pipeline. Multi CPU architecture detection.
5. Keyboard driver
Management of scancodes, ascii tables, special combinations (ctrl-alt-sup).
6. Text mode graphics card driver
Management of the CRT controller, screen frequency, cursor, ...
7. Driver controller floppy
Management of the NEC PD765 controller, collaboration with the DMA controller.
8. Serial port driver
RS232 protocol, Microsoft compatible serial mouse, ...
9. Parallel port driver
Black and white text mode printer.
10. Speaker driver
11. Internal clock timer driver
Date, Time, Stopwatch,...
1. FAT file system
Management of Microsoft's FAT file system (MSDOS). Soon the VFAT and FAT32.
2. VGA / SVGA graphics mode
Management of bit plans, bank switches for (Tseng; Trident; Video7; Paradise; AcuMos; Chips & Tech; ATI; Everex; Ahead; Oak; genoa; ncr; compaq)
3. Modem driver
AT&T modem; Compatible on serial port.
4. Remote machine connection
Connection via RTC modem, BBS, internet.
5. Task manager
Timestamp and management of subtasks (tread / process).
6. NTDIOS Shell
NTDIOS Shell Script, command line interpreter.
7. 32-bit virtual bios
Bios reconstruction in protected mode, plug & play bios management, VESA function, ...
8. Memory pagination
Management of 4 GB of RAM, and 64 TB of virtual memory!
9. Multi-user management
Root, guest, ect...