Dynacube Operating Systems

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Dynacube Operating Systems

• Dynacube for Today and Tomorrow

Guided by Mrs. G. Andal Jayalakshmi, B.E, M.S
Mohammed Hassan Shah J. Meenakshi K.R.
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Problem Description

• The project aims to implement an operating
  system with the following features
• Intel x86 based
• 32 bit Protected mode Multitasking
• Modular Design Approach
• Graphical User Interface (GUI)
• POSIX 1003.1 standard compliancy

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Implementation Details
Languages Used Intel Assembly C without
using Standard libraries C - for GUI
components Platform Used GNU/Linux Tools
Used GCC, G Compiler NASM Assembler VMware,
Bochs Emulator Kdevelop IDE
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Description of Modules
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Kernel Module
100 Completed

• Kernel Initialization
• Process Manager
• Memory Manager

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Kernel Initialization
100 Completed

• Enabling A20 line
• Loading Global Descriptor Table
• Loading Interrupt Descriptor Table
• Remapping the Programmable Interrupt Controller
• Initializing the PCB, PGDE, PGTE and Virtual8086
  Monitor
• Initializing the Timer, keyboard, mouse and
  floppy drivers
• Initializing the SVGA mode 114 (resolution 800 x
  600 colors 64000)
• Enabling the Timer, Keyboard, Mouse and Floppy
  IRQ
• Enabling Interrupts

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Process Manager
100 Completed

• Task State Segment based Multitasking
• Queues used Ready, message, device, gui_server.
• Asynchronous Message Passing Interface
• Scheduling policy Priority based Round Robin
• Dynamic process creation loading binary image,
  LDT and page table initialization

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Memory Manager
100 Completed

• Segmented paged memory model
• Dynamic memory allocation and de-allocation
• Page level first- fit algorithm
• Variable chunk level
• Logical to linear and linear to physical mapping
• Physical memory copying

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Device Manager Module
100 Completed
Keyboard and SVGA Video Driver

• Mode Info Retrieval and Setting (114)
• Linear Frame Buffer and Double Buffering
• Font Map and Cursor Creation
• Primitive Graphical Library Functions

Mouse Driver

• Initializing, Calibration, Reset handling
• Interrupt Handling
• Cursor Tracking
• Event Detection

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Device Manager Module
100 Completed
Floppy Device Driver

• Floppy process creation and Request Handling
• Floppy IRQ Handling
• DMA Initialization and Transfer
• Motor Handling
• Seeking and Recalibration
• Read And Write Sector

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File System Module
100 Completed

• FAT12 with Long Name Standard
• File and Directory Management creation,
  removal, retrieval
• Descriptor Handling
• File Buffering

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DServer (GUI) Module
100 Completed

• GUI process and Message Handling
• Window Management
• Alias Id Mapping
• Z-order Processing
• Menu Handling
• Component Management

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System Calls Implemented
Process Manager
Floppy Driver
fork exit send receive
read_sector write_sector
File System
open read write create remove rename
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System Calls Continued
Graphics Library
GUI
setPixel getPixel getImage putImage
drawLine drawRect drawCircle
create show hide destroy resize enable disable
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Test Applications

• Dynaplorer (Explorer)
• Dynapad (Text Editor)
• Dynacalc (Calculator)

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Screen Shots
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Dynaplorer
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Dynapad
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Dynacalc
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Bibliography

• Design Literature
• Andrew S. Tanenbaum and Albert S. Woodhull,
  Operating Systems Design and Implementation
• Microsofts official FAT12 documentation
• Hardware Literature
• IA-32 Intel Architecture Software Developers
  Manual
• Volume 1 Basic Architecture
• Volume 2 Instruction Set Reference
• Volume 3 System Programming guide
• VESA BIOS EXTENSION (VBE) Core Functions
  Standard Version 3.0
• NEC µPD765 and Intel 82072-7 Floppy Disk
  Controller specification
• Adam Chapweske, PS/2 Keyboard and Mouse
  Interface

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Conclusion

• The project has successfully achieved its stated
  goals. We are looking forward to make the
  following enhancements to our project in near
  future
• Extend Dynacube to 64bit architectures.
• To provide SMP support.
• To port GCC and G to our Dynacube operating
  system.
• To include File System support for EXT2, EXT3
  and NTFS formats.
• To provide Unicode support.
• To provide more sophisticated user interfaces.
• To design a configurable Window manager.

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Queries
Queries ???
?
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Thank you