Piscisos by tishion

About PiscisOS

PiscisOS is a tiny operation system based x86 architecture. This system is developed with assembly language(every piece of the code). Features of PiscisOS:

Run in x86 protect model
Multi-task supported (Maximum 250 processes)
Ram Disk file system (FAT12)
System calls
Application supported

PiscisOS is a very simple system, I write it just for learning some knowledge about x86 protect model. You know the file system used by PiscisOS is very very old. But this is not the key point, if you are interested in this project, you can replace the filesystem with whatever you want. :)

Build PiscisOS

For one step building & burning image files, you can clone the repository and just run the build.bat.

F:\Private Proj\PiscisOS>build.bat
====== Building bootsector... ======
flat assembler  version 1.71.51  (1048576 kilobytes memory)
3 passes, 512 bytes.

====== Building pkernel... ======
flat assembler  version 1.71.51  (1048576 kilobytes memory)
4 passes, 28980 bytes.

====== Building shell... ======
flat assembler  version 1.71.51  (1048576 kilobytes memory)
3 passes, 2759 bytes.

====== Building applications... ======
+Building F:\Private Proj\PiscisOS\src\apps\date\date.asm
flat assembler  version 1.71.51  (1048576 kilobytes memory)
2 passes, 408 bytes.
+Building F:\Private Proj\PiscisOS\src\apps\debug\debug.asm
flat assembler  version 1.71.51  (1048576 kilobytes memory)
2 passes, 309 bytes.
+Building F:\Private Proj\PiscisOS\src\apps\echo\echo.asm
flat assembler  version 1.71.51  (1048576 kilobytes memory)
2 passes, 303 bytes.
+Building F:\Private Proj\PiscisOS\src\apps\hello\hello.asm
flat assembler  version 1.71.51  (1048576 kilobytes memory)
2 passes, 317 bytes.
+Building F:\Private Proj\PiscisOS\src\apps\ls\ls.asm
flat assembler  version 1.71.51  (1048576 kilobytes memory)
3 passes, 11083 bytes.
+Building F:\Private Proj\PiscisOS\src\apps\time\time.asm
flat assembler  version 1.71.51  (1048576 kilobytes memory)
2 passes, 404 bytes.

====== Burning OS image... ======
+Creating image file with bootsector...
+Copying perkenel.bin to image file system...
+Copying shell to image file system...
+Create bin folder in image file system...
+Copying all applications to image file system...
Build and burn done successfully!
Output floppy image file: F:\Private Proj\PiscisOS\image\piscisos.img

Now you have got the image file and you can load it with virtual machine.