Imported PSOS v1.0

README.md

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+#PSOS (Pretty Simple/Stupid Operating System)
+##Version 1.0
+
+####Description:
+
+PSOS is a (very) basic x86 16-bit operating system written in assembly.
+Currently all PSOS is, is a simple command line with 4 commands: CIRCLE, CLEAR, HELP, and VGATEST.
+
+- CIRCLE demonstrates VGA mode 13h by drawing a circle.
+- CLEAR clears the screen.
+- HELP displays a help message.
+- VGATEST displays the possible colors in VGA mode 13h.
+
+Note that these commands are in all-caps.
+This is because PSOS's keyboard driver does not currently support lowercase.
+The only other feature is text scrolling.
+If text reaches the bottom of the screen, it is scrolled up.
+This is still very buggy.
+
+Here is what I hope to accomplish in the next version:
+
+- Port PSOS to C
+- Implement exception handling
+- Add more commands
+- Implement filesystem
+- Implement VESA driver
+
+####Compiling:
+
+Compilation Requirements:
+
+- Basic Nix* setup, or sad Windows imitation ([MinGW](http://mingw.org/), [Cygwin](https://cygwin.com/), [Bash for Windows](https://msdn.microsoft.com/en-us/commandline/wsl/about), etc.)
+- [GNU Make](https://www.gnu.org/software/make/)
+- [NASM (Netwide Assembler)](http://www.nasm.us/)
+
+To compile, just run `make` in the top level directory.
+This should produce a file called PSOS.bin in the bin/ folder.
+
+####Installing:
+
+To install PSOS on a storage device, use the command: `dd if=PSOS.bin of=/dev/devicename && sync`.
+*Make sure that you do not accidentally install PSOS on your hard drive.*
+If you do, make sure you send me a video so I can laugh at you.
+
+####Running:
+
+The image file is called PSOS.bin and is located in the bin/ folder.
+This is a raw binary image. Not an ISO.
+Some emulators might have trouble with the format.
+If you have trouble, try emulating it as a floppy drive.
+PSOS uses BIOS functions to operate. For systems with UEFI, you may need to enable legacy support in your firmware settings.

README.txt

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+PSOS (Pretty Simple/Stupid Operating System)
+Version 1.0
+
+Description:
+
+PSOS is a (very) basic x86 16-bit operating system written in assembly.
+Currently all PSOS is, is a simple command line with 4 commands: CIRCLE, CLEAR, HELP, and VGATEST.
+
+- CIRCLE demonstrates VGA mode 13h by drawing a circle.
+- CLEAR clears the screen.
+- HELP displays a help message.
+- VGATEST displays the possible colors in VGA mode 13h.
+
+Note that these commands are in all-caps.
+This is because PSOS's keyboard driver does not currently support lowercase.
+The only other feature is text scrolling.
+If text reaches the bottom of the screen, it is scrolled up.
+This is still very buggy.
+
+Here is what I hope to accomplish in the next version:
+
+- Port PSOS to C
+- Implement exception handling
+- Add more commands
+- Implement filesystem
+- Implement VESA driver
+
+Compiling:
+
+Compilation Requirements:
+
+- Basic Nix* setup, or sad Windows imitation (MinGW, Cygwin, Bash for Windows, etc.)
+- GNU Make
+- NASM (Netwide Assembler)
+
+To compile, just run `make` in the top level directory.
+This should produce a file called PSOS.bin in the bin/ folder.
+
+Installing:
+
+To install PSOS on a storage device, use the command: `dd if=PSOS.bin of=/dev/devicename && sync`.
+*Make sure that you do not accidentally install PSOS on your hard drive.*
+If you do, make sure you send me a video so I can laugh at you.
+
+Running:
+
+The image file is called PSOS.bin and is located in the bin/ folder.
+This is a raw binary image. Not an ISO.
+Some emulators might have trouble with the format.
+If you have trouble, try emulating it as a floppy drive.
+PSOS uses BIOS functions to operate.
+For systems with UEFI, you may need to enable legacy support in your firmware settings.

makefile

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+#PSOS Version 1.0
+#Copyright (C) 2016 Ben Stockett.
+
+#This file is part of PSOS (Pretty Simple/Stupid Operating System).
+
+#PSOS is free software: you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation, either version 3 of the License, or
+#(at your option) any later version.
+
+#PSOS is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#GNU General Public License for more details.
+
+#You should have received a copy of the GNU General Public License
+#along with PSOS.  If not, see <http://www.gnu.org/licenses/>.
+
+FLAGS := -Isrc -f bin
+
+all: PSOS.bin clean
+
+PSOS.bin: loader.bin kernel.bin
+	cat bin/loader.bin bin/kernel.bin > bin/$@
+
+loader.bin: src/loader/loader.asm
+	nasm $(FLAGS) -Isrc/loader $^ -o bin/$@
+
+kernel.bin: src/kernel/kernel.asm
+	nasm $(FLAGS) -Isrc/kernel $^ -o bin/$@
+
+fs.bin: src/fs/fs.asm
+	make -C src/fs/prg
+	nasm $(FLAGS) -Isrc/fs $^ -o bin/$@
+
+.PHONY: clean
+clean:
+	rm bin/loader.bin bin/kernel.bin

src/fs/fs.asm

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+;PSOS Version 1.0
+;Copyright (C) 2016 Ben Stockett.
+
+;This file is part of PSOS (Pretty Simple/Stupid Operating System).
+
+;PSOS is free software: you can redistribute it and/or modify
+;it under the terms of the GNU General Public License as published by
+;the Free Software Foundation, either version 3 of the License, or
+;(at your option) any later version.
+
+;PSOS is distributed in the hope that it will be useful,
+;but WITHOUT ANY WARRANTY; without even the implied warranty of
+;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;GNU General Public License for more details.
+
+;You should have received a copy of the GNU General Public License
+;along with PSOS.  If not, see <http://www.gnu.org/licenses/>.
+
+db "/prg/help.bin", 0
+align 512
+;dw 0x0
+;align 512
+
+;db "help", 0x0
+;align 16
+;dw 0x0
+;incbin "/prg/help.bin"
+;align 512
+
+

src/fs/prg/circle/circle.asm

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+;PSOS Version 1.0
+;Copyright (C) 2016 Ben Stockett.
+
+;This file is part of PSOS (Pretty Simple/Stupid Operating System).
+
+;PSOS is free software: you can redistribute it and/or modify
+;it under the terms of the GNU General Public License as published by
+;the Free Software Foundation, either version 3 of the License, or
+;(at your option) any later version.
+
+;PSOS is distributed in the hope that it will be useful,
+;but WITHOUT ANY WARRANTY; without even the implied warranty of
+;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;GNU General Public License for more details.
+
+;You should have received a copy of the GNU General Public License
+;along with PSOS.  If not, see <http://www.gnu.org/licenses/>.
+
+[BITS 16]
+[ORG 0x7C00]
+
+%include "/loader/loader.inc"
+%include "/kernel/kernel.inc"
+
+CIRCLE:
+
+	mov bp, sp
+	sub sp, 8
+
+	fld dword [Radius]
+	fld dword [Step]
+	fldz
+
+	push 0x13
+	call SetVideoMode
+	add sp, 0x2
+
+	xor cx, cx
+
+	.Loop:
+
+		fld st0
+		fcos
+		fmul st3
+		fistp dword [bp - 0x8]
+
+		fld st0
+		fsin
+		fmul st3
+		fistp dword [bp - 0x4]
+
+		fadd st1
+
+		add dword [bp - 0x8], 160
+		add dword [bp - 0x4], 100
+
+		push word [bp - 0x8]
+		push word [bp - 0x4]
+		push 127
+		call SetPixel
+		add sp, 0x6
+
+		cmp cx, 0xFFFF
+		je .Return
+
+		inc cx
+
+	jmp .Loop
+
+	.Return:
+
+	push 5000
+	call Sleep
+	add sp, 0x2
+
+	push 0x3
+	call SetVideoMode
+	add sp, 0x2
+
+	call CLEAR
+
+	add sp, 0x8
+
+ret
+
+CS_CIRCLE: db "CIRCLE", 0x0
+Radius: dd 50.0
+Step: dd 1.0

src/fs/prg/clear/clear.asm

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+;PSOS Version 1.0
+;Copyright (C) 2016 Ben Stockett.
+
+;This file is part of PSOS (Pretty Simple/Stupid Operating System).
+
+;PSOS is free software: you can redistribute it and/or modify
+;it under the terms of the GNU General Public License as published by
+;the Free Software Foundation, either version 3 of the License, or
+;(at your option) any later version.
+
+;PSOS is distributed in the hope that it will be useful,
+;but WITHOUT ANY WARRANTY; without even the implied warranty of
+;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;GNU General Public License for more details.
+
+;You should have received a copy of the GNU General Public License
+;along with PSOS.  If not, see <http://www.gnu.org/licenses/>.
+
+CLEAR:
+
+	mov word [CharX], 0x0
+
+	call ClearScreen
+
+ret
+
+CS_CLEAR: db "CLEAR", 0x0