512DevOS 0.03 README
By Anthony De Feo
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To install
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DOS/Windows users: Put a floppy disk (with no important data) in drive A:, and run install.bat.  If you want to use 512DevOS under bochs, press CTRL-C when install.bat gets to "Press any key to continue...", and use devos.img as as an emulated floppy disk.  If you want to run it on a real computer, boot with the floppy in your A: drive.  

*nix users: Run "dd if=devos.img bs=1024 of=/dev/xxx" where "xxx" is your floppy disk drive.  Boot with the disk in your first floppy drive.  

Usage
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Press "h" at the prompt for help while the OS is running.  Commands are not case-sensitive  
The commands are:
c = Clear screen
o = relOad 512DevOS
r = Reboot computer
h = Help
v = Version information 
s = System halt 
f = Screensaver (I ran out of letters, no reason why this is "f")
F1 = load sector 1 from the floppy disk
F2 = load sector 2 from the floppy disk
F3 = load sector 3 from the floppy disk
F4 = load sector 4 from the floppy disk
F5 = load sector 5 from the floppy disk

Notes
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This release expands the sector loading code to sectors 4 and 5 (accessable via F4 and F5).  Also, user programs may use a new interrupt, 0x23, to load sectors.  Its arguments are that of the standard BIOS, int 0x13, ah=2 function:

-Destination at ES:BX
-CL=sector
-DL=drive
-AL=number of sectors
-CH=cylinder
-DH=head

The test program has been slightly changed; at the end, it jumps to the kernel at 0x0000:0x07C0 instead of calling int 0x19.  

Thank Yous
-------------------
Thanks to everyone that contributed code.  Benjamin David Lunt of Forever Young Software helped greatly to debug the sector-loading code.  The original F1-F3 keys idea came from Christoffer Bubach.  I thank anyone who supports, works on, or uses this OS.  

Thanks again,
Anthony De Feo <xdatadrainx90@gmail.com>
http://512dev.us.tt