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Multi User

Multi Screen

Multi Tasking




Retro UNIX 386 v1.2 hd0 start screen


RETRO UNIX 386 v1.2 (Retro UNIX v2 file system)  (intermediate version between v1.1 and v2.0)


            Complete kernel source code: unix386.txt  - Retro UNIX kernel version: -

Kernel Files:


unix386.s u0.s u1.s u2.s u3.s u4.s u5.s u6.s u7.s u8.s u9.s ux.s memory.s sysdefs.s

diskinit.s diskdata.s diskbss.s diskio.s

keyboard.s kybdata.s

video.s vidata.s

Kernel files are in runix386v1.2_kernel_src sub directory of www.singlix.com/runix/ web site



NASM v2.15  (nasm unix386.s -l unix386.txt -o unix386 -Z error.txt)

Installers:  (dos programs which can run on 32 bit windows)

fdimage.com hdimage.com unixfdfs.com unixhdfs.com unixcopy.com unixhdcp.com (dos)

fdisk3.com fdisk4.com (dos) & rawwrite.exe (windows)


Installation files are in runix386v1.2_install_src sub directory of www.singlix.com/runix/ web site

Boot (Startup File): boot source code: boot5.asm
Default Kernel name: unix source code: retrounix386_v12_kernel_src.zip


Unixfdfs readme file: unixfdfs_readme.txt

Unixcopy readme file: unixcopy_readme.txt

Bootable (1.44MB) floppy disk images, (54MB) hard disk images and EMULATORS:



            Other files are in runix386v1.2 directory

           Retro UNIX 386 v1.2 (unix v1 clone/port on runix v2 fs) Operating System Initialization Files:

           init8.s (etc/init) getty3.s (/etc/getty) login1.s (/bin/login) sh1.s (/bin/sh)
           passwd.txt (/etc/passwd) motd.txt (/etc/motd)

           Basic Utilities: ls2.s (/bin/ls) cat1.s (/bit/cat) cls.s (/bin/cls) ctime386.s (/bin/ls)
           Sample Programs:
hello.s args.s forktest.s clock.s scancode.s ttydemo.s mkdir2.s rmdir3.s

1.44 MB Bootable floppy disk image: fd0.zip   54 MB Hard disk image: hd0.zip


type "unix" at boot prompt then type ESC key or ENTER key when it is requested

(Retro UNIX 386 v1.2 Kernel v0.2.2.3 will run)
type ALT + F2, ALT + F3, ALT + F1, ALT + F4 ... ALT + F8 keys for multiscreen test

At first, /bin/sh will run (if you press ESC key when it is requested); then you can write 'ls -l .' at the command prompt (/bin/ls will run);

other test programs: /usr/bin/hello, /erdogan/args, /erdogan/forktest, /erdogan/ttydemo, /erdogan/scancode.


Note: Type '?' at boot prompt to see valid boot commands

ALL FILES: https://www.singlix.com/runix/runix386v1.2/

Retro UNIX 386 v2 Operating System : (Not ready yet!)

Files: https://www.singlix.com/runix/runix386v2/

ALL Files: https://www.singlix.com/runix/files.html


Last Update: 27/12/2022