title: S-OS
text: # S-OS
  
  S-OS is a simple operating system mainly for Z80 based computers. The operating system was first presented in 1986 in the Japanese magazine Oh!X in an article called "The Sentinel".
  
  ## Commands
  
  The command and command set is very simplified.
  
      Directory #D [<device name>:]
      Change default device (S=startup, A=tape..) #DV <device name>:
      Jump to address (and run program) #J <address>
      Load the program #L <filename>[:<address>]
      Enter the machine specific monitor #M
      Delete the file #K <file name>
      Save a memory block to file #S <filename>: <start address>: <end address>[: <execution address>]
      Exit from S-OS and reboot #!
  
  ## Supported systems
  
  * Sharp MZ-80K/C/1200
  * Sharp MZ-700 / 1500
  * Sharp MZ-80B / 2000 / 2200
  * Sharp MZ-2500/2861(MZ-2500 mode)
  * Sharp X1/C/D/Cs/Ck/F/G/Twin (two different implementations)
  * Sharp X1turbo/II/III/Z/ZII/ZIII
  * NEC PC-8001/8801
  * NEC PC-6001mkII/6601/SR
  * Sony SMC-777C
  * Toshiba PASOPIA
  * Fujitsu FM-7 / 77 (Z80 extension card)
  * Sharp X68000 (emulated Z80)
  * PC-286/NEC PC-9801 (emulated Z80)
  * MSX 2 / 2+ / turboR
  * Casio FP-1000 / 1100
  * Windows 32 bit (emulated Z80)
  * Sharp calculators PC-G850/S/V/VS
  