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 [ :]
 * Change default device (S=startup, A=tape..) #DV :
 * Jump to address (and run program) #J 
 * Load the program #L [: ]
 * Enter the machine specific monitor #M
 * Delete the file #K 
 * Save a memory block to file #S : : [: ]
 * 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