nx_x86_dosfs_gate.nx

nx_x86_dosfs_gate.nx -- R-DOS1: Nishi-DOS file I/O over a sovereign virtual FS (our own, clean-room). The host pre-loads one file "FILE" = "NISHI-DOS!$" into the Nishi FS. The program then, via our own INT 21h: opens "FILE" (3Dh), reads it (3Fh) into a buffer, and prints it (09h). Proves a real program loads and reads its own data file through DOS services we wrote ourselves -- no MS-DOS, no FreeDOS. B4 3D / B0 00 / BA 40 01 / CD 21 open "FILE"@0x140 -> AX=handle 89 C3 MOV BX,AX B4 3F / B9 0B 00 / BA 00 03 / CD 21 read 11 bytes -> buffer@0x300 B4 09 / BA 00 03 / CD 21 print buffer ($-terminated) B4 4C / CD 21 terminate