How to call some functions that you might though it is simle sometimes, but it could take your worthful time. Try these short routes as fun whenever you take a break.

Packet : 55593401c4bios.zip filelist
DOS_BIOS/
DOS_BIOS/BDOS.C
DOS_BIOS/COUNTRY.C
DOS_BIOS/CTRLBRK.C
DOS_BIOS/DTA.C
DOS_BIOS/KEYSTATE.C
DOS_BIOS/PRINTCHK.C
DOS_BIOS/SETCOM1.C
DOS_BIOS/SHOWEQUP.C
DOS_BIOS/SIREN.C
DOS_BIOS/SLEEP_5.C

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