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AX = 4403h BX = file handle for character device "CONFIG$" CX = number of bytes to write DS:DX -> buffer containing ???
Return:
CF clear if successful AX = number of bytes actually written CF set on error AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note: IOCTL Output to CONFIG$ is only available while IO.SYS is booting the system; once CONFIG.SYS has been processed, this call always succeeds, ignoring any input
See Also: AX=4403h"CONFIG$"
Category: DOS Kernel - Int 21h - M
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