Table of Contents
Note: This API call is for DOS personality only. Use Family API for portability.
Int 21H, AH=44H, AL=06H
Version
2 and higher
Brief
GET INPUT STATUS
Family API
Input
AX = 4406h BX = file handle
Return
CF clear if successful
AL = input status 00h not ready (device) or at EOF (file) FFh ready AH may be destroyed (refer to note) CF set on error AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Macro
Notes
files may not register as being at EOF if positioned there by AH=42h under DOS 5.0, on a successful return, AH contains either the next character which will be read or 1Ah if at EOF; under a Windows95 DOS box, AH seems to be either unchanged or 00h this function was not supported by Digital Research's DOS Plus the CLOCK$ device under DR DOS 3.41 always indicates 'Ready'; this was corrected in v5.0
See also
AX=4407h,INT 2F/AX=122Bh
Note
Text based on Ralf Brown Interrupt List Release 61