Table of Contents
Note: This API call is for DOS and Win16 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
| osFree Macro Library | |
|---|---|
| Video I/O | @SetMode @SetCurSz @SetCurPos @GetCur @SetPage @ScrollUp @ScrollDn @Scroll @GetChAtr @PutChAtr @PutCh @SetPalet @SetColor @SetDot @GetDot @WrtTTY @VideoState @GetMode @GetDisplay @GetVideoState @GetEGAInfo @Cls |
| Hardware info | @Equipment @MemSize |
| Serial I/O | @AuxInit @AuxSendChar @AuxRecieveChar @AuxStatus |
| Tape I/O | @TapeOn @TapeOff @TapeRead @TapeWrite |
| Keyboard I/O | @KbdStatus @CharIn @CharPeek |
| Printer I/O | @PrnPrint @PrnInit @PrnStatus |
| Disk I/O | @DskReset @DskStatus @DskRead @DskWrite @DskVerify @DskFormat |
| Date and Time | @SetTime @GetTime |
| Mouse | @MouInit @MouShowPointer @MouStatus @MouSetPos @MouSetMickey @MouRegion |
| Memory manager | @ModBlok SET_BLOCK |