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Copyright 1991 David Jurgens |
INT 21,A - Buffered Keyboard Input
AH = 0A
DS:DX = pointer to input buffer of the format:
│ max │ count │ BUFFER (N bytes)
│ │ └────── input buffer
│ └──────────── number of characters returned (byte)
└────────────── maximum number of characters to read (byte)
returns nothing
- since strings can be pre-loaded, it is recommended that the
default string be terminated with a CR
- N bytes of data are read from STDIN into buffer+2
- max buffer size is 255, minimum buffer size is 1 byte
- chars up to and including a CR are placed into the buffer
beginning at byte 2; Byte 1 returns the number of chars
placed into the buffer (extended codes take 2 characters)
- DOS editing keys are active during this call
- INT 23 is called if Ctrl-Break or Ctrl-C detected
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| Esc or Alt-X to exit |
int 21,a |
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