Basic Disk Operating System (BDOS) Functions
CONSOLE
OUTPUT
ENTRY
CL:
02H
DL: ASCII
Character
RETURN
FUNCTION
2
CONSOLE
OUTPUT
The
Console
Output
function sends the ASCII character in
DL
to
the logical
console.
Tab
characters expand in columns
of
eight characters. This function also
makes a check for
start/stop
scroll (CONTROL-S).
READER
INPUT
ENTRY
RETURN
CL:
03H
FUNCTION
3
AL: ASCII Charactel
READER
INPUT
The
Reader
input
function reads the next character from the logical reader
(READER)
into register AL.
Control
does
not
return to the calling
program
until a
character has been read.
PUNCH
OUTPUT
ENTRY
CL: 04H
DL: ASCII
Character
RETURN
FUNCTION
4
PUNCH
OUTPUT
The
Punch
Output
function sends the ASCII character in register
DL
to
the logical
·punch device
(PUNCH).
4-5
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