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<TITLE>Int 17/AH=00h
</TITLE>
<META NAME="Description" CONTENT="
Int 17/AH=00h - PRINTER - WRITE CHARACTER -
AH = 00h
AL = character to write
DX = printer number (00h-02h)
Return: AH = printer status (see #00631)
Note: Under PhysTechSoft's PTS ROM-DOS the parallel port can also be
accessed as COM5.
BUGS: Some print spoolers trash the BX register on return.
Some original IBM BIOSes set more than one printer status bits at
a time, while only one of them is correct.
SeeAlso: AH=02h,AH=84hAX,AX=6F02h,AH=F1h,INT 16/AX=FFE3h,INT 1A/AH=11hNEC
">
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<h2>Int 17/AH=00h
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<h3><font color=#C00040>PRINTER - WRITE CHARACTER</font></h3>
<PRE>
AH = 00h
AL = character to write
DX = printer number (00h-02h)<br>
<p><b>Return:</b><br>AH = printer status (see #00631)
</PRE>
<p><b>Note:</b>
Under PhysTechSoft's PTS ROM-DOS the parallel port can also be
accessed as COM5.
<p><b>BUGS:</b>
Some print spoolers trash the BX register on return..
Some original IBM BIOSes set more than one printer status bits at
a time, while only one of them is correct.
<p><b>See Also:</b>
<a href="rb-2100.htm" tppabs="http://www.ctyme.com/intr/rb-2100.htm">AH=02h</a> - <a href="rb-2180.htm" tppabs="http://www.ctyme.com/intr/rb-2180.htm">AH=84h"AX"</a> - <a href="rb-2174.htm" tppabs="http://www.ctyme.com/intr/rb-2174.htm">AX=6F02h</a> - <a href="rb-2235.htm" tppabs="http://www.ctyme.com/intr/rb-2235.htm">AH=F1h</a> - <
<p><b>See Also:</b>
<a href="rb-6258.htm" tppabs="http://www.ctyme.com/intr/rb-6258.htm">INT 4B/AH=00h</a> - <a href="rb-2094.htm" tppabs="http://www.ctyme.com/intr/rb-2094.htm">PORT 0278h"PRINTER"</a> - MEM 0040h:0008h - MEM 0040h:0078h
<PRE>
<p>
Bitfields for printer status:
<a name=table631></a>
Bit(s) Description (Table 00631)
7 not busy
6 acknowledge
5 out of paper
4 selected
3 I/O error
2-1 unused
0 timeout
</PRE>
<p><b>Notes:</b>
If both, bit 5 "out of paper" and 4 "selected" are set, the MS-DOS/
PC DOS kernel assumes that no printer is attached..
For Tandy 2000, bit 7 indicates printer-busy when set rather than clear
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Int 17h</a>
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