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<TITLE>Int 21/AH=20h
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Int 21/AH=20h - S/DOS 1.0+ & PTS-DOS 6.51+ - GET OEM REVISION -
AH = 20h
AL = which OEM code to retrieve
00h get PTS OEM code
Return: CF cleared
AL = OEM code (currently always 00h)
01h get PTS OEM revision code
Return: CF cleared
AL = revision code (default is 00h, but may vary)
Desc: S/DOS is a reduced and modified PTS-DOS 6.51 release with source code
on CD
">
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<h2>Int 21/AH=20h
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<h3><font color=#C00040>S/DOS 1.0+ & PTS-DOS 6.51+ - GET OEM REVISION</font></h3>
<PRE>
AH = 20h
AL = which OEM code to retrieve
00h get PTS OEM code
<p><b>Return:</b><br>CF cleared
AL = OEM code (currently always 00h)
01h get PTS OEM revision code
<p><b>Return:</b><br>CF cleared
AL = revision code (default is 00h, but may vary)
</PRE>
<p><b>Desc:</b>
S/DOS is a reduced and modified PTS-DOS 6.51 release with source code
on CD
<p><b>Note:</b>
This function is provided by S/DOS 1.0 (and is most probably also
supported with PTS-DOS 6.51+, maybe even earlier). It clears the
CF flag for all other AL arguments, too. However, AL = 00h and 01h
are handled separately. The revision code can be individually defined
in the MAKEFILE at compilation time..
The PTS OEM code does not correlate with the DOS OEM code returned
by INT 21/AH=30h, likewise the PTS OEM revision does not correlate
with the DOS revision returned by INT 21/AX=3306h.
<p><b>See Also:</b>
<a href="rb-2711.htm" tppabs="http://www.ctyme.com/intr/rb-2711.htm">INT 21/AH=30h</a> - <a href="rb-2730.htm" tppabs="http://www.ctyme.com/intr/rb-2730.htm">INT 21/AX=3306h</a>
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