Category: <b>runtime support</b>
<p>
<pre><b>INT 90 - APL*PLUS/PC - USED BY PORT 10 PRINTER DRIVER</b>

--------r-91
INT 91 - IBM ROM BASIC - used while in interpreter
Notes:	called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
	BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 90,INT 92
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