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<title>INT 33,18 - Set alternate subroutine call mask and address</title>
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<h1><a name="kap_interrupt_3390"></a>INT 33,18 - Set alternate
subroutine call mask and address</h1>
<p> AX = 18h</p>
<p> DX = offset to function</p>
<p> CX = user interrupt mask:</p>
<p> ¦F-8¦7¦6¦5¦4¦3¦2¦1¦0¦ user interrupt mask in CX</p>
<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +--- alt key pressed during event</p>
<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- ctrl key pressed during event</p>
<p> ¦ ¦ ¦ ¦ ¦ ¦ +----- shift key pressed during event</p>
<p> ¦ ¦ ¦ ¦ ¦ +------ right button up event</p>
<p> ¦ ¦ ¦ ¦ +------- right button down event</p>
<p> ¦ ¦ ¦ +-------- left button up event</p>
<p> ¦ ¦ +--------- left button down event</p>
<p> ¦ +---------- cursor moved</p>
<p> +------------ unused</p>
<p> - entire mask is set to zero when ~INT 33,0~ is called</p>
<p> - up to three handlers may be defined with this call</p>
<p> - mask should be cleared before program exit</p>
<p> - when handler is called it receives parameters in the
following</p>
<p> registers:</p>
<p> AX = condition mask causing call</p>
<p> CX = horizontal cursor position</p>
<p> DX = vertical cursor position</p>
<p> DI = horizontal counts</p>
<p> SI = vertical counts</p>
<p> DS = mouse driver data segment</p>
<p> BX = button state:</p>
<p> ¦F-2¦1¦0¦</p>
<p> ¦ ¦ +--- left button (1 = pressed)</p>
<p> ¦ +---- right button (1 = pressed)</p>
<p> +------ unused</p>
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<td width="33%">Zurück zum <a href="inte1at0.htm">Interrupt
Info</a>. </td>
<td align="center" width="33%"><a
href="mailto:Roger.Morgan@htl-steyr.ac.at">Roger Morgan</a>
/ 1998 </td>
<td align="right" width="33%"><font size="1">L.Änderung <!--webbot
bot="Timestamp" s-type="EDITED" s-format="%d.%m.%y"
startspan -->29.03.99<!--webbot bot="Timestamp" endspan
i-checksum="13964" --> </font></td>
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