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DECR - Revision history
2026-05-14T18:20:29Z
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Mr z: Protected "DECR" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))
2010-12-04T08:15:33Z
<p>Protected "<a href="/index.php/DECR" title="DECR">DECR</a>" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))</p>
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Mr z
http://wiki.intellivision.us/index.php?title=DECR&diff=1408&oldid=prev
Pingaso at 17:46, 12 January 2005
2005-01-12T17:46:28Z
<p></p>
<p><b>New page</b></p><div>[[Category:CP1610]]<br />
<table border><br />
<tr><td>Instruction Name</td><td>Decrement Register</td></tr><br />
<tr><td>Mnemonic</td><td>DECR</td></tr><br />
<tr><td>CP1610 Clock Cycles</td><td>6</td></tr><br />
<tr><td>Interruptible</td><td>Yes</td></tr><br />
<tr><td>Opcode Range</td><td>$0010-$0017</td></tr><br />
<tr><td>Input Flags</td><td>None</td></tr><br />
<tr><td>Output Flags</td><td>[[Sign Flag]], [[Zero Flag]]</td></tr><br />
</table><br/><br />
The Decrement Register (DECR) instruction decrements the specified register by one (1) and sets or clears the [[Sign Flag]] and [[Zero Flag]] according to the results.<br/><br />
<br />
0000:0000:0001:0rrr<br/><br />
where:<br />
rrr indicates the target register<br />
such that:<br />
rrr == 000 indicates register R0<br />
rrr == 001 indicates register R1<br />
rrr == 010 indicates register R2<br />
rrr == 011 indicates register R3<br />
rrr == 100 indicates register R4<br />
rrr == 101 indicates register R5<br />
rrr == 110 indicates register R6<br />
rrr == 111 indicates register R7</div>
Pingaso