https://wikiti.brandonw.net/index.php?action=history&feed=atom&title=83Plus%3ABCALLs%3A4C30 2026-05-18T18:32:26Z Revision history for this page on the wiki MediaWiki 1.23.5 https://wikiti.brandonw.net/index.php?title=83Plus:BCALLs:4C30&diff=9227&oldid=prev 2010-07-09T17:00:42Z

<p>added that length of 1 clears ram</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 17:00, 9 July 2010</td> </tr><tr><td colspan="2" class="diff-lineno">Line 18:</td> <td colspan="2" class="diff-lineno">Line 18:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Comments ==</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Comments ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This routine uses an LDIR instruction to clear the memory block, so do not pass it a block length of 0 or it will erase 65536 bytes.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>This routine uses an LDIR instruction to clear the memory block, so do not pass it a block length of 0 <ins class="diffchange diffchange-inline">or 1 </ins>or it will erase 65536 bytes.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Example ==</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Example ==</div></td></tr> </table>

Thepenguin77 https://wikiti.brandonw.net/index.php?title=83Plus:BCALLs:4C30&diff=5165&oldid=prev 2006-08-30T03:38:34Z

<p></p> <p><b>New page</b></p><div>[[Category:83Plus:BCALLs:By_Name:Memory|MemClear]] [[Category:83Plus:BCALLs:By_Name|MemClear]] [[Category:83Plus:BCALLs:By_Address|4C30 - MemClear]]<br /> == Synopsis ==<br /> '''Official Name:''' MemClear<br /> <br /> '''BCALL Address:''' 4C30<br /> <br /> Sets a block of memory to zero.<br /> <br /> === Inputs ===<br /> * HL: Address of memory block.<br /> * BC: Number of bytes to zero.<br /> <br /> === Outputs ===<br /> * DE: Points to byte after memory block.<br /> <br /> === Destroys ===<br /> * AF, BC, HL<br /> <br /> == Comments ==<br /> This routine uses an LDIR instruction to clear the memory block, so do not pass it a block length of 0 or it will erase 65536 bytes.<br /> <br /> == Example ==<br /> &lt;nowiki&gt;<br /> ld hl,appBackUpScreen<br /> ld bc,768<br /> B_CALL MemClear&lt;/nowiki&gt;</div>

Dan Englender