https://wikiti.brandonw.net/index.php?action=history&feed=atom&title=84PCSE%3ABCALLs%3A5509 2026-06-09T21:23:16Z Revision history for this page on the wiki MediaWiki 1.23.5 https://wikiti.brandonw.net/index.php?title=84PCSE:BCALLs:5509&diff=10150&oldid=prev 2013-09-01T03:03:28Z

<p>Created page with &#039;<a href="/index.php?title=Category:84PCSE:BCALLs:By_Name:GetBatteryLevel&amp;action=edit&amp;redlink=1" class="new" title="Category:84PCSE:BCALLs:By Name:GetBatteryLevel (page does not exist)">GetBatteryLevel</a> <a href="/index.php?title=Category:84PCSE:BCALLs:By_Name" title="Category:84PCSE:BCALLs:By Name">GetBatteryLevel</a> <a href="/index.php?title=Category:84PCSE:BCALLs:By_Address" title="Category:84PCSE:BCALLs:By Address">5509 - GetBatteryLevel</a>…&#039;</p> <p><b>New page</b></p><div>[[Category:84PCSE:BCALLs:By Name:GetBatteryLevel|GetBatteryLevel]] [[Category:84PCSE:BCALLs:By Name|GetBatteryLevel]] [[Category:84PCSE:BCALLs:By Address|5509 - GetBatteryLevel]]<br /> == Synopsis ==<br /> '''Unofficial Name:''' GetBatteryLevel<br /> <br /> '''BCALL Address:''' 5509h<br /> <br /> Measures the current battery level by writing and reading several ports and using lots of delay loops.<br /> <br /> === Inputs ===<br /> None.<br /> <br /> === Outputs ===<br /> * A = 0 if the battery is fully dead. Do a hard power off fast or you risk damaging the lithium battery.<br /> * A = 4 if the battery is fully charged, or at least about 70 or 80 percent charged.<br /> * A = 1-3 for intermediate charge levels.<br /> <br /> === Destroys ===<br /> * AF, BC<br /> <br /> == Comments ==<br /> There isn't any particular code in here to test whether the battery is currently charging as far as I can tell. Contains a delay loop that overwrites 9F02h. Screws with IY+16h. Uses ports 3A and 04.</div>

Dr. D'nar