https://wikiti.brandonw.net/index.php?action=history&feed=atom&title=83Plus%3ABCALLs%3A522183Plus:BCALLs:5221 - Revision history2026-06-13T23:57:03ZRevision history for this page on the wikiMediaWiki 1.23.5https://wikiti.brandonw.net/index.php?title=83Plus:BCALLs:5221&diff=5629&oldid=prevBrandonw at 10:39, 18 February 20072007-02-18T10:39:06Z<p></p>
<p><b>New page</b></p><div>[[Category:83Plus:BCALLs:By Name|Chk_Batt_Level]][[Category:83Plus:BCALLs:By Name:Utility|Chk_Batt_Level]][[Category:83Plus:BCALLs:By Address|5221 - Chk_Batt_Level]]<br />
== Synopsis ==<br />
'''Unofficial Name:''' Chk_Batt_Level<br />
<br />
'''BCALL Address:''' 5221<br />
<br />
Check the batteries and returns their state in A.<br />
<br />
=== Inputs ===<br />
* None<br />
<br />
=== Outputs ===<br />
* A: Battery level from 0-4 (0 being lowest, 4 being freshest)<br />
<br />
=== Registers Destroyed ===<br />
* All<br />
<br />
== Comments ==<br />
This entry point puts the calculator into a special mode, polls bit 0 of port 2 several times, then puts the calculator back to normal.<br />
<br />
This BCALL only exists on OS 2.30 and above.</div>Brandonw