https://wikiti.brandonw.net/api.php?action=feedcontributions&feedformat=atom&user=195.56.10.239 2026-04-08T12:24:10Z User contributions MediaWiki 1.23.5 https://wikiti.brandonw.net/index.php?title=83:Ports:02 2005-04-04T22:03:19Z

<p>195.56.10.239: /* Write Values */ - corrected an error; some bits were swapped</p> <hr /> <div>== Synopsis ==<br /> '''Port Number:''' 02h<br /> <br /> '''Function:''' ROM and RAM Pager<br /> <br /> This port controls what page is swapped into the 4000h to 7FFFh range.<br /> <br /> === Read Values ===<br /> Always the last value output is read back.<br /> <br /> === Write Values ===<br /> * Bits 0 to 2: The lower 3 bits of the desired ROM page (bit 3 can be set through bit 4 of the [[83:Ports:00|link port]])<br /> * Bit 3: Must be 1, otherwise the the calculator crashes<br /> * Bit 4: Unknown, harmless<br /> * Bit 5: Unknown, harmless<br /> * Bit 6: 0 - the specified ROM page is swapped in, 1 - the RAM page specified by bit 0 swapped in (0 causes it to mirror the page at C000h, 1 mirrors the page at 8000h)<br /> * Bit 7: Must be 1, otherwise the the calculator crashes<br /> <br /> == Credits and Contributions ==<br /> * created by CoBB<br /> <br /> [[Category:83:Ports:By Address|02 - ROM and RAM pager]]<br /> [[Category:83:Ports:By Name|ROM and RAM pager]]</div>

195.56.10.239