Changes

Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /mnt/cpcwiki-httpdocs/includes/diff/DairikiDiff.php on line 434
*[https://bitsavers.org/pdf/ibm/pc/pc/6025008_PC_Technical_Reference_Aug81.pdf IBM PC Hardware Technical Reference]*[http://bitsavers.org/pdf/ibm/pc/pc_jr/PCjr_Technical_Reference_Nov83.pdf IBM PCjr Hardware Technical Reference]*[http://www.retroarchive.org/dos/docs/ibm5160techref.pdf IBM PC XT Hardware Technical Reference]*[https://bitsavers.org/pdf/ibm/pc/at/1502494_PC_AT_Technical_Reference_Mar84.pdf IBM PC AT ] Hardware Technical Reference]