Put Joe LoCicero's CPU-Doc and David Shadoff's posts about video and PSG into one file and formatted it.
Joe LoCicero's Homepage is at http://joyce.eng.yale.edu/tginternals/, there is a hypertext version of the CPU-documentation and hardware info.
Added BIOS-reference
Added David Woodford's post about the CD* and AD* functions and a section about the CD-ROM format used by the
PC-Engine. Added Credits/History section.
Added a description of the VDC-status register. Changed a few lines, checked the spelling using Word.
Added information about the IRQ-controller and VDC reg #15 from
FanWen Yang <yangfanw@ms4.hinet.net>
Added some information about the SuperGrafx from David Michel
Added some timer information
Finally made a LaTeX version
Added David Michel's information about CD* functions, and a few
corrections