*6001 : no built in mass data storages
*6601 : Floppy disk interface and drive
*CPU : PD 780C-1, seems to be Z80 clone with various clocking, according to video system.
*Co-CPU : PD8049 : video chip ? soem sources say it is I/O chip.
*CoAccording to old-CPU : PD8049computers.com website, all models seems to be retro compatible and have video modes from previous specifications.
==Palette==
Here is a comparison between Amstrad CPC palette (theric colours) and PC-6001mk2 supposed palette.
[[File:NEC PC6001 palette.png]]
*The palette has 15 colours and one transparency channel ink enabling to overly the computer's video over another TV video (as done with MSX1 or Thomson MO5/TO7 computers)
*This palette is actually available on Amstrad CPC computers as it features black+grey+white, the 6 basic RGB cube colors : Red, Green, Blue, Cyan, Magenta and yellow, and cross colours : Orange, Lime, Seagreen, Mauve, Purple, Sky blue (those are CPC palette names)
*It is quite an exotic and colorful palette, and it doesn't enable proper gradiants like most other comparable 16 ink palettes.
=CPC related?=
Those are basically Amstrad CPCs with extra sound capability and less video modes and palette.
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=Links=
*http://www.old-computers.com/museum/computer.asp?st=1&c=177
*http://www.old-computers.com/museum/computer.asp?c=393
*http://www.old-computers.com/museum/computer.asp?st=1&c=394
*Japanese website for an emulator : http://papicom.net/p6v/index.html
(you should try to get it translated)