Changes
/* Range specifications and comparisons */
*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 ?
*CoAccording to old-CPU : PD8049computers.com website, all models seems to be retro compatible and have video modes from previous specifications.
*Built-in Peripherals : 6601 SR : 1 Floppy disk 1DD singolo lato, doppia densità
*Basic and firmware :N60, N60 Extended, N66, N66 SR
=CPC related?=
