master circuit 48k

Hello Conan after some thought, I decided to upgrade this miracle of technology, so several came up Questions for fellow hobbyists: 1.need a diagram. guys, who has it - please help, otherwise I dug around on the forum, there is only one link http://zx.pk.ru/attachment.php?attachmentid=1256, but she was killed... :v2_cry; 2.disk drive controller diagram. in principle, this follows from the first, but maybe Has anyone done this before me, I would really like to know how. 3. you need a diagram of a Rubik computer... there is nothing at all for this piece of hardware, not even wiring connectors...that's what they call a ton of....maybe there's something wrong with it too I'll do it....later.... for reference: PC master 48k, Angstrom plant, serial number N1593, date production 02.1994 Best regards, vik