ROM from Odessa clone "Professional"

Hello, All Today they gave me a SABZH. When starting, a black square appears on the display (see attachment), when removing the ROM - mattress. I thought it was a ROM issue. :v2_conf2; Brought; mikruhu home, dumped it, slipped ROM into the emulsion - it works! :) From The original firmware differs only in the inscription and a different key sound (C) 1991 Professional Ltd But it will go into the collection of rums. I give it. ;) By the way, what could happen to the speck? I haven't measured the voltage yet. Maybe he won't is that enough? File: prof.rar http://zx.pk.ru/attachment.php?attachmentid=4491 File: Gluk.jpg http://zx.pk.ru/attachment.php?attachmentid=4492