F4/FMPAC Adapter Board for Yamaha YIS805 version 1.0 Copyright (c) 2019 RBSC The board relocates the Z80 socket, that is partially covered by YIS805's power supply casing to a different place and allows to install additional hardware into the Z80 CPU socket. The board is primarily designed to install the RBSC's F4/FMPAC combo board. However, other boards can be also installed, for example the 2mb RAM expansion made by Andrey Koryakin. Assembling ---------- Assembling of the board is very easy. Just soder two 20-pin headers and the 40-pin DIP socket onto the board as shown on the pictures. It's advised to clean up the board from flux after soldering. Installation ------------ The board must be installed into the default CPU socket (socket installation must be done beforehand) from one side and onto 2 special holders from the other side. The holders must be glued to the motherboard with the help of 2-sided sticky tape. The board must be then secured on top of the holders with 2 small screws. The 3D models of the holders can be found here: https://www.thingiverse.com/thing:3860033 Please note that if the adapter board is not properly secured, it may detach from the motherboard and cause damage to the computer's internals! IMPORTANT! ---------- The RBSC provides all the files and information for free, without any liability (see the disclaimer.txt file). The provided information, software or hardware must not be used for commercial purposes unless permitted by the RBSC. Producing a small amount of bare boards for personal projects and selling the rest of the batch is allowed without the permission of RBSC. When the sources of the tools are used to create alternative projects, please always mention the original source and the copyright! Contact information ------------------- The members of RBSC group Ptero, Wierzbowsky, Tnt23, Pencioner and DJS3000 can be contacted via the MSX.ORG or ZX-PK.RU forums. Just send a personal message and state your business. The RBSC repository can be found here: https://github.com/rbsc -= ! MSX FOREVER ! =-