Welcome to the STF Remake H4 Build Guide. This guide is to help show you all the new features on the board and help you make decisions during the build on how you want your board to turn out.
H4 purchase Link - https://www.exxosforum.co.uk/atari/store2/#0167
Let's start with with fact that this board is still a DEV board it is in no way intended as a production board, as a direct replacement or a complete solution. It's intended to be closer to the end product with the community of helpers to diagnosing and testing the new features and ideas bourne from the original ALPHA remake. In addition there are various plug in boards in development such as the Flashy Clock, Trudie, Alt Ram boards with further testing will work to towards the final production board with these circuits built in.
To help you with your build there is a BOM, schematic and board layout available https://www.exxosforum.co.uk/forum/viewt ... =78&t=2167
Right let's get started with Part #1 which will take you through decisions for your board and to the point where SMT components are all onboard. Subsequent parts will follow over the coming weeks.
One of the reasons for the name Mongrel is that this board is a mismatch of different ways to produce a working ST. There are various options you can start with.
RAM - There are two options you can choose but make sure its only one of the following:
- 72 pin SIMM - You will require a SIMM socket
- Falcon RAM board - You will require headers to plug the Falcon RAM board into
GLUE and MMU - There are two options you can choose but make sure its only one of the following:
- SMT - GLUE or MMU - if you go down this route you can not remove easily to do any additional board development
- PLCC - GLUE or MMU - choosing this option allows you to easily remove the chips for further development
At this point you should have an idea based on the scavenged components you have which direction you are going, SMT or PLCC. One other advantage to going the PLCC route is that in the future when we look at a plugin FPGA board it will plug into the PLCC socket locations.
Whichever way you are going we recommend starting with getting the SMT components onto the board first. There are many SMT components as well as the GLUE and MMU, such as oscillators, capacitors, resistors and various ICs.
We would also recommend you read over the fixes thread to make sure you understand the patches that need to be performed with example pictures - https://www.exxosforum.co.uk/forum/viewt ... =78&t=2335