Moving AGAT-7 retro-computer project to the “Retrobyte” platform
As you may remember, I’ve designed a universal platform for building retro-computers, “Retrobyte”. I successfully tested it by creating the “Mikro-80” computer a few months ago, and now I’m working on adapting my other retro-computer project “AGAT-7”, to this platform. …
AGAT-7. Rev.0 summary and start of Rev.A design.
I’m finalising my Rev.0 of the modern retro-computer “AGAT-7” replica. The next step will be Rev.A design with fixed mistakes, improvements, and new ideas. In this post, I’m going to summarise the Rev.0 experience and share with you some ideas …
Agat-7. Rev.0. CPU, memory and joystics
Let’s go to the following part of the schematic. Today it is the CPU, the SRAM and the joysticks. Here it is: “Agat-7” has 96Kb of RAM, so we need a 128Kb SRAM chip. We can use 128K x 8bit …
Agat-7. Rev.0. Floppy-drives emulators.
At the moment, I’ve completed the schematics, and I’ve started to work on the PCB layout. There will be some changes caused by discovered mistakes or better layouts. So, please, treat it as a draft at this stage. Please, let …
Agat-7. Rev.0. Video output.
I’ve spent some time debugging STM32L based 140K “floppy drive” for my “Agat-7” replica project. It is already perfectly workable in read-only mode. I transferred it to the SPI interface to save some FPGA pins, and now I need only …
Agat-7. What has been already done.
In this post, I will show what has been done in the project. First, an extension board for DE1, which contains a socket for 6502 CPU, was made. I used a toner transfer method to make a PCB. The board …
Agat-7. Project concept.
Let’s discuss the concept of the replica of the Agat-7 computer. This version is not final and can be (and most likely will be) adjusted. As usual, all your ideas are welcome! CPU. The project will use a Bulgarian 6502 …
Agat-7. Introduction.
After the “UT-88” computer’s trial project, let’s start with a much more serious project. We will design and build another Soviet computer – AGAT-7. In this case, the DE1 board will be used only for prototyping – the computer will …