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. 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. 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 …
UT-88. Using OS CP/M. Part 2/2.
In this post, we will check some programs for CP/M and learn how to load your programs on “RAM-disk”. External command POWER is intended to work with files in a RAM and the “RAM-disk”. It allows you to view files, …
UT-88. Using OS CP/M. Part 1/2.
Finally, we reached the most exciting part – we will launch the CP/M operation system on “UT-88”. This system was initially developed in 1975 by Gary Kildall of Digital Research, Inc. for Intel 8080-based computers. “UT-88” is based on the …
UT-88. MONITOR-F for the complete configuration
In the previous post, we learned how to launch the computer in complete configuration. Let’s see how it works and what commands MONITOR-F has. As you remember, Monitor-F can be launched from address F800H using the command 7 F800. MONITOR-F setups …
UT-88. Running the complete configuration.
I hope you enjoyed playing with the minimal configuration of the computer. Now let’s see how it can be launched in complete configuration. “UT-88” computer is supposed to be built step by step, starting with minimal configuration and then adding …
UT-88. How to use the minimal configuration with MONITOR-0.
In the previous post, we learned how to launch the computer in the minimal configuration. Now let’s see how it works in detail. MONITOR-0, which is responsible for the minimal configuration’s computer work, is allocated in the ROM in the range …