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 …
UT-88. Description. Minimal configuration launch
To build the “UT-88” replica, I created an extension board for DE1. I’ve added six 7-segment indicators and a 16-key keypad, almost like the original “UT-88” in minimal configuration. The board should be connected to the GPIO_1 extension header of …