Warning: Missing argument 2 for get_post_meta(), called in /home/electron/public_html/wp-content/plugins/insert-javascript-css/insert-javascript-css.php on line 78 and defined in /home/electron/public_html/wp-includes/post.php on line 1465

AGAT-7. Rev.0 summary and start of Rev.A design.

Tags: No Tags
Comments: No Comments
Published on: 01/05/2013

I’m about to finalise my Rev.0 of the modern replica of the retro-computer “AGAT-7”. The next step will be Rev.A design with fixed mistakes, improvements and some new ideas. In this post I’m going to summarise the Rev.0 experience and share with you with some ideas for Rev.A. At the [...]

Clock generation in FPGA with phase accumulator. Calculation and limits.

Tags: No Tags
Comments: No Comments
Published on: 13/04/2013

In my project of a modern replica of a retro computer “Agat-7” I needed to generate several different clocks. Some of them can be produced by the PLL built in FPGA, others are a simple division of the main clock. But there is another group of clock signals that are [...]

Hobby electronics lab

Categories: My Projects
Tags: No Tags
Comments: No Comments
Published on: 28/03/2013

I organised a temporary place for my hobby when I moved the house. It quickly became a mess because it didn’t have any drawers or shelves there. So, finally, I’ve decided to build a decent place for my home lab. I didn’t want to spend a lot of money on [...]

Launching “HALO 2 for Windows Vista” on Windows 7

Categories: Software
Tags: No Tags
Comments: No Comments
Published on: 20/01/2013

My son got XBOX before Christmas and I couldn’t resist trying it. So, now I have some rest from my electronics hobby. Apart of this I’m building my hobby working place instead of the messy temporary one that I’ve used. I’ll do a post about it as well when it [...]

Review of LCR-F meter from Dr. Le Hung

Categories: My Projects
Tags: No Tags
Comments: No Comments
Published on: 20/12/2012

Some time ago I’ve got an old computer for free. Nothing happened when I tried to turn it on, so I assumed that the power supply is broken. It is a small IBM computer in a horizontal desktop case. It has a power supply integrated on motherboard. There are some [...]

Agat-7. Rev.0. CPU, memory and joystics

Tags: No Tags
Comments: No Comments
Published on: 03/10/2012

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 128Kb SRAM chip. We can use 128K x 8bit or 64K x 16bit chips. The second option requires 9 more [...]

Logic probe with sound indication

Categories: My Projects
Tags: No Tags
Comments: No Comments
Published on: 29/09/2012

I need a logic probe to troubleshoot some of my designs. I didn’t want to reinvent a wheel, so I checked the existing designs. I found that the design from talkingelectronics.com is most suitable for my needs. The main benefits of this design are sound indication and 3rd LED (for [...]

Agat-7. Rev.0. Floppy-drives emulators.

Tags: No Tags
Comments: No Comments
Published on: 17/08/2012

At the moment I’ve completed the schematics and I’ve started to work on PCB layout. There are going to be some changes caused by discovered mistakes or better layout. So, please, treat it as a draft on this stage. Please, let me know if you notice any mistakes. Today we [...]

Agat-7. Rev.0. Video output.

Tags: No Tags
Comments: No Comments
Published on: 01/08/2012

I’ve spend some time to debug STM32L based 140K “floppy-drive” for my “Agat-7” replica project. It is already perfectly workable in read only mode. I transferred it to SPI interface to save some FPGA pins and now I need only 5 pins instead of 12. For 840K floppy drive it [...]

HD44780-compartible LCD display and STM32.

Categories: Components, STM32
Tags: No Tags
Comments: No Comments
Published on: 27/06/2012

HD44780-compartible LCD digital-alphabetical displays are very convenient to use in hobby projects. They exist in different sizes and are quite cheap. The most popular are 2 line modules with 16 characters per line (16×2). Also, 8х2, 16х1, 20х2, 20х4 and 40х2 modules exist. For my “AGAT-7″ retro computer project I [...]

Recent Comments
Welcome , today is Friday, 25/07/2014