FPGA

Jun 24, 2022
6 min

Building a 16-bit CPU on an Arty Z7-20

I am hoping to learn more about processors by building a 16-bit processor. I previously built an 8-bit processor based on Ben Eater's...

282 views2 comments

Using GAL22V10 Programmable Logic Devices

rehsd

Mar 4, 2022
4 min

Software

Using GAL22V10 Programmable Logic Devices

I have recently started using programmable logic devices (PLDs) in some of my projects. Below are the steps I am using, along with some...

545 views2 comments

rehsd

Dec 21, 2021
3 min

FPGA

FPGA VGA for 6502 : First Run

I've made some decent progress getting my FPGA VGA working on my 6502 system. My goal is to have a "smart display" to replace the current...

598 views0 comments

Cmod A7 FPGA : Video Test Pattern Generator

rehsd

Dec 19, 2021
1 min

FPGA

Cmod A7 FPGA : Video Test Pattern Generator

Below is the configuration I used to get the Xilinx Video Test Pattern Generator (TPG) working on a Digilent Cmod A7 FPGA. This is based...

181 views7 comments

rehsd

Dec 18, 2021
2 min

FPGA

VGA from Cmod A7 Working

Update: I have it working. See postscript at the bottom of this post. I am attempting to get the Arty Pmod VGA Demo running on a Digilent...

202 views0 comments

rehsd

Dec 18, 2021
1 min

6502

Prepping My 6502 System for FPGA VGA

I made some updates to my 6502 system to get it ready for my FPGA VGA. Previously, my USB mouse took ten VIA pins (a bit of laziness on...

150 views0 comments

rehsd

Dec 15, 2021
2 min

FPGA

FPGA VGA for 6502 System - Initial Prototyping

I am currently working on building an improved VGA circuit for my 6502 build. My goal is to offload the video processing and have better...

161 views0 comments

rehsd

Dec 14, 2021
5 min

FPGA

Arty VGA Walkthrough

If you are looking to add the VGA Pmod to your Arty A7 and control output from MicroBlaze, the following are the steps I have taken to...

708 views0 comments

rehsd

Dec 11, 2021
1 min

FPGA

Arty VGA Output from MicroBlaze

Continuing from my post FPGA VGA for 6502: Brainstorming... I am trying to find a decent solution to control VGA output from MicroBlaze....

79 views0 comments

rehsd

Dec 9, 2021
3 min

FPGA

FPGA VGA for 6502: Brainstorming

I am currently brainstorming ways to add an FPGA-based VGA circuit to one of my 6502 builds. And... I have questions. :) As part of my...

233 views0 comments

rehsd

Dec 7, 2021
1 min

FPGA

VHDL 8-bit CPU - Runtime RAM Updates

I have added UART support to my VHDL 8-bit CPU, along with a Windows application that allows retrieving and setting RAM values at...

232 views0 comments

rehsd

Nov 30, 2021
2 min

FPGA

Troubleshooting a MicroBlaze UART

I am trying to determine why I am unable to communicate out through a UART on my Arty A7-100T. Any suggestions on how to troubleshoot...

105 views0 comments

VHDL 8-Bit CPU (Ben Eater edition) Working!

rehsd

Nov 27, 2021
2 min

FPGA

VHDL 8-Bit CPU (Ben Eater edition) Working!

As a continuation of FPGA VHDL Implementation of Ben Eater's 8-bit CPU - Progress Update, here's another update on my 8-bit CPU in VHDL...

339 views0 comments

rehsd

Nov 20, 2021
1 min

FPGA

FPGA VHDL Implementation of Ben Eater's 8-bit CPU - Progress Update

I've been working on a VHDL implementation of Ben Eater's 8-bit CPU. I have VHDL modules built for the clock, registers, bus, RAM, ROM,...

85 views0 comments

rehsd

Nov 17, 2021
2 min

FPGA

Connecting VHDL to MicroBlaze

Continuing my project of building Ben Eater's 8-bit CPU on an FPGA, I created the clock module in VHDL. I connected that VHDL to a...

129 views0 comments

rehsd

Nov 11, 2021
4 min

FPGA

Arty A7 & OLEDrgb Pmod Walkthrough

My first attempt at getting Digilent's OLEDrgb Pmod working with an Arty A7 was unsuccessful. After a fair amount of troubleshooting and...

394 views0 comments

rehsd

Nov 9, 2021
3 min

FPGA

Arty A7 & OLEDrgb Pmod Struggles

Update: I have the OLEDrgb display working! See bottom of post. Original Post First things first... I am new to FPGA development. I am...

222 views0 comments

Caution: Steep Learning Curve Ahead (for me)

rehsd

Oct 23, 2021
2 min

FPGA

Caution: Steep Learning Curve Ahead (for me)

For a while now, I've wanted to dig into field-programmable gate arrays (FPGAs). Today, u/Enlightenment777 provided the kick I needed to...

66 views0 comments