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    Using GAL22V10 Programmable Logic Devices
    rehsd
    • Mar 4
    • 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...
    256 views2 comments
    FPGA VGA for 6502 : First Run
    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...
    495 views0 comments
    Cmod A7 FPGA : Video Test Pattern Generator
    rehsd
    • Dec 20, 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...
    119 views7 comments
    VGA from Cmod A7 Working
    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...
    113 views0 comments
    Prepping My 6502 System for FPGA VGA
    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...
    132 views0 comments
    FPGA VGA for 6502 System - Initial Prototyping
    rehsd
    • Dec 16, 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...
    133 views0 comments
    Arty VGA Walkthrough
    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...
    326 views0 comments
    Arty VGA Output from MicroBlaze
    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....
    34 views0 comments
    FPGA VGA for 6502: Brainstorming
    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...
    127 views0 comments
    VHDL 8-bit CPU - Runtime RAM Updates
    rehsd
    • Dec 8, 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...
    136 views0 comments
    Troubleshooting a MicroBlaze UART
    rehsd
    • Dec 1, 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...
    71 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...
    245 views0 comments
    FPGA VHDL Implementation of Ben Eater's 8-bit CPU - Progress Update
    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,...
    52 views0 comments
    Connecting VHDL to MicroBlaze
    rehsd
    • Nov 18, 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...
    104 views0 comments
    Arty A7 & OLEDrgb Pmod Walkthrough
    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...
    179 views0 comments
    Arty A7 & OLEDrgb Pmod Struggles
    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...
    111 views0 comments
    Caution: Steep Learning Curve Ahead (for me)
    rehsd
    • Oct 24, 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...
    38 views0 comments

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