rehsd

At the end of January, I posted A Start to Video Output for My 65816, where I built a stackable dual-port SRAM PCB that could later be...

(Continued from 65816: VIA1 Working...) I updated my 65816 clock to 8 MHz. It seems to be taking it OK. :) 16 MHz oscillator into 7474...

Continued from VGA 2.0: First fire-up of the basic circuit... Here's my obligatory finch post: I can probably work on the resistor values...

I have fired up the basic circuit for my VGA 2.0 (320x240x1byte). I can't say it's pretty, but it's at least outputting something. Now,...

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

Continuing from A Start to Video Output for My 65816... I am working on the core circuit for my VGA card. I am targeting 320x240x1byte....

I was able to get VIA1 working today! I have it addressed at $108000 and have decode logic working for this part of the I/O range. I...

I've been a bit stuck for the last few weeks. See Troubleshooting 65816 ROM/RAM and Troubleshooting 65816 ROM/RAM, Part 2. Thanks again...

Earlier this month, I posted Troubleshooting 65816 ROM/RAM. I have updated that posting as I have had updates. Unfortunately, I have not...

In my 6502 system, I use VIAs, pin headers, and ribbon cables to connect expansion cards (e.g., my sound card). While this has worked...

Last year, I had completed my 8-bit CPU, based on Ben Eater's video series. At the end of this project, I added a couple of Arduinos --...

As I've been trying to get my 65816 running, I've built a breadboard version and a solderable prototype board version. Managing the...

Previously, I have been able to get ROM and RAM working together in my 65816 system, as seen here. However, I have had some sporadic...

Previously, I was able to get my 65816 working with ROM and basic RAM. Since then, I have moved my address decode logic from the...

For my "VGA 2.0" circuit, I am going to try and get 320x240x1byte running. To support this, I will be using three IDT7007 dual-port SRAM...

My address decode logic appears to be working (so far). I have a simple program running from flash ROM now. Bank 0 RAM now running. I...

Well, I have applied power. Magic smoke not detected. I haven't yet reviewed the monitored data to see if it matches what is expected at...

For my current 6502 build, I'm using Ben Eater's design for the memory map and glue logic. As I'm thinking about my 65816 build, I'm...

Starting in February, I'm going to take on a new challenge. I'm going to try and build a new system based on the W65C816S microprocessor....