rehsd

I have the initial layout and routing working for my 65816 motherboard, video card (including memory daughter boards), and prototyping...

Continued from 65816: Driving VGA Through Dual-port SRAM... I made some progress today on my 65816 with VGA 2.0. Learned a bit about...

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...