Brainstorming: 65816 'Motherboard'
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...
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rehsd
- Feb 17, 2022
- 4 min
Walkthrough: PC Interface for Eater 8-bit CPU
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 --...
436 views2 comments
rehsd
- Feb 9, 2022
- 1 min
65816 (or 6502) Proto Board
As I've been trying to get my 65816 running, I've built a breadboard version and a solderable prototype board version. Managing the...
135 views2 comments
rehsd
- Feb 5, 2022
- 5 min
Troubleshooting 65816 ROM/RAM
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...
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rehsd
- Jan 31, 2022
- 1 min
65816 Build Update: Moving to Solderable Prototype Boards for the "Core"
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...
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rehsd
- Jan 31, 2022
- 1 min
A Start to Video Output for My 65816
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...
200 views1 comment
rehsd
- Jan 26, 2022
- 1 min
65816 Build: First Code (ROM Running). Bank 0 RAM Working.
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...
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rehsd
- Jan 23, 2022
- 1 min
65816 First Fire Up - No Magic Smoke
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...
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rehsd
- Jan 22, 2022
- 2 min
Researching memory map and decode logic for my 65816 build
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...
204 views2 comments
rehsd
- Jan 15, 2022
- 1 min
Starting something new in February: W65C816S build
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....
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rehsd
- Jan 9, 2022
- 3 min
Refactoring Music Playback
In my post Working on game music... need storage, I had started building game music and ran out of EEPROM space to store the music. Also,...
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rehsd
- Jan 4, 2022
- 6 min
Calling All SPI SD Card Wizards: Troubleshooting SD Card Access with SPI
Full data reading is now working! Progress Updates posted at the bottom... I am currently trying to get an SD Card reader working with my...
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rehsd
- Jan 2, 2022
- 2 min
Working on game music... need storage.
I started working on some music for my game. In this video, I am using the sound card that I built for my 6502 system. All sound is being...
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rehsd
- Dec 30, 2021
- 1 min
Dots connected... Retro gaming started...
I've finally been able to bring together many of the components of my 6502 system to support a retro-style game. The game will be a...
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rehsd
- Dec 30, 2021
- 3 min
My Frankensteined 6502 - Five Months In
Over the past five months, I have built a few 6502 computers, starting with Ben Eater's 6502 kit. See My 6502+... a little background....
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rehsd
- Dec 24, 2021
- 1 min
Enough Pieces to Build a Game?
I believe I have enough functionality in my 6502 system now to take a run at developing a retro-style game. So far, I have built support...
102 views1 comment
rehsd
- Dec 21, 2021
- 3 min
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...
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rehsd
- Dec 19, 2021
- 1 min
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...
169 views7 comments
rehsd
- Dec 18, 2021
- 2 min
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...
191 views0 comments
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