480x320 Debug LCD for 65816 System
To enable more verbose debug logging at runtime, I have added a higher-resolution LCD. Communication from the 65816 is handled with SPI....
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rehsd
- Jun 9, 2022
- 1 min
65816 - Cached sprites, a joystick, and Mario enters the scene.
I have been posting updates to 65816 Assembly Coding Series, but I know people may not catch updates to existing, running blog posts. The...
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rehsd
- May 30, 2022
- 1 min
65816 Sound Card Substantially Complete!
My sound card is now substantially complete, and I can continue working on system assembly code to better utilize it. I have the sound...
186 views0 comments
rehsd
- May 16, 2022
- 2 min
Creating New Music for My 65816 Sound Card
I was getting a bit tired of the previous song I had been using for my sound card testing. 1SMHARRIS suggested a song to try out next. In...
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rehsd
- May 14, 2022
- 2 min
65816 Sound Card: First Song Playback from SD Card (SPI) & Updated Output Schematic
I now have the onboard SD Card (SPI for communication) working on my sound card. I ended up going without the hardware shift registers...
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rehsd
- May 7, 2022
- 2 min
Arduino-controlled Programmable Sound Generator, with a Windows Interface
As I've been making some good progress on my sound card for my 65816 system (see /audio), I thought it would be good to start building...
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rehsd
- May 6, 2022
- 2 min
65816 Sound Card: First Song Playback from Onboard Media ROM
Continued from Sound Card 2.0 PCB Build (rehsdonline.com)... I now have playback working from the media ROM on the sound card....
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rehsd
- May 5, 2022
- 1 min
Eater 6502+PS2+VGA PCB - Building Your Own
Previously, I designed a PCB for my 6502, PS/2 keyboard, and VGA. The design is based on Ben Eater's video series. The only addition I...
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rehsd
- May 4, 2022
- 3 min
65816 Motherboard - Building Your Own
I have received several inquiries from others wondering about building their own version of my 65816 motherboard. If you're interested in...
446 views0 comments
rehsd
- Apr 30, 2022
- 1 min
Emulator^2 -- Sound Card Emulator
Continuing with my 65816 Emulator series, my 65816 PC build is now to the point where an emulator for my sound card would be helpful. I...
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rehsd
- Apr 28, 2022
- 2 min
Sound Card 2.0 PCB Build
In this running post, I will share the buildout of my sound card for my 65816 PC. Having the PCB in hand, I can say this will be the...
617 views0 comments
rehsd
- Apr 27, 2022
- 1 min
VIA Tester Add-in Card
I picked up a large batch of (likely used) VIAs on AliExpress. They were inexpensive ($1.64 USD per VIA), and I don't expect they will...
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rehsd
- Apr 27, 2022
- 1 min
Joystick Add-in Card
I ended up removing the joystick ports from my sound card design, since I would like to have the primary system processor handle joystick...
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rehsd
- Apr 24, 2022
- 2 min
65816 Assembly Coding Series
As I'm learning and implementing assembly code for my 65816 PC, I'll post periodic updates here. I'm doing OK with the assembly so far,...
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rehsd
- Apr 22, 2022
- 2 min
65816 PC Build Update (April 2022)
Back in January, I decided to start building a 65816 "PC." Up to that point, I had built a 6502 system with basic elements of a PC. The...
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rehsd
- Apr 21, 2022
- 1 min
USB Mouse Add-in Card for My 65816
I'm working with what I have... I have a 65816 computer, and I want a USB mouse. I have a 6502 computer with USB mouse support. I have...
210 views2 comments
rehsd
- Apr 20, 2022
- 2 min
Experimenting with Bus Resistors
As I have now found some nice stability with my 65816 system running at 14.16 MHz, I thought I would come back to bus resistors and see...
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rehsd
- Apr 20, 2022
- 1 min
Sprite Transparency
My first attempt at sprite transparency... and it's pretty rough. I updated my image conversion application to support converting images...
29 views2 comments
rehsd
- Apr 16, 2022
- 3 min
Sound Card 2.0: Breadboard Build (running post)
I am working on the breadboard build of my Sound Card 2.0. I'll use this post for updates on my progress. I figure the breadboard build...
183 views0 comments
rehsd
- Apr 15, 2022
- 1 min
ISA Slot Extension and Proto Board
To facilitate developing new circuits for my 65816 system, I have designed an extension for my bus, leveraging the ISA physical...
203 views0 comments
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