Sprite Transparency
My first attempt at sprite transparency... and it's pretty rough. I updated my image conversion application to support converting images...
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rehsd
Apr 16, 20223 min read
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...
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rehsd
Apr 15, 20221 min read
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...
496 views0 comments
rehsd
Apr 15, 20221 min read
LCD Add-In Card
With my 65816 system up and running, I can now start working on add-in cards. A simple one to start: an LCD. I designed the PCB to be...
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rehsd
Apr 13, 20224 min read
65816: Working to Improve Speeds
Now that I have my 65816 motherboard working, I would like to improve speeds. The symptom that I see (and would like to improve) is that...
351 views2 comments
rehsd
Apr 9, 20225 min read
Sound Card 2.0 for 65816 PC (maybe a little overboard, but I'm OK with that)
I'm getting close to having my 65816 PC updated with rev 1.1 PCBs (for the motherboard and video memory card). I have a plan for a USB...
590 views4 comments
rehsd
Apr 9, 20221 min read
65816+VGA: First Moving Sprite
Continued from VGA for 65816: First Run at Moving Content... My first animated sprite (32x32) on my 65816+VGA system! While the video...
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rehsd
Apr 7, 20221 min read
VGA for 65816: First Run at Moving Content
So much room for improvement, but it's a start to moving content... The 65816 is running at 5 MHz for this test.
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rehsd
Apr 7, 20222 min read
VGA for 65816: Start of Color Calibration
As I am working on my VGA card build, the next step for me is to improve the accuracy of the color output -- well, as accurate as I can...
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rehsd
Mar 31, 20224 min read
VGA Add-in Card for My 65816 PC
I have started the assembly of my VGA card for my 65816 PC. In this running post, I will share my updates as I work through assembly,...
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rehsd
Mar 14, 20223 min read
Building a 65816 Emulator
(Latest video posted at the bottom.) While I'm waiting for my 65816 system PCBs to come in, I thought I would see how far I can get with...
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rehsd
Mar 14, 20225 min read
65816 PC Build - Lessons Learned (running post)
I will update this post as I work on my 65816 PC and identify mistakes in my 65816-related PCBs, so check back to see how they all pile...
794 views1 comment
rehsd
Mar 12, 20223 min read
65816 "PC" PCB Progress
I have the initial layout and routing working for my 65816 motherboard, video card (including memory daughter boards), and prototyping...
448 views15 comments
rehsd
Mar 10, 20221 min read
65816+VGA Progress Update
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...
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rehsd
Mar 9, 20223 min read
65816: Driving VGA Through Dual-port SRAM
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...
296 views2 comments
rehsd
Mar 7, 20221 min read
65816 Now Running at 8 MHz
(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...
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rehsd
Mar 7, 20221 min read
The Obligatory Gouldian Finch Post
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...
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rehsd
Mar 6, 20223 min read
VGA 2.0: First fire-up of the basic circuit -- it's not pretty :)
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,...
257 views0 comments
rehsd
Mar 4, 20224 min read
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...
869 views2 comments
rehsd
Mar 3, 20221 min read
VGA Card for 65816 PC - Step 1: Basic Circuit
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....
274 views2 comments
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