Building a 16-bit CPU on an Arty Z7-20
I am hoping to learn more about processors by building a 16-bit processor. I previously built an 8-bit processor based on Ben Eater's...
Search
rehsd
- Jun 22
- 2 min
16-Bit Processor (Step 1: Approach to Bus and Modules)
I have previously built an 8-bit processor (my 8-bit) using Ben Eater's video series. Since then, I have been spending time on 6502 and...
105 views0 comments
rehsd
- Jun 20
- 1 min
Eater 8-bit CPU Emulator for my 65816 System
To practice my 65816 assembly, and refresh myself on Ben's 8-bit CPU... And an emulator running inside an emulator... 🙂 On my Windows...
22 views0 comments
rehsd
- Jun 17
- 2 min
65816 System - June 2022 General Update
In January of this year, I decided to try to build a new system based on the 65816 processor. It has now been almost five months, and I...
41 views0 comments
rehsd
- Jun 13
- 1 min
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....
153 views0 comments
rehsd
- Jun 9
- 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...
9 views0 comments
rehsd
- May 30
- 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...
98 views0 comments
rehsd
- May 17
- 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...
50 views0 comments
rehsd
- May 14
- 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...
78 views0 comments
rehsd
- May 7
- 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...
390 views0 comments
rehsd
- May 6
- 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....
32 views0 comments
rehsd
- May 5
- 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...
179 views0 comments
rehsd
- May 4
- 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...
286 views0 comments
rehsd
- Apr 30
- 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...
23 views0 comments
rehsd
- Apr 29
- 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...
588 views0 comments
rehsd
- Apr 28
- 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...
20 views0 comments
rehsd
- Apr 28
- 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...
29 views0 comments
rehsd
- Apr 24
- 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,...
143 views0 comments
rehsd
- Apr 22
- 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...
247 views0 comments