MC6809-Based Arcade Game

Details

The board is designed to use either an MC6809 (on-chip clock generator) or MC6809E (external clock generator). This works because I don't require any of the functionality that differs between the two versions (DMA~BUSY, MRDY~AVMA, TSC, LIC). Switching between the two types requires configuring a jumper and including or eliminating one IC.

Display is 16 lines x 32 characters, using an 8 x 8 grid for each character. Fonts are contained in a 2732A EPROM, so can be changed and custom characters added.

Files

Schematics.pdf

Arcade Game Schematics

Adobe Portable Document Format - 490.34 kB - 04/20/2020 at 14:18

Preview

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code listing.pdf

Source code (in assembly language) of arcade game.

Adobe Portable Document Format - 1.07 MB - 06/28/2019 at 17:25

Preview

Download

Components

1 × MC6809 Microprocessors, Microcontrollers, DSPs / Microprocessors (MPUs)

1 × MC6821 Microprocessors, Microcontrollers, DSPs / IO Controllers

1 × 74LS04 Electronic Components / Misc. Electronic Components

1 × 74LS279 Electronic Components / Misc. Electronic Components

1 × 7404 Electronic Components / Misc. Electronic Components

Project Logs

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Sound Fixed!
Steve Toner • 09/01/2019 at 00:50 • 0 comments
Audio Failure Investigation
Steve Toner • 08/14/2019 at 19:40 • 0 comments

The CRT monitor's audio output failed at VCF West. Tracking down the cause and trying to come up with a solution:
VCF Debrief
Steve Toner • 08/14/2019 at 19:36 • 0 comments

VCF Debrief:
Code Listing
Steve Toner • 06/28/2019 at 19:32 • 0 comments

Added source code listing: https://cdn.hackaday.io/files/1637817007206304/code%20listing.pdf
It's all in one file because the version of as9 that I have apparently does not support the INCLUDE directive...
Timer Schematic
Steve Toner • 06/22/2019 at 20:36 • 0 comments

Interfacing the Intel 8253 timer to the MC6809 CPU, using a 74LS31 delay element to get the signal timing right...
I/O Schematic
Steve Toner • 06/10/2019 at 20:57 • 0 comments

Trying to get caught up here. Still need to update & post the Timer schematic... This is the I/O decode & parallel port page.
Sound Card Schematic
Steve Toner • 05/06/2019 at 16:44 • 0 comments
Sound Added!
Steve Toner • 05/05/2019 at 00:32 • 0 comments
Making Progress
Steve Toner • 04/03/2019 at 21:28 • 0 comments

Buttons and coin acceptor now operating...
Video Output Schematic
Steve Toner • 04/03/2019 at 20:09 • 0 comments

This is the video output section, providing monochrome NTSC composite video:

Based on the TVT 6 5/8 design presented in The Cheap Video Cookbook by Don Lancaster, but see notes for changes I made to make it work properly.

View all 15 project logs

Discussions

wolven wrote 12/22/2021 at 01:49

You are doing great job to make the fonts changing scripts program. I want to test it for my website.

Are you sure? yes | no

df6809 wrote 07/03/2019 at 11:49

Really cool project! I want to try this on my sbc, please can you also provide the data for the font rom?

Are you sure? yes | no

Steve Toner wrote 02/12/2019 at 17:33

I'll put everything up once it's finalized. I'm not sure it'll have very wide appeal, as some of the parts (e.g., Cypress Semi memory chips) are rather obscure and hard to find. As for PCB layout, well, I may not provide that as the current boards I've had made have some flaws (e.g., the sound chip is going to require a daughter board) but are usable for a one-off build. If I update the PCB layout it'll be untested (unless I absolutely have to do a second run to make it work rather than just hacking the current boards).

Are you sure? yes | no

fredmatic1 wrote 02/12/2019 at 08:36

Will you be releasing the board layout/software? I am interested in duplicating. I was a developer of SBC's back in the early 80's using the 6809E..... and nostalgia is pushing me to get re-interested in the 6809.

Are you sure? yes | no

MC6809-Based Arcade Game

Description

Details

Files

Schematics.pdf

code listing.pdf

Components

Project Logs

Collapse

Sound Fixed!

Audio Failure Investigation

VCF Debrief

Code Listing

Timer Schematic

I/O Schematic

Sound Card Schematic

Sound Added!

Making Progress

Video Output Schematic

Discussions

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MC6809-Based Arcade Game

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