Game:

Ultima IV: Quest of the Avatar (1985)

Category:

Vlog

Duration: 8:02

3,622 views

147

In this episode, I share with you the latest progress of my hobby engineering project: building a custom computer that can run Ultima IV, one of the classic games for the Apple II. I will show you how I designed and implemented the logic circuits that emulate the Apple II’s features, such as soft switches, ROM banking, color graphics, and Mockingboard, using various tools and techniques. I will also demonstrate how I adapted the game to run on my computer, using a custom DOS and some clever hacks. Along the way, I will share with you some of the challenges and solutions I encountered during the debugging process, using an oscilloscope, a multimeter, a logic analyzer, and a lot of patience. Finally, I will tell you about my future plans for the project, such as building a custom video chip, designing the PCB, and porting the game to a smaller version of the computer that uses a Raspberry Pi Pico. How will this affect the performance and compatibility of the game? Will this make my computer a Commander X16 killer? Watch the video to find out!

U4RemasteredA2
Main Github Repo: https://github.com/sean-gugler/u4remasteredA2
My fork: https://github.com/ebadger/u4remasteredA2
All changes are in the branch "fixed"

6502 SD, FAT AND DOS
github: https://github.com/gfoot/sdcard6502
This is George's original github repo
LiamInventions has added in this fork: https://github.com/liaminventions/sdcard6502
My changes are part of a fork of the MS Basic at this github: https://github.com/ebadger/msbasic
My fork also includes: My DOS, support for PS/2 decoding using 2 pins on a VIA, and more.

@rumblethumps5786 PICO Computer: https://www.youtube.com/@rumbledethumps - Was great seeing you at the PRGE!

@TroySchrapel has built a PICO version of his HBC-65 computer: https://www.youtube.com/@UCH3DwTmI83YVAOIrTQYr-gg - Looking forward to checking out your AY-3-8910 emulation.

@Fifty1Ford Check out the videos - https://www.youtube.com/@Fifty1Ford - I think you must be making the most of the Worst VGA card in the Ben Eater demo scene

@rehsd https://www.youtube.com/@rehsd - You've got to be the closest to running DOOM

@BenEater video series are an excellent and accessible resource for learning:

Eater 6502 kit:
http://eater.net

r/beneater Reddit community:
https://www.reddit.com/r/beneater/

Follow me on X: https://twitter.com/ebad73

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