Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Interested in Tandy 1000 disassembly. Which ROM version? #1

Open
migry opened this issue Aug 15, 2021 · 0 comments
Open

Interested in Tandy 1000 disassembly. Which ROM version? #1

migry opened this issue Aug 15, 2021 · 0 comments

Comments

@migry
Copy link

migry commented Aug 15, 2021

I am working on a project using a real 8088 connected to an Arduino Mega which runs the CPU in single step. The basic functionality is now working. I added the Tandy 1000 ROM (V01.01.00). I am able to single step and in the serial monitor (TeraTerm) I can see all CPU instructions reads, memory and IO write and reads in a human readable manner. Since I do not yet emulate the video memory I get an error message written to video RAM (which I can extract using grep for video addresses, 0xB8XXX). Your disassembly has been most helpful, but I can see that my code is not quite the same version as your code.
Can you please confirm which version of the Tandy 1000 ROM you have disassembled please?
The website "Retrograde Station" has other versions, but I thought it best to start with the original.
The final goal is to make a PCB of the 8088, which just like the Tandy 1000, does not include the DMA controller. This was found out by accident, but I am hoping to run the Tandy BIOS given that my hardware should be compatible.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant