Electronics > Projects, Designs, and Technical Stuff

Cloning a Tandy TRS-80 Model 1

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Rick-S:
GK,

Any updates on this project or did it get put on the back burner for now?  I'm just curious.

GK:
Sorry for the lack of updates - I've just been too busy with too many other things or not particularly motivated & only just got back onto the electronics bench again the other day. I have the breadboard prototype disassembled now and a couple of boards are out for production. Maybe some proper progress again in a week or two.





--- Quote from: b1ackmai1er on March 10, 2019, 05:27:30 am ---Hi GK,

I came across your TRS-80 Model I development post in my search for a graphics font. Impressive work indeed.

I was wondering if you would be able to share a copy of the graphics character "rom". I saw you posted a hex file of the standard character set but you advised that the graphics character set is "generated". Would you still be able to do a dump of this character set and share it? Alternatively, if thise is generated by Z80 code, would you mind sharing the code?

I have found heaps of trs-80 font resources on the net but they are all font conversions to ttf or similiar. It's seems nearly impossible to get these back to a bit map rom.

Thanks for your time.

I'm chasing these to add a graphics character set for 128 to 256 character modification:

https://www.retrobrewcomputers.org/doku.php?id=boards:ecb:vdu:start
https://www.retrobrewcomputers.org/doku.php?id=boards:ecb:vdu:fonts

Regards Phillip

--- End quote ---


Not sure if you're still tuning in, or if the file is really of much use to you, but attached is the graphics character section of the character ROM binary file, as described way back in reply #15. It's a .bin file but I had to relabel it .txt so that the forum would let me upload it.

Rick-S:

--- Quote from: GK on June 10, 2019, 12:35:06 am ---Sorry for the lack of updates - I've just been too busy with too many other things or not particularly motivated & only just got back onto the electronics bench again the other day. I have the breadboard prototype disassembled now and a couple of boards are out for production. Maybe some proper progress again in a week or two.

--- End quote ---

No problem, I fully understand how interest shifts from one thing to another.   Will you make the boards or board files available once you have them proven out?   Thank you for the update, and looking forward to seeing your production boards up and running.

GK:
The intent is to publish the project and all of the Gerber files, ROM images, etc, on my website as I did with my PET2001 clone. That alone is for the most part a thankless enough endeavor and I'm not going to be supplying actual boards or any form of kit.
 

Rick-S:
That is great.  I am excited to know you will make the files available.  Thank you so much for all your endeavors to promote this hobby and to revive these old machines with a modern build.

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