6809 Assembly Language Programming on the TRS-80 Color Computer
(Using M.E.S.S. as the Vehicle)


By: Robert ([email protected])


It has been a VERY long time since I have done any assembly language programming on the CoCo. My last serious project was in 1993 or 1994 - It was an Assembly Language Program that allowed Color Computer users to save their graphics designs in ".MGE" format. It wasn't a very difficult program to create as that particular format was simply a Run Length Encoded type (RLE - not very efficient - it can actually increase the size of a file). Then, after a few years of absence from the CoCo (1998),  I received a letter from Harold J. Moenich, expressing a need for a simple program to allow his Speech-Sound Pak to speak Telewriter 128 files. I pulled out the old CoCo equipment and hashed together a quick assembly language program that linked into the PRINTER RAM-HOOK and thus, allowed all text destined for the printer to be spoken via the Speech/Sound Cartridge. Most all of my previous work including the above programs have long since vanished along with all of my CoCo equipment. I think it was all abducted by aliens, but Mulder wouldn't investigate. Regardless of what actually happened to all of my stuff, I have recently, via  eBay , re-acquired much of the CoCo stuff that I once owned. It is my desire to recreate, not only the above programs, but some entirely new software as well. As such, I will have to RE-LEARN THE 6809!


The above being the case, I thought I would allow the rest of the CoCo Community to join me in this journey. You will witness my mistakes, triumphs and general stupidity! Care to join me? If So, Then  CLICK HERE.

 
 

THE LINKS BELOW ARE FOR OTHER BITS OF INTERESTING INFORMATION PERTAINING TO THE COCO THAT I WILL ADD FROM TIME TO TIME, SO CHECK BACK OFTEN ;-)
 


 
 
 
 
 
 
 
 
 
 
 
 
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