SDOS (OS for 6800 and 6809)

[ColorComputerStore]

Was chatting with Ira Baxter, who wrote SDOS... and early OS for the 6800 and 6809 machines. He said that his sources were all on a hard drive that crashed and he hasn't gotten around to trying to restore the hard drive.

The manuals for SDOS is on bitsavers... but no disks..
He did say he donated a full Jupiter system way back to the SF Vintage Computer club.

Anyways, trying to locate the disks.

Thanks

Carlos

 

[nikola-wan]

Was chatting with Ira Baxter, who wrote SDOS... and early OS for the 6800 and 6809 machines. He said that his sources were all on a hard drive that crashed and he hasn't gotten around to trying to restore the hard drive.

The manuals for SDOS is on bitsavers... but no disks..
He did say he donated a full Jupiter system way back to the SF Vintage Computer club.

Anyways, trying to locate the disks.

Thanks

Carlos

Carlos,

Sorry to revive this old thread - but I found lots of SDOS disks on bitsavers here: https://bitsavers.org/bits/SoftwareDynamics/
it also has file listings for each disk and extracted files in addition to the entire disk!

Now I need to find a way to run the SD Assembler to convert 6809 source code to run on a 6800 - as described in the SD 6800/6809 Assembler v1.4 manual posted in the pdf section of bitsavers.org.

I don't have a CoCo - or SWTPC to run the disks

I'm trying to convert some Vectrex 6809 games to work on my Tektronix 4052 and 4054 vector graphics computers from 1979.

 

[nikola-wan]

I found a simulator that will run those Software Dynamics SDOS disks - emulating the SWTPC with 6800 CPU here:
https://github.com/rsanchovilla/SimH_cpanel

Using this video of running SDOS on the SWTPC I duplicated the Hello World assembly program and assembled it and successfully ran it with the simulator!
https://www.youtube.com/watch?v=8laYFP3ZbcQ

Of course the system calls are for SDOS - but I will be able to convert them to ROM calls for my Tektronix 4054A computer - since all the ROM Calls are documented in the Tektronix 4052/4054 assembler doc.

Next step is to select a simple Vectrex program with 6809 source code to try to convert to run on my Tektronix 4054A!
I've got a little work to do to use the right SD 6809 assembler that targets the 6800 - but this is already considerable progress.

 

[ColorComputerStore]

Thanks for the link.