Yes it was the UCC days.  Like others have said.  Was a way to run DOS programs 
under MVS with out many changes.  As others have said a company I worked for 
used as part of a DOS to MVS migration.  That was a long time ago.


Paul Feller
GTS Mainframe Technical Support

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Steve Thompson
Sent: Tuesday, March 29, 2022 1:47 PM
To: [email protected]
Subject: Re: CA-DUO [EXTERNAL]

Hi level: It allowed certain DOS core image library programs to execute in an 
MVS environment. It used SVC intercept to make it all work.

Last time I used it, was 1981, if I remember correctly, for a restaurant chain 
that had been trying to migrate from DOS to MVS. 
So part of their payroll was running under DOS, another part was under DUO 
(-360), and the rest was native MVS.

I can't remember if that was about the time of UCC-2 or before. 
Definitely before CA.

Anyhow, I don't know if CA kept the product up or not. I'm suspecting they 
didn't.

Regards,
Steve Thompson


On 3/29/22 14:21, Carl Edwards wrote:
> Anyone know anything about CA-DUO? Is it still available, supported?
>
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