On 11/27/2017 11:52 AM, John McKown wrote:
Well, I don't do much basic I/O, so maybe I'm confused. But doesn't an AMODE(31) program require more work than AMODE(24) or maybe I'm thinking RMODE(31)? Or is that just for QSAM program (DCBE and so forth)?
Back in the day, you had to be in 24-bit mode to call the services, so everyone had to write so-called "glue" routines.
The only restriction these days I can think of is that the DCB must reside below 16MB (virtual). That's because the DCB pointer in the DEB is only three bytes long.
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