On Oct 17, 2007, at 4:59 PM, Skip Robinson wrote:
This was definitely about 3800 device support. Historically JES2 had
controlled a slew of peripheral devices: printers, punches, TP,
RJE, NJE.
The code to handle I/O to these devices was included in JES2
modules. The
3800 was a logical candidate but a most unfortunate one. The 3800
was far
more complex than any devices previously managed. As a brand new
device, it
was also undergoing development and refinement. Every quirk and
tweak had
to be handled by JES2 code. It was a quagmire.
As a consequence of that experience, FSS was born. From that point
forward,
device support was externalized via a standard interface so that
JES2 code
would never again have to confront the innards and foibles of new
hardware.
In the interim, customers who suffered unstable JES2 would run a
secondary
JES2 to take the hit for 3800 hiccups.
.
Skip,
Thanks for taking the brunt of the pain of the 3800.
Ed
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