18 Jul
2015
18 Jul
'15
11:26 p.m.
On Wed, Jul 15, 2015 at 7:05 AM, Jay Jaeger <cube1 at charter.net> wrote:
...though I have not actually checked. The B5000 had
IO processors as well.
Not quite, the B5000 and B5500 arguably had DMA channels (up to 4 of
them), but not independent IO processors (with their own machine code)
that were seen on the later follow-on B6500 family (B6700, B7700) with
the DCP (which had an associated definition language NDL).
B6500 peripherals (like Datacomm) were back-ported to the B5700 (a
re-badged B5500 with optional B6500 peripherals) seemingly as a
stop-gap due to delays in delivering the B6500.