On 17.01.2023 14:01, Louis Ohland wrote:
MAJ Tom, in one of your transmissions before you left with the children
of the Sun, you said the 90 has the CP Code addresses. Now, whether this
is a planar -OR- complex hardware supported thing, I dunno. Probably
complex.
Figure 1-2. System Board I/O Address Map page 14
0108 — 010F Information Panel
Well, the 90 and 95 share the same POST/BIOS code, so they both send the
codes. But the decode logic, xceivers and of course, the physical
interface is on the planar and only on the 95 one. So, when installed in
the Model 90 the complex is talking but nobody is listening (on ports 108-10Fh).
The Japanese 5560 planar has the decode logic and a provision for the
connector and the xceiver, but they are not populated normally (similar
to the 85 K/N planar):
https://www.ardent-tool.com/PS55/5560/#Op_Panel_Connector https://www.ardent-tool.com/85_95/Op_Panel_9585_KN.html
As you proposed, the DBA connector would be a nice hookup point for the
display decode logic.
There is no Op Panel-related logic on the complex, if we ignore the
completely independent SDL iface on the T4 boards.
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