Subject: Utility chip sio's on 4xx (more stories)
To: None <port-hp300@NetBSD.ORG>
From: Michael Smith <firstname.lastname@example.org>
Date: 03/19/1997 18:49:13
Well, I'm still pursuing this one. Some persistent reading of various
things leads me to this :
- There are 4 sio ports in the 'utility chip'.
0 : apollo keyboard port
1 : disabled in HP mode in favour of the onboard dca port
2 : goes to 232 port
3 : goes to 232 port
- The register model is that of the 8250, with 8-bits registers on
longword (32-bit) boundaries.
- There is a bytewide control register at 0x2021c0e0 which contains
control bits (interrupt enables perhaps?) for these ports, the 4
MSB correspond to the 4 ports.
I still haven't been able to find the absolute base address of the ports;
if someone with an HP/UX system can send me the /etc/master details for
the apci driver I'd be very grateful, as I think that's the key.
]] Mike Smith, Software Engineer email@example.com [[
]] Genesis Software firstname.lastname@example.org [[
]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[
]] realtime instrument control. (ph) +61-8-8267-3493 [[
]] Unix hardware collector. "Where are your PEZ?" The Tick [[