To Disable Parity For A 66 Mhz Bus; To Disable Parity For An Ultra 450 System - Planar DOME Md4/PCX Installation Manual

Installing the Md4/PCX Board and Driver in a Sun PCI Workstation

To disable parity for a 66 MHz bus

The command to turn off the 66 MHz bus is similar to that
for the 33 MHz bus.
At the ok> prompt, type:
00 1fe.0180.0004 1d spacew!
This command disables parity on the 66 MHz PCI bus.
To make parity stay off when you turn off power to the
computer, put this command in the nvram and edit the
/etc/system
33 MHz bus" on page 72.

To disable parity for an Ultra 450 system

The Ultra 450 has six bridges: three 5-volt, 33 MHz, and
three 3.3-volt, 33 or 66 MHz. This procedure disables parity
checking on all the buses. To disable parity on individual
buses, follow the instructions in "To disable parity for a 33
MHz bus" on page 72 and To disable parity for a 66 MHz
bus on page 73.
1. Power on or halt the system to get to the ok> prompt
before you install the Md4/PCX board.
2. Type these lines to shut off the parity during initial
boot; observe all spaces:
ok>
0: 00 1fe.0100.0004 1d spacew!
1: 00 1fe.0180.0004 1d spacew!
2: : parity-off-bc
3: 00 1c8.0100.0004 1d spacew!
4: 00 1c8.0180.0004 1d spacew!
5: 00 1cc.0100.0004 1d spacew!
6: 00 1cc.0180.0004 1d spacew!
7: ;
8: : probe-io-patch parity-off-bc probe-io ;
9: patch probe-io-patch probe-io probe-all
10: ^C
file, as described in "To disable parity for a
nvedit
73