Asset ID:	1-71-1010645.1
Update Date:	2011-01-04
Keywords:

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Solution Type  Technical Instruction Sure

Solution  1010645.1 :   Serial devices requiring RS-232 may cause a hang if the serial ports are not configured accordingly  


PreviouslyPublishedAs
214677

Description
To configure the serial ports for RS-232, some older Sun[TM] workstations and desktops need jumpers to be set on the system board. Many Sun CPU serial ports can be configured as either RS-232 (+/- 12V) or RS-423 (+/- 5V), defaults vary. See the hardware documentation for your machine to locate the jumper to configure this, if it exists. Most implementations do not have to worry about the voltage on the serial port.

Steps to Follow
To configure the serial ports for RS-232, some older Sun workstations and
desktops need jumpers to be set on the system board, while newer systems
can be configured without jumper settings from the OpenBoot[TM] PROM (OBP). See
system specific details in the following matrix:

System          Jumper Name     RS-232 setting  default jumper setting
Ultra 5/10      JP3, JP4        1-2 IN          2-3 IN (RS-423)
Ultra 30        J2604, J2605    1-2 IN          2-3 IN (RS-423)
Ultra 60        J2604, J2605    1-2 IN          2-3 IN (RS-423)
Ultra 80        J2804, J2805    1-2 IN          2-3 IN (RS-423)
Sunblade 150*       -           from OBP          -
Sunblade 1000*      -           from OBP          -
Sunblade 2000*      -           from OBP          -
* No jumper settings are required. To configure the serial ports for
RS-232, bring the system to the OBP and do:
ok setenv ttya-mode 9600,8,n,1,-,rs232
ok setenv ttyb-mode 9600,8,n,1,-,rs232
ok reset-all
Please contact the manufacturer of the device for details on compatibility
and special requirements on the serial port.

Product
Ultra 30 Workstation
Ultra 80 Workstation
Ultra 60 Workstation
Ultra 2 Workstation
Ultra 1 Workstation
Sun Blade 1000 Workstation
Sun Blade 2000 Workstation
Sun Blade 150 Workstation
Ultra 10 Workstation
Ultra 5 Workstation

Internal Comments
The hint to use RS-232 (+/- 12V) instead of RS-423 (+/- 5V) when connecting a "SpaceBall 4000" was taken from 3dconnexion install guide (http://www.3dconnexion.com).

RS-232, rs232, RS-423, rs423, ttya-mode, jumper, voltage, serial, spaceball, CAD
Previously Published As
70185

Change History
Date: 2010-12-31
User name: Dencho Kojucharov
Action: Currency check
Comments: audited by Entry-Level SPARC Content Lead

Date: 2005-06-23
User Name: 71396
Action: Approved
Comment: Publishing.
Version: 9
Date: 2005-06-22
User Name: 121432
Action: Approved
Comment: The systems have been added to the list. Forwarded on for publishing.
Version: 0

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