Hardware Release Notes
6.10 ATI RADEON 7500 Graphics
Specifies the number of clock ticks that are allowed to elapse before a timeout
occurs and the DECwindows server seizes control of the RADEON card.
The default values are chosen to minimize the impact of the timer on the
performance of graphics applications. If you want to reduce the length of time
before the DECwindows server begins responding again, you can do so by
decreasing the value of DECW$DRM_TIMER_PERIOD.
A process can be interrupted while holding the hardware lock under either of the
following conditions:
• The process is remotely logged in with its terminal displayed on a different
system.
• The process is a subprocess that has been suspended or terminated by
another process in such a way that normal exit handling does not occur.
If neither of these conditions is likely to occur in your configuration, you can
disable the timer mechanism entirely by setting the timer period to zero:
$ DEFINE/SYSTEM DECW$DRM_TIMER_PERIOD 0
Whenever you change the value of DECW$DRM_TIMER_PERIOD, you must
either restart the DECwindows server or reboot the system for the changes to
take effect. To restart the DECwindows server, use the following command:
$ @SYS$STARTUP:DECW$STARTUP RESTART
6.11 DECwindows X11 Display Server (Alpha Only)
This section contains release notes pertaining to the DECwindows X11 display
server for OpenVMS Alpha systems.
6.11.1 S3 Multihead Graphics
Permanent Restriction
Alpha computers equipped with S3 Trio32 or Trio64 graphics cards support
single-screen display only. Multihead graphics are not supported.
6.12 DIGITAL Modular Computing Components (DMCC)
This section contains release notes pertaining to DMCC.
6.12.1 Alpha 5/366 and 5/433 PICMG SBC Restriction
Permanent Restriction
The KZPDA SCSI Controller and the PBXGA Graphics Card cannot be placed
in a slot behind the bridge on the DIGITAL Modular Computing Components
(DMCC) Alpha 5/366 and 5/433 PICMG SBCs.
6.12.2 Updating the SRM Console
Permanent Restriction
To update the SRM console on the Alpha 4/233 (21064a), 4/266 (21164a), 5/366,
and 5/433 DMCC systems, you must choose either the SRM console or the
AlphaBIOS setup. You can store only one console.
• If you are running OpenVMS on these systems, update only the SRM console.
Hardware Release Notes 6–13
