Software Availability By Platform And Os; Write Posting; Table 3-1 Rastergraf Software And Operating Systems Support - Rastergraf VFX-M User Manual

Rastergraf

3.2 Software Availability by Platform and OS

Table 3-1 Rastergraf Software and Operating Systems Support

Operating
System
LynxOS
LynxOS
Tru64 UNIX
(AKA
Digital Unix)
Solaris*
Windows NT*
Windows NT
VxWorks
VxWorks*
* contact Rastergraf for availability

3.3 Write Posting

Most CPU designs include pipelining and write posting. The CPU, which
is much faster than the host bus interface, is allowed to store (or post) a
write operation to the CPU board's Host bus controller. The controller
takes care of the write within the timing requirements of the Host bus.
Pipelining is a procedure whereby the CPU can process more than one
instruction at a time. As a result, instructions are not necessarily
completed in the order that they were started.
For example, if you wanted to first change a control register in I128S2
chip and then write to its associated frame buffer, you are not guaranteed
that the writing order is preserved. This could result in an incorrect
operation. The way to get around this is to insert memory barrier
instructions between these write operations. Rastergraf's software is
already tailored to correct this problem.
3-2 Software Summary
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Current OS
Version CPU Type
3.0 PowerPC
3.0 PowerPC
4.0 Alpha
2.6 SPARC
4.0 Alpha
4.0 x86
Tornado PowerPC
Tornado PowerPC
Supported Software
GLP
PX Windows
Driver for Tru64
X Windows
Server
PX Windows
Native Drivers,
VGA BIOS
Native Drivers,
VGA BIOS
GLP
PX Windows