Quote:
Does the use of "yet" mean that parallel ports might be supported in the future? If so, any idea when?!!!
Maybe. No. Even if it does, it will almost certainly not support high speed access as there is so much latency in using byte wise access and parallel port access is notoriously CPU intensive:
RISC OS APP writes a byte
VA 'parallel port' writes to parallel port stream
x86 switches to ring 0
byte propagates down driver stack
windows driver writes byte to port
...
handshake comes back and generates interrupt
...
windows driver receives interrupt
driver signal propagates up stack
event is generated to signal interrupt to VA
...
VA 'parallel port' receives interrupt notification
signals interrupt to virtual arm
...
There are huge latencies per byte. Using a fifo would help and a stream would be even better but RISC OS apps that expect to write a byte and then poll for status are in for a hard time.
Graeme.