TXBUFFER and TXQUE under NT 4.0

[Bob Scott]

I wrote a program using:

COMM(#hComm, RXBUFFER)
COMM(#hComm, TXBUFFER)
COMM(#hComm, RXQUE)
COMM(#hComm, TXQUE)

The program ran fine under W95 Osr2 but lost the TX functions
under NT 4.0. Is this expected?

Thanks,

~Bob

[Lance Edmonds]

I'm not sure what you mean by "lost", but in some O/S's it is not possible to set or query the transmit buffer size (ie, the underlying comm API functions do not return such information to PowerBASIC).

COMM SEND/PRINT are "synchronous" functions, so execution continues only when the data was successfully placed in the transmit que, otherwise it waits for this to occur (or an error is encountered and returned in ERR/ERRCLEAR, etc).

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Bob Scott]

Lance,

Thanks for the reply. The TXBUFFER and TXQUE were both '0'
which I assume means that the data was not available. I understand
that NT is isolated from the hardware but I was surprised that
the RX values were available and not the TX.

~Bob


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[Tom Hanlin]

see also http://www.powerbasic.com/support/pb...ead.php?t=3851

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tom hanlin
powerbasic staff