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In Reply to: Re: RS232 issue posted by STUART on August 24, 2004 at 05:34:57:
Hello Stuart,This is the situation.
The laptop running XTA's Audiocore controller programme uses a USB to RS232 converter. This converter will happily talk to a XTA DP226 via a D9 - D9 cable entering through the XTA DP226's RS232 9pin port.If you keep using the same USB - RS232 converter, then run the output through a RS232 - RS485 converter, then connect the xlr RS485 signal and plug it into the RS485 input on the XTA DP226 the problems begin.
Both the DP226 and AudioCore, the controller programme, are changed from an RS232 state to an RS485 state.
On one of the Sony Vaio laptops, this setup runs perfectly. On the other Sony Vaio laptop, this setup will only work in the RS232 mode.
The successful Sony laptop allocates, IRQ10 to the USB enhanced host contoller, IRQ10 to one USB universal host controller, IRQ11 to the other USB universal host controller.
The RS485 link doesn't work on one of the three USB ports.
The unsuccessful Sony laptop allocates IRQ6 to the USB enhanced host contoller, IRQ10 to one USB universal host controller, IRQ11 to the other USB universal host controller.
The RS485 option doesn't work on all three of the USB ports. The RS232 option works on all three.
ASFAIK Windows XP doesn't permit the user to access BIOS to re-allocate IRQ's.
This is where the problem lies.
Personally, I blame Microsoft.
cheers,
andy
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Follow Ups
- Re: RS232 issue - andy 13:26:36 08/24/04 (1)
- Re: RS232 issue - STUART 05:50:32 08/25/04 (0)
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