Hello Paul,

05.03.95 00:49, you wrote a message to Jonathan Tew:

[...]

 PE> The only problem is that they only go up to 57600.  Does
 PE> anyone know why this would be?  

Which driver are you using? 
The source code from DDSK 1.2 states 57600 as maximum for COM01.SYS. SIO's
technical reference (1.26) states a maximum of 115200. This is also the
maximum supported on standard AT hardware (input clock = 1.8432 MHz,
internal divisor = 16 and software selected divisor = 1).

 PE> 115200 causes a parameter error, despite the fact that I'm
 PE> using the extended set bit rate function 0x43.  There was
 PE> some mention in the docs of higher bit rates only working
 PE> for enhanced uarts or something, but I am using it on a port
 PE> with a 16550, and I have used the mode command to set
 PE> BUFFER=ON, so I've run out of ideas after that.  BFN.

The IOCtl is defined for more decent hardware. Any hardware vendor
manufacturing a high speed UART would also supply a new driver (with a
higher limit).
I don't know whether a PS/2 (with DMA mode UART?) supports bit rates above
57600 (in COM02.SYS).

Bye,
	Vitus

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