Leo Weppelman wrote:

> Another cause of the problem might be that a wrong clock-source
> is selected.

>From /usr/src/sys/arch/atari/dev/zs.c:

static u_long zs_freqs_falcon[] = {
	/*
	 * Atari Falcon, XXX no specs available, this might be wrong
	 */
	PCLK/16,	/* BRgen, PCLK,  divisor 16	*/
	 229500,	/* BRgen, RTxCA, divisor 16	*/
	3672000,	/* RTxCA, ???			*/
	      0,	/* TRxCA, external		*/

	PCLK/16,	/* BRgen, PCLK,  divisor 16	*/
	 229500,	/* BRgen, RTxCB, divisor 16	*/
	3672000,	/* RTxCB, ???			*/
	2457600		/* TRxCB, ???			*/
};

You might try:

static u_long zs_freqs_falcon[] = {
	/*
	 * Atari Falcon, XXX no specs available, this might be wrong
	 */
	PCLK/16,	/* BRgen, PCLK,  divisor 16	*/
	 229500,	/* BRgen, RTxCA, divisor 16	*/
	3672000,	/* RTxCA, ???			*/
	      0,	/* TRxCA, external		*/

	PCLK/16,	/* BRgen, PCLK,  divisor 16	*/
	      0,	/* BRgen, RTxCB, divisor 16	*/
	      0,	/* RTxCB, ???			*/
	      0		/* TRxCB, ???			*/
};

At least 19200 baud (and below) should work that way. To be able
to use higher baudrates, you'll have to find out the RTxCB and
TRxCB frequencies.


Regards,
Waldi