Re: 6551 driver questions

From: Groepaz (
Date: 2003-08-24 22:19:08

On Sunday 24 August 2003 12:28, Ullrich von Bassewitz wrote:

> This depends on the baudrate. The B machines have a maximum baud rate of
> 19200, so at least the ones running at 2MHz should be fast enough. On the
> other side, 38400 is definitely too fast for a 1MHz machine like the C64
> when using the IRQ. The question would be if 19200 runs reliable on a 1MHz
> machine with a VIC, like the C64. Having interrupt driven transmit routines
> will remove a lot of busy waiting, and the standard disk routines can be
> used if the 6551 is connected to the IRQ line. Depending on the
> application, 19200 baud may not feel a lot slower than 38400.

mmmmh another idea would be looking at the novaterm drivers which appearently 
support the 6551 at up to 19200baud on a stock c64.


       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail pre-2.1.8.