Doug Sutherland <doug at proficio.ca> writes: > I can see from the driver code in speakup.c that when you > specify speakup_ser=# that translates to a lookup that > returns the hexadecimal port 0x3f8, 0x2f8, 0x3e8, 0x2e8. > So I'm guessing the speakup drivers writes into memory > on the ISA bus at that port address, is this right? Yes, that is a simple array which just returns a port address where each of the UARTs should live if they are installed. We then talk directly to the UART and handle all the registers ourselves. I can't make any comment about the rest of your post because I haven't looked at any of the usb code yet serial or otherwhise. Kirk -- Kirk Reiser The Computer Braille Facility e-mail: kirk at braille.uwo.ca University of Western Ontario phone: (519) 661-3061
