How do I access the serial port from assembly?

[durwin]

Where can I find technical specifications on Performa 6360 serial port programming? I need to write assembly code to communicate via serial port to our hardware. I assume the printer port and modem port are the same rs422?

Any references are welcome.

Best Regards,

Durwin

[Sun Baked]

Almost sounds like you need information on writing a device driver for your device, and need it for OS 8/9.

http://developer.apple.com/documentation/macos8/mac8.html

Can't be of much more help than the link to the Legacy OS 8/9 Developer Page, or I'd link further to a sample device driver.

But you'll see link near the bottom right that may help.

Looking at the Page again Inside Macintosh: Devices (Chapter 7 - Serial Driver) (http://developer.apple.com/documentation/hardware/DeviceManagers/serialdriver/serial_drvr.html) :rolleyes:

[durwin]

I'll go read those references, especially last one. But let me elaborate. This "Serial Driver" will run on an RT OS which boots from a floppy. So it must be 100% self contained. No Mac OS dependencies. But that last URL looks like it will certainly help me understand that which I will need to know. If I can get the address the UARTS are at (or what ever chip they use for rs422), that would be in right direction.

Best Regards,

Durwin

[Sun Baked]

So looking back at the older System tech notes may also be helpful, if the first link doesn't go back far enough. ;)

http://developer.apple.com/technotes/indexes/legacy5-t.html#S