From: Groepaz (groepaz_at_gmx.net)
Date: 2003-03-13 20:26:18
On Thursday 13 March 2003 16:18, MagerValp wrote: > >>>>> "G" == Groepaz <email@example.com> writes: > > G> uhm...since the c64 port supports the swithlink (which contains > G> 6551 aswell) i am surprised it isnt supported in the plus/4 > G> port..... should be pretty trivial to make the driver work there > G> that is (adjust i/o adress, adjust irq handling, done :=)) > > I gave it a shot, and IRQ handling was the stumbling block. The Plus/4 > only has a single IRQ line for all its devices, and the kernal > dispatches IRQs to the corresponding handlers. I wasn't familiar > enough with the machine to get it right, and there aren't any good > kernal disassemblies out there... you could however still write a driver in polling mode..... works nice for silversurfer so far (i didnt really bother yet doing a real driver with interupts :=)) gpz Message was sent through the cbm-hackers mailing list
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