[haiku-development] Re: S3 Video Driver

Axel Dörfler wrote:
You would need to use the ISA bus module, and then add ioctl's to your driver that lets the accelerant use the {write|read}_io_{8|16|32} functions much like SAVAGE_{GET|SET}_PCI. In the accelerant, you could then have a handy function that hides the ioctl() from you again.
I've noticed that both the pci_module_info and the isa_module_info struct's have {write|read}_io_{8|16|32} functions. Do these functions have the same functionality with regard to accessing PIO ports or is using the ISA module preferred? Currently the S3 driver uses the PCI module for accessing a few PIO ports to enable MMIO for the Virge chips and seems to work fine. 

Best regards,
Gerald

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