On 10/12/2015 8:16 AM, Eric Auer wrote: > I see a few possibilities: Port 378 is on the mainboard and the PCI > card does not have the printer port active, port 378 is on the PCI > card but the BIOS does not use it because there was no printer port > without that card or the PCI card printer port is active but on some > non- standard I/O base... With a PCI card, it is more than likely that it is using a "non-standard" I/O base address, as pretty much all PCI adapters will use an address outside of the 400h bytes allocated for the ISA bus I/O addresses, usually a high(er) 16bit address or at least pointing to the PCI configuration address as CF8h, which in turn will provide information about further configuration information. But that is not accessible with any legacy BIOS functionality...
The only more or less simple hardware issue here could be that the PCI IO card using a PCI-ISA bridge and is mapping the onboard I/O to the same IO base addresses as the I/O on the motherboard. That should solvable by disabling the onboard parallel port, but that also would render the use of an external IO card rather useless... Ralf --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ------------------------------------------------------------------------------ _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
