So I have a really old D-Link DE-100TP card
http://stason.org/TULARC/pc/network-cards/D/D-LINK-Ethernet-DE-100TP-for-PC-XT-AT.html
... and its default settings are port 300h, IRQ 3, and memory D0000h.
Now I'm trying to fit this into a 386 (just because I happen to have this as opposed to a proper 16-bit ISA card, heh), and I know from running the supplied hardware test on an XT that the card is good in all respects. But currently on the 386 the test, only going as far as to ask the port number, immediately declares "I/O Failure." I imagine there's possibly a conflict, but I'm rusty with 386 era and just can't think if anything on a relatively empty system would be using port 300h or what memory ranges should be dodged. I know IRQ 3 would be for a COM2, but there's only one serial port in this system, so it should be free. I arbitrarily bumped it up to 320h, but still got the I/O Failure message.
http://stason.org/TULARC/pc/network-cards/D/D-LINK-Ethernet-DE-100TP-for-PC-XT-AT.html
... and its default settings are port 300h, IRQ 3, and memory D0000h.
Now I'm trying to fit this into a 386 (just because I happen to have this as opposed to a proper 16-bit ISA card, heh), and I know from running the supplied hardware test on an XT that the card is good in all respects. But currently on the 386 the test, only going as far as to ask the port number, immediately declares "I/O Failure." I imagine there's possibly a conflict, but I'm rusty with 386 era and just can't think if anything on a relatively empty system would be using port 300h or what memory ranges should be dodged. I know IRQ 3 would be for a COM2, but there's only one serial port in this system, so it should be free. I arbitrarily bumped it up to 320h, but still got the I/O Failure message.