Subject: Re: Kingmax KEN0100-AF
To: Martin Husemann <>
From: None <>
List: tech-kern
Date: 01/20/2002 09:38:52
> > On the PC architecture, ISA bus devices only decode the bottom
> > 10 bits of the IO address space.
> Sorry, this simply is not true.
it's true for 8-bit ISA. not for 16-bit.

i have 8-port card which i set to 0x1100 port base with dips and it works.

> For a counter example see the "USR ISDN Sportster TA intern" cards, driven by
> sys/dev/isa/isic_isa_usr_sti.c. I have such a card and it definitively works.
> It uses the following offsetts
> #define USR_HSCXA_OFF   0x0000
> #define USR_HSCXB_OFF   0x4000
> #define USR_INTL_OFF    0x8000
> #define USR_ISAC_OFF    0xc000
> from it's base IO port for different chips (or parts of chips) on the card.
> Martin

Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.