[conspire] Cabal Follow Up

Ruben ruben at mrbrklyn.com
Mon Dec 10 22:40:18 PST 2012

On 12/10/2012 08:51 PM, Rick Moen wrote:
> Way back in the bad old days, we had ISA cards with things like RS-232C
> serial ports on them.  Each such port had to be hardware-configured
> (usually jumpers, though theoretically switches could be used) to
> assign a unique pair of hardware resources to each serial port, a
> hardware IRQ (interrupt channel) and an I/O base address.  I covered
> this situation in a 1995 magazine article:
> http://linuxmafia.com/faq/Hardware/chart.html
> As cited in my article, conventional IRQ assignments for serial ports were:
>   3   COM2 or COM4
>   4   COM1 or COM3
> Conventional I/0 base address assignments in 'h' = hexadecimal format:
> 3F8h COM1
> 2F8h COM2
> 3E8h COM3
> 2E8h COM4

O god, I remember this.  It was actually easier sometimes.  Boy, do I 
remember debugging all these jumpers



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