Hi,
I've an old four-port serial board, labelled T4R-100. I'm
trying to use it as a console server for some of the crash'n'burn
machines around here.
Only problem is, I can't work out how to enable interrupts on the
board, or if it has a special AST four-port style register that can be
polled to see what's interrupting.
Does anyone have any data on this card, or know how the switches
should be set?
setserial ttyS9 auto_irq autoconfig
gives this configuration:
/dev/ttyS9, Line 9, UART: 16450, Port: 0x02a0, IRQ: 4
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal auto_irq
/dev/ttyS10, Line 10, UART: 16450, Port: 0x02a8, IRQ: 3
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal auto_irq
/dev/ttyS11, Line 11, UART: 16550A, Port: 0x02b0, IRQ: 0
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal auto_irq
/dev/ttyS12, Line 12, UART: 16550A, Port: 0x02b8, IRQ: 0
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal auto_irq
By trying to trace the tracks on the ISA board, it looks as though an
appropriate swicth setting should enable another interrupt --- one of
IRQ 2 3 4 5 6 or 7
Pins 1 and 8 on the dip switch head into a PAL. The only combination
I've been able to get to work so far is switch 1 on and switch 8 off,
which g8ives a sort-of-working configuration.
In a 133MHz pentium, though, characters keep getting missed.
Anyone got any ideas?
Peter C
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