Re: SparcStation 4 serial console

[Jason Thorpe <thorpej%me.com@localhost>]

> On May 29, 2024, at 10:35 AM, Riccardo Mottola <riccardo.mottola%libero.it@localhost> wrote:
> 
> Hi David,
> 
> David Brownlee wrote:
>> zs0 at obio0 slot 0 offset 0x100000 level 12 softpri 6
>> zstty0 at zs0 channel 0 (console i/o)
>> zstty1 at zs0 channel 1
>> 
>> Are you able to test with a keyboard and display? - Just to confirm if
>> the firmware is able to route the console there
> 
> The chip is there and respons on the bus. Of course, no way to see if the output divers of the UART are gone.
> 
> I boot with Keyboard&Display, telnet in...

If you’re able to boot with a keyboard + display, then at least one of the UARTs is working properly.

I would be very surprised if the output drivers were toast, but if they are, they’re separate from the 85c30 UARTs (which just have TTL-compatible outputs).  I’ve often wondered why some enterprising hardware hacker hasn’t published a mod for these old workstations that remove the RS232 drivers and replace them with a FTDI chip so you can just hook up a USB cable to whatever you want to use as the serial console device :-)

> 
> [     1.000006] zs0 at obio0 slot 0 offset 0x100000 level 12 softpri 6
> [     1.000006] zstty0 at zs0 channel 0
> [     1.000006] zstty1 at zs0 channel 1
> [     1.000006] zs1 at obio0 slot 0 offset 0x0 level 12 softpri 6
> [     1.000006] zstty4 at zs1 channel 0
> [     1.000006] kbd0 at zstty4 (console input)
> [     1.000006] zstty5 at zs1 channel 1
> [     1.000006] ms0 at zstty5
> 
> 
> Riccardo

-- thorpej