We welcome retro users & hardware gurus alike! Come and join the party :)
https://www.exxosforum.co.uk/forum/
Oh, don't worry, I've got plenty of candidates. More than you I expect, as you keep on fixing yours! :lol:rubber_jonnie wrote: 03 Mar 2022 15:14I like the sound of that :)mrbombermillzy wrote: 03 Mar 2022 15:13
We need a 'HW horror stories' section of the forums for stuff like this.
Then we definitely need one!!mrbombermillzy wrote: 03 Mar 2022 15:16Oh, don't worry, I've got plenty of candidates. More than you I expect, as you keep on fixing yours! :lol:
Yeah, no PoE devices needed. I could rig up thick bodge wires if I wanted to.rubber_jonnie wrote: 03 Mar 2022 15:13Wow, scorchio!!stephen_usher wrote: 03 Mar 2022 15:02 Actually, I just cut the power planes back...
IMG_2595.jpg
Other than complaining that the PoE power isn't working the Aruba core switch is now happy, so we can use the unit as an emergency replacement.
I suppose no PoE is better than no switch, assuming you aren't using it for PoE devices.
That being said, I hope your leak is fixed!!stephen_usher wrote: 03 Mar 2022 15:59Yeah, no PoE devices needed. I could rig up thick bodge wires if I wanted to.rubber_jonnie wrote: 03 Mar 2022 15:13
Wow, scorchio!!
I suppose no PoE is better than no switch, assuming you aren't using it for PoE devices.
Yikes, that's a lot!!stephen_usher wrote: 03 Mar 2022 17:48 Yeah, it only lasted for about 24 hours of full mains water pressure out of an open pipe a couple of floors above the machine room. The building is about 100m long and it had about 4cm of water over the whole floor.
Good luck with the analysis, I know how you feel trying to decode the LA output on the 600XL, I suspect you are a little better at it than I.stephen_usher wrote: 07 Mar 2022 22:14 I think I've made some progress with analysing the logic analyser output from the Sun 3/80 "DECODE 1" chip.
I exported the capture to a CSV file and then used Perl to determine which signals correlated to the output of the serial chip 2 write signal. This allowed me to quickly rule out a number of pins as they had no correlation at all.
Using this information I think I can determine that pin 3 is the bus W/R signal (high = write, low = read), the output of pin 19 correlates to serial port access and pin 42 (the ultimate pin, obviously) selects which serial port chip is being accessed. Well, those are my guesses anyway. I should be able to use a bread board and a GAL to generate the signals now. I'll first just use the logic analyser to see how these match the originals... or just connect them and see what happens. :-)
This will probably all have to wait until at least the weekend though.