[rescue] HP 9000 712/* power supply?

[Ville Laustela]

Hi,

I presume this is the manual you already found: http://ftp.parisc-linux.org/docs/platforms/712_technical_manual.pdf, the power supply stuff is in 7-1, also a small bit about the START_PWR_DOWN_L signal.
The wire colours described match what I have in my 712/60 (the motherboard is A2263-66510), pin one/white wire is closest to the SCSI connector.

—
Ville



> Mouse via rescue <rescue at sunhelp.org> kirjoitti 6.6.2025 kello 19.47:
> 
> I've got a motherboard by HP.  It's marked A2263-66511, which I think
> means it's the board for one of the PA-RISC 9000 712/* machines.
> 
> I'd like to get it running.  But that means feeding it power, and I
> don't have its case.  The power connector looks (I didn't try plugging
> it in) roughly mechanically compatible with the pre-ATX power
> connectors, the one with two 1x6-pin connectors, though the board's
> pins aren't quite right for that.  Also, it has only 11 pins, so it
> obviously isn't the same.
> 
> I did manage to find a PDF describing the power supply, though I'm not
> certain it's for this board; if it is to be believed, the power pinout
> is nothing like that pinout.
> 
> The PDF says
> 
> pin	what
> 1	START_PWR_DOWN_L
> 2	POWER_ON_L
> 3	+5
> 4	GND
> 5	+12
> 6	GND
> 7	+5
> 8	+3.3
> 9	+5 (SCSI)
> 10	GND
> 11	+5
> 
> There is silkscreen on the non-component side of the board marking pin
> 3 as VDD, pin 5 as P12V, pin 8 as VDL, and 9 as VTERM.  There is also
> "GND" about midway between pins 10 and 11 and VDD about one pin spacing
> beyond 11 (about where pin 12 would be if there were a pin 12); I
> suspect those are supposed to be on pins 10 and 11.  This fits well
> with the above.
> 
> I could solder wires onto the etch side of the board for +5, +3.3, and
> +12, but then I'd need to do something with pins 1 and 2.  Does anyone
> happen to know, or know of documentation on, those two pins, at least
> enough to power the machine up?
> 
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