Update! The HP9000/712‘s Power Supply Unit had an error in the IC STR80154A that is responsible for doubling 115V to 230V. It was latched up in doubling mode, causing a short circuit.
Now the machine is in "Graphics Error" mode (flashing power LED). Screen says out of range (not sure if true or it just doesn't like 75Hz). Does anyone know in which actual situations the LED flashing happens and when not?
Oooh! MAE on a PrecisionBook!
http://oldvcr.blogspot.com/2025/08/a-real-powerbook-macintosh-application.html
Ich habe gerade ein paar #retro bzw. #vintage Computer abzugeben.
Folgenden Maschinen suchen ein neues Zuhause:
* #Sun #sparc station IPC
* Sun Ultra 5 (64 bit sparc)
* HP 712/60 (gecko #PARISC)
* #MicroVAX II (BA123)
Die Geräte müssten in Bochum abgeholt werden.
Von der #VAX habe ich gerade noch keine Bilder, da die noch im Keller sitzt.
Mir genügt es, wenn die Maschinen ein liebevolles Zuhause finden, und nicht dem Elektroschrott anheim fallen müssen.
Boosts welcome
@rl_dane @NanoRaptor https://www.openpa.net/nextstep_pa-risc.html
NeXTSTEP on a 712/100XC is quite fast. For some special video modes of the HP 712/715, NeXTSTEP provided specific support, e.g. the 4096-color-virtual-million-color-modes.
I’m going to visit my parents next week, and this would be a good opportunity for me to bring my 715/50 back with me, so I could hopefully fix the power supply.
But while the machine itself wouldn’t be too big or too heavy to take it on the train, its original box is about twice its size :-(
Neuzugänge im Alteisenregal. #vintagecomputing #retrocomputing #risc #parisc #powerpc #cpu
Two #BlueSCSI kits arrived in the mail today, ordered from @onegeekarmy
Expect some more #HP #parisc shenanigans in the coming weeks!
Does anyone recall the power shift that the HP 9000 Series 700 represented upon release?
LET'S RAP ABOUT IT.
"You want power, you want speed.
The 700 Series is what you need.
PA-RISC has set the pace...
Hewlett Packard now leads the race...
The Series 700 is the name
Leaders in the work-station game
720, 730, 750 too
Supercharging all you ever need to do..."
I just reassembled it and briefly plugged it in. There’s a high-pitched sound coming from the primary (left) side of the PSU and no output. Any quick guesses what the issue might be?
I don’t have the time to investigate further for now, but if the issue is indeed on the primary side only, this may actually be good news. #PARISC #HPUX #Retrocomputing
I was particularly worried about the 715’s power supply, as it doesn’t work. So something’s certainly broken, but I don’t see anything obviously wrong about it. In any case, I discovered that it’s even easier to open than I expected. #PARISC #HPUX #Retrocomputing
Used the occasion to finally check on the computers in storage at my parents’ house, notably the HP 9000 715/50, the HP 9000 C200, and the PowerMac 7300/200. I was quite worried about leaking batteries and capacitors, but these ain’t home computers, and I’m always amazed by the build quality and the attention to detail. #PARISC #HPUX #PowerMac #Retrocomputing
Today's unexpected #VintageComputing / #RetroComputing find... A Hewlett Packard 712/80 (#HP9000) workstation. Looks like I will have another #NextStep machine in the stable.
It’s the model 712 
