Search found 1698 matches

by robespierre
Sat May 19, 2018 1:19 pm
Forum: SGI: Hardware
Topic: Tandem re-badged Challenge L Deskside
Replies: 21
Views: 319

Re: Tandem re-badged Challenge L Deskside

An Archive Corporation 2150S Viper QIC-150 (also reads/writes QIC-120 and reads QIC-24) https://archive.org/details/bitsavers_archive2132150SProductManualJun88_7488625 QIC drives of this vintage often have melted capstan rollers, and the tapes almost always have rotten belts, unless they carry the ...
by robespierre
Sat May 19, 2018 1:08 am
Forum: HP/DEC/Compaq
Topic: DEC 3000 Keyboard problem (LK401-AG)
Replies: 2
Views: 54

Re: DEC 3000 Keyboard problem (LK401-AG)

I believe there are DIP switches inside the keyboard that control the keyset, but I cannot look right now. According to the VT420 manual, the codes sent by the keyboard aren't affected by the country/language setting, they are translated in software.
by robespierre
Fri May 18, 2018 2:17 pm
Forum: Sun
Topic: Sun SparcStations: 13w3 out miseries...
Replies: 10
Views: 889

Re: Sun SparcStations: 13w3 out miseries...

To be specific, a fixed-frequency monitor is only designed for a single horizontal refresh rate. It is usually possible to use different resolutions that have the same H refresh, by adjusting the geometry. For example. it is quite easy to adjust a SGI CM2086A (a fixed-frequency 1280x1024 60Hz, 63.9k...
by robespierre
Wed May 16, 2018 6:04 pm
Forum: SGI: Hardware
Topic: How to identify Hardware Specs without powering on?
Replies: 2
Views: 95

Re: How to identify Hardware Specs without powering on?

Well, the specs of a simple machine like an Indy are pretty simple: 1. type of Processor Module 2. type of graphics 3. any option cards 4. amount of memory 5. type/amount of disks You can easily search for the model number of the disk drives to find out their capacity. Similarly it's easy to calcula...
by robespierre
Wed May 16, 2018 1:12 pm
Forum: Hardware Wanted
Topic: CRT projector (Barco)
Replies: 4
Views: 202

Re: CRT projector (Barco)

Can the Data projectors be upgraded to Graphics or Reality specs?
I had an opportunity to buy some Barco projectors about a decade ago, but they take a lot of space.
by robespierre
Sun May 13, 2018 10:56 am
Forum: SGI: Hardware
Topic: Plasmon Rewritable Magneto-Optical Disk thingy
Replies: 19
Views: 689

Re: Plasmon Rewritable Magneto-Optical Disk thingy

MO disks come in WORM and Rewritable variants, but also in multiple sector sizes. The sectors are molded into the disk so the size can't be changed, but some computer systems are only able to deal with a specific size. I would check that next. From scanning the Plasmon manual, I also see that it has...
by robespierre
Fri May 11, 2018 4:48 pm
Forum: Everything Else
Topic: Ruby…
Replies: 16
Views: 456

Re: Ruby…

Turing-complete computers don't exist, as no computer has an infinite memory. Actual computers also have capabilities that Turing Machines cannot, because they have the ability to synchronize with time and external events. All in all, Turing Machines are a rather poor model of computation as it happ...
by robespierre
Fri May 11, 2018 12:13 pm
Forum: Everything Else
Topic: Ruby…
Replies: 16
Views: 456

Re: Ruby…

Stripped of syntactic sugar, you are left with the semantics. It is not an accident that the denotational semantics of different languages is, well, different.
by robespierre
Fri May 11, 2018 1:53 am
Forum: SGI: Hardware
Topic: Anybody got a clue with PowerSeries?
Replies: 10
Views: 255

Re: Anybody got a clue with PowerSeries?

Is this a single-tower or twin-tower machine? IP7 GTX was sold in both variants. The disassembly steps are different. The power cabling is bolted to the backplane, you can try looking in there but there's nothing that would easily shake loose. I believe both single and twin towers have a diagnostic ...
by robespierre
Thu May 10, 2018 11:48 pm
Forum: Miscellaneous Operating Systems/Hardware
Topic: Xerox Alto Restoration
Replies: 41
Views: 3720

Re: Xerox Alto Restoration

Exorcizing a haunted Diablo drive:

by robespierre
Wed May 09, 2018 11:23 am
Forum: Hardware For Sale/Trade
Topic: eBay: VME V30/35 Boards
Replies: 7
Views: 302

Re: eBay: VME Indigo?

Looks closer to a VME 4D/35, with a Super Turbo graphics option in the second listing.
by robespierre
Wed May 09, 2018 10:57 am
Forum: SGI: Hardware
Topic: EVO woes
Replies: 7
Views: 501

Re: EVO woes

If I'm counting right, the broken pin is # 177, which is a user I/O pin. So the reason this pin was clipped is specific to SGI and the EVO design, not something you can learn from Altera.
by robespierre
Tue May 08, 2018 9:12 pm
Forum: Getting Started, Documentation, Tips & Tricks
Topic: Acquired Indigo2 IMPACT, My first (working) SGI+Questions
Replies: 40
Views: 1746

Re: Acquired Indigo2 IMPACT, My first (working) SGI+Questions

Your root disk (SCSI ID#1 in the lower bay) is configured to mount disk ID#2. Consider that when the system was working, it may not have been with the floptical installed, but with a second hard disk.
by robespierre
Tue May 08, 2018 8:06 pm
Forum: Getting Started, Documentation, Tips & Tricks
Topic: Acquired Indigo2 IMPACT, My first (working) SGI+Questions
Replies: 40
Views: 1746

Re: Acquired Indigo2 IMPACT, My first (working) SGI+Questions

It looks like your drive ID #2 (in the upper bay) is not responsive. It could be a loose cable or might be dead. Conflicts are inst's way of telling you that you have not supplied all the required sources. You should continue to feed it the rest of the CDROMs and issue "from" commands unti...
by robespierre
Mon May 07, 2018 10:03 pm
Forum: Apple
Topic: Fake Magsafe?
Replies: 3
Views: 381

Re: Fake Magsafe?

Unfortunately the cable is the same terrible self-destructing and short prone junk as the Powerbook G4 power supply. And it still is filled with glue that turns to a green sticky mess just as the strands start to break apart.

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