test-drb

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101090 discussions

Disc reader project -- quick status update

by classiccmp＠philpem.me.uk

Hi guys, Just a quick update regarding the disc reader project. I've added sync-on-MFM-word to the microcode, and the software MFM decoder is working. I got the first valid MFM decode using the "soft-PLL" decoder engine about five minutes ago -- the first 16 bytes of an MS-DOS 5.0 boot sector. I can see all the sector headers, address marks and pad bytes displayed on the screen. "Just a bit" more than the PC disc controller lets you see... :) Now to find a disc with a slightly less ordinary format... perhaps a BBC Micro (Acorn DFS) disc? My target is still an Amiga disk, if I can get my hands on one with known contents. More to come when I've had some sleep... I'll see if I can get some photos of the hardware (and maybe schematics) uploaded in the next couple of days. Cheers, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

16 years, 4 months

Tracking down "crackling" noises in monitor

by julianskidmore＠yahoo.com

On 7 Dec 2009 at 21:37, Chuck Guzis wrote: > My first instinct says "flyback transformer". Which reminds me, if only I can get the flyback transformer fixed on my old Mac SE I could get it working again! But it's rather specialised I fear :-) -cheers from Julz @P

16 years, 4 months

Visible Storage exhibit @ CHM

by evan＠snarc.net

Hi all. I got an email from the Computer History Museum (that's the BIG one in California) ... says they're closing the main exhibit this month, and it will re-open bigger and better toward the end of next year. So now's a good time to go visit them before they redesign it.

16 years, 4 months

Pinging Ian Primus

by dbetz＠xlisper.com

Has anyone heard from Ian lately? I've been trying to contact him at the address ian_primus at yahoo.com with no luck. Thanks, David

16 years, 4 months

CNC info wanted

by cclist＠sydex.com

I'm looking for information on the Excellon CNC-6 controller. I believe this is a Z8000-based system from the 80's still in fairly wide use. Mostly, I'm interested in general information regarding details on the hardware. If you can offer some illumination, please contact me off-list, if you feel that this isn't appropriate for discussion (I've not seen much mention of CNC controllers to date). Thanks, Chuck

16 years, 4 months

ISO: 147533-001 ISBC 286/12 SBC Hardware Ref Man

by aek＠bitsavers.org

Anyone have the manuals for Intel's 286/12 board, and the later iSBC 215 board (215b) that directly supported 5" drives (used WD controller chips)?

16 years, 4 months

Running Computers Cold

by healyzh＠aracnet.com

Okay, this is the first time I've ever had to worry about this. When is it to cold to run a computer? It's 35F out in the garage, and it is supposed to get a lot colder tonight. I just shut the dehumidifier down (to cold to run it) and setup a heater near the computers (and other stuff I don't want to freeze). Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

16 years, 4 months

PCMCIA (not Cardbus) interface (was Re: isa usb card)

by ethan.dicks＠gmail.com

On 12/9/09, Sridhar Ayengar <ploopster at gmail.com> wrote: > I know for a fact that there once was made a USB interface for > non-Cardbus PCMCIA, because I have one. I would assume this card would > Just Work(tm) in an ISA->PCMCIA adapter. What's the vendor and part number? I once had a Dell Latitude LM I bought new in 1996 that was running Solaris 7 or RedHat Linux depending on what disk I had installed (I recently saw the Solaris 7 disk for it in my box of 2.5" IDE disks). The Dell FAQ at the time said that there was no way to put a USB port on the machine (I think it was one of the last name-brand laptops to not have that capability). For machines of that era, a PCMCIA (not-Cardbus) USB adapter would be perfect, depending on driver support (i.e. - something more than Win95 or Win98). I have some interesting machines, like a Planar-brand 486-based "medical PC" that's sort of like a wall-mount tablet or laptop - no batteries, but has a built-in LCD, PCMCIA, one ISA, *external* IDE CD-ROM interface (DB-44HD), external floppy (DB-25), that could use a USB 1.1 interface for either external storage or unusual HID goodies. -ethan

16 years, 4 months

Running Computers Cold

by jlobocki＠gmail.com

Not too sure, but I remember reading an article about the IBM PS/2 model 25, and how they had to sit and come to room temperature after being moved or something would fry.... On Tue, Dec 8, 2009 at 11:19 PM, Zane H. Healy <healyzh at aracnet.com> wrote: > Okay, this is the first time I've ever had to worry about this. When is it > to cold to run a computer? It's 35F out in the garage, and it is supposed > to get a lot colder tonight. I just shut the dehumidifier down (to cold to > run it) and setup a heater near the computers (and other stuff I don't want > to freeze). > > Zane > > > -- > | Zane H. Healy | UNIX Systems Administrator | > | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | > | MONK::HEALYZH (DECnet) | Classic Computer Collector | > +----------------------------------+----------------------------+ > | Empire of the Petal Throne and Traveller Role Playing, | > | PDP-10 Emulation and Zane's Computer Museum. | > | http://www.aracnet.com/~healyzh/<http://www.aracnet.com/%7Ehealyzh/> | >

16 years, 4 months

HW supported by ULTRIX?

by oldcpu＠rogerwilco.org

I've been trying to find a chart of support hardware under the various releases of DEC's ULTRIX flavor of UNIX, but am drawing a blank. I have a couple of systems that came to me with versions of ULTRIX, a MicroVAX II/GPX running v2.2, and a DECSystem 5400 (RISC-based) running v4.2 (I've since upgraded this to v4.5...thanks Barry!) So, I'm curious about which VAX and RISC systems were supported by which versions of ULTRIX. A lengthy Google search finally turned up a chart for VMS/OpenVMS at: http://h71000.www7.hp.com/openvms/hw_supportchart.html which is useful for the VMS side of things. Glad to have found it. Can anyone point me to a similar reference related to ULTRIX? -- Jared

16 years, 4 months

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