test-drb

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101090 discussions

by dm561＠torfree.net

Date: Fri, 31 Oct 2008 16:30:49 -0500 From: Chris Elmquist <chrise at pobox.com> Subject: Re: Looking for a ST419 I'm new here so I apologize for opening this old can of worms :-) <snip> That's the path I've been on. I envision over-sampling and then just playing and recording what was sent to the drive. I'd make no attempt to go inside that datastream and try to interpret what was read or written. If entire tracks were always written, then it seems rather straightforward to just store track images and play and record them as they are seeked to. <snip> Ya... so, again I'm new here :-) But I'll go away quitely and think about this some more-- knowing now that I can't cheat and do tracks at a time. Chris -------------Reply: Oh, I don't know; that's all it'd take to make a few of us Cromemco folks with failing MFM drives happy... mike

17 years, 6 months

Zilog System 8000

by jeffj＠panix.com

> From: Oliver Lehmann <lehmann at ans-netz.de> > Subject: Re: Zilog System 8000 > So - none has a S8000... at home? ;) The MARCH computer museum at New Jersey's Infoage has a Zilog Z8000 model 21. http://www.infoage.org http://midatlanticretro.org/ Sadly, I scrapped my model 21 and 31 when Linux overtook Unix as the preferred software developer's platform. I still have some pieces (SMD hard drive) but I gave away some of the main boards to someone claiming to want them for the CPUs. I'm unsure how to get it running from bare boards because I suspect the backplane was not just parallel connectors. All the slots were specific to the CPU, RAM, disk controller, serial ports, tape drive, etc. How I wish I had photos of the Exxon Office Systems office in New York's Rockefeller center in 1982 when they were selling the Zilog System 8000 running the Zeus OS as servers to Z80 systems running Z-net (their proprietory coax network). Only a few years later at the NJ Trenton Computer Fest, a fellow was selling a pair from the back of a red pickup truck. What a fall from grace! > I'm missing a backplane so I tried at first hooking up power on my CPU > module and connecting a serial interface to the tty1 (console) pins of > the bus-connector.... powering on the system makes the cpu getting a bit > warm but my console is quiet :( I'm not sure if I've to connect some > other pins as well with +5V or GND. NMI... RESET whatever... so I > wonder if someone has a S8000 at hand and can measure some things? I suspect you'll need the front panel with the reset and interrupt buttons (and a few LEDs) to invoke the ROM monitor. Or at least know where they connect. Yes, I miss having a real ROM monitor but it was no fun working on an abandoned system by myself. > From: "Paxton Hoag" <innfoclassics at gmail.com> > Subject: Re: Zilog System 8000 > I have a card set and backplane saved from a machine that went to > scrap, nothing else. It is lost in my container. I saved the hard drive since I was hoping to use it on another system, failing to predict the amazing velocity of new technology becoming available to everyone.

17 years, 6 months

Memory test util for classic macs?

by derschjo＠msu.edu

Anyone know of a decent memory test utility that runs on classic macs (68k based)? I have an old Mac Portable that I'm struggling to get an OS on -- I consistently get "bad F-line instruction" traps when booting from System 7 disks (floppies and CD-ROMs), which from what I can tell probably means bad memory. I'd like to find out if it IS memory, and if so, whether it's the onboard 1mb (I hope not) or on the 4mb expansion... My internet searches have come up dry (I've found stuff for OS X, and early PowerMacs, but nothing for the 68k line). Thanks, Josh

17 years, 6 months

HP9133D disk replacement.

by jeff.kaneko＠juno.com

Yah, I done that. The key is to find an MFM drive that has the same or greater Cylnder/Head geometry: It has to have at least the same number of cylnders, and at least the same number of heads. Keep in mind, though, that geometry alone does *NOT* guarantee that this will work!! The 9133 seems to be allergic to some MFM drives-- I could get most Seagate drives to work, for example, but not NEC's. My fave at the time was the Quantum Q540. I 'wasted' over half the drive, but I had alot of them at the time! When you format such a drive, you will not have a capacity greater than the original.[1] [1] Not quite true for the older 9133 V/X/XV drives. If you have a 'V' for example, you can replace it with a bigger drive, adjust the jumpers inside, and format for 10 or 15MB. -- Jos Dreesen / Marian Capel <jos.mar at bluewin.ch> wrote: Closely related to the previous post : I actually have an ST419, but is in use inside a HP9133D. Looking back to old classiccmp articles indicate that it is not easy to replace the ST419 by other MFM drives of different geometries. Has this changed ? i.e can somebody report a success in replacing the internal drive of an HP9133 ? Jos _____________________________________________________________ Find the apartment of your dreams by clicking here now! http://thirdpartyoffers.juno.com/TGL2121/fc/Ioyw6i3miig3oq0XVBmhWGbEvHZPivS…

17 years, 6 months

Catweasel Mailing List

by lynchaj＠yahoo.com

Hi, The original 1998 Catweasel mailing list has been reclaimed and is operational again. If you are interested in Catweasel please join the mailing list. http://groups.yahoo.com/group/catweasel Thank you and have a nice day! Andrew Lynch

17 years, 6 months

Somewhat OT: Google Indexing OCR'd PDFs

by aek＠bitsavers.org

> Could this indeed be useful, especially when sites like Bitsavers are indexed? I've been watching this fairly closely, since I started to see the content being OCRed on the mirrors.

17 years, 6 months

Somewhat OT: Google Indexing OCR'd PDFs

by josefcub＠gmail.com

http://googleblog.blogspot.com/2008/10/picture-of-thousand-words.html Could this indeed be useful, especially when sites like Bitsavers are indexed? Josef -- "I laugh because I dare not cry. This is a crazy world and the only way to enjoy it is to treat it as a joke." -- Hilda "Sharpie" Burroughs, "The Number of the Beast" by Robert A. Heinlein

17 years, 6 months

Old Heath Software - New In Box - Query

by n6ki＠sbcglobal.net

I have come acquired a Heathkit Box of an RTTY Software program, unopened and I do not want to open the box and ruin it's value to collectors The only number on the box are there SF-9006 00108 In the estate sale there was a unbuilt kit with an 8 inch disk drive that a ham friend of mine bought The box size is about 12" X 12" X 3" thick I expect it is full of Floppy disks and a manual or instruction sheet I expect there may be 8 inch floppies in it as if they were 5 inch, why would teh box be so big ??? Any info on contents and value appreciated Thanks 73, Dennis N6KI

17 years, 6 months

any Apollo fans out yonder?

by chrism3667＠yahoo.com

I know I posted this before. But there's been so little feedback...

17 years, 6 months

anyone utilizing early Macs to access the internet?

by jvdg＠sparcpark.net

2008/10/31 Zane H. Healy <healyzh at aracnet.com>: > Can any pre-Mac OS X system run a browser that supports modern websites? Not really. > This was the problem that caused my Mom to upgrade a couple years ago. > Besides now that they've been selling Intel-based Mac's for a few years, > doesn't the G5 2x2 I'm using count as an "early" Mac? :-) Considering "the Mac" as a family of computer systems celebrates its twenty-fifth anniversary next year, and the PowerMac G5, which was cancelled merely three years ago, certainly doesn't qualify as an "early Mac". IMHO, of course. :-P .tsooJ

17 years, 6 months

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