test-drb October 2001

test-drb@ccmp.vtda.org

259 participants
770 discussions

looking for documentation for 1963 minuteman missile computer

by technos＠nerdland.org

On Wednesday, October 17, 2001 9:55 AM, Gene Buckle [SMTP:geneb@deltasoft.com] wrote: > > > For the gun type, all bets are off - it's a _much_ simpler design. > > > > > > I wonder what kind of yeild you'd get using a .50 diameter bullet against > > > a 1.00 diameter target. (inches) > > > > The answer is 0. The ISTR that the critical radius for U235 is about 9 cm. > > For plutonium, the critical radius is about 5 cm. Plutonium doesn't work > > too well in the gun types, so you would tend to get a small but extremely > > messy explosion even with a critical assembly. > > > > There are tricks to getting the critical radius down to lower values... > > > Hmmm. Well, like I said, I'm not a weapon designer. I don't even play > one on TV. :) > > (does the trick involve Tritium, or is that just a yield enhancer for > implosion types?) > > g. > Naw.. Neutron generators.. Basically a golfball sized device that spits off tons of neutrons.

23 years, 2 months

Unidentified device: trans lux teleprinter

by dhquebbeman＠theestopinalgroup.com

Strange.... Trans-Lux was the name of a chain of long-gone movie theaters... -dq -----Original Message----- From: McFadden, Mike [mailto:mmcfadden@cmh.edu] Sent: Tuesday, October 16, 2001 11:17 AM To: 'classiccmp(a)classiccmp.org' Subject: Unidentified device: trans lux teleprinter I came across a terminal that was labeled Trans Lux Teleprinter, The case is blue and there is a multicolored keyboard, some red, blue and white keys. I have tried google and altavista web searches with out any luck. I haven't taken the pile of computers apart to look at the name plate. Any knowledge about this device? Mike mmcfadden(a)cmh.edu

23 years, 2 months

IIgs using hard disk 20

by dhquebbeman＠theestopinalgroup.com

> Doug: > > It was through the floppy port. It used a special boot > disk with a "HD20" init to make it work. > > I haven't opened mine recently, but the drive only had one I/F > connector on it but I can't remember the pin count. I could > look tonight. Aging is a terrible price to pay for maturity... :-( -dq

23 years, 2 months

IIgs using hard disk 20

by DAW＠yalepress3.unipress.yale.edu

! From: Louis Schulman [mailto:louiss@gate.net] ! ! Won't work, simply because the floppy port on the GS doesn't ! have the firmware to support the HD20, while ! the early Macs did. But there are many better hard drive ! options for a GS, anyway. ! ! Louis ! ! On Mon, 15 Oct 2001 16:39:02 -0400, Chris wrote: ! ! #Does anyone know if an Apple IIgs can use an old Macintosh ! #Hard Disk 20. The Mac HD is NOT scsi, but rather uses the ! #disk drive port on a Mac. It ... Louis --- Umm, okay, what are those other HDD options? I'm curious... :-) --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818

23 years, 2 months

Unidentified device: trans lux teleprinter

by mmcfadden＠cmh.edu

> I came across a terminal that was labeled Trans Lux Teleprinter, The case > is blue and there is a multicolored keyboard, some red, blue and white > keys. I have tried google and altavista web searches with out any luck. > I haven't taken the pile of computers apart to look at the name plate. > Any knowledge about this device? > > Mike > mmcfadden(a)cmh.edu >

23 years, 2 months

HP1000F/2117F

by Joseph.Salamido＠tobyhanna.army.mil

Skipped content of type multipart/alternative

23 years, 2 months

Information Please -- HP 13037D Storage Control Unit

by Joseph.Salamido＠tobyhanna.army.mil

Skipped content of type multipart/alternative

23 years, 2 months

IIgs using hard disk 20

by RCini＠congressfinancial.com

Doug: It was through the floppy port. It used a special boot disk with a "HD20" init to make it work. I haven't opened mine recently, but the drive only had one I/F connector on it but I can't remember the pin count. I could look tonight. Rich ========================== Richard A. Cini, Jr. Congress Financial Corporation 1133 Avenue of the Americas 30th Floor New York, NY 10036 (212) 545-4402 (212) 840-6259 (facsimile) -----Original Message----- From: Douglas Quebbeman [mailto:dhquebbeman@theestopinalgroup.com] Sent: Tuesday, October 16, 2001 9:41 AM To: 'classiccmp(a)classiccmp.org' Subject: RE: IIgs using hard disk 20 > BUT... predating that was a "Macintosh Hard Disk 20" that was not scsi. > Rather is was some drive (don't know what kind, but MFM seems sensible > enough) that used a special adaptor board that enabled it to plug into > the disk drive port on a bunch of the older macs. It was all enclosed > (drive, power supply, adaptor board) in one nice zero footprint beige > case (back when beige meant brown, and not grey like "beige" computers of > today). In spite of the now long-extant senility, I seem to recall that these interfaces through the serial port, not the floppy port. Regards, -dq

23 years, 2 months

looking for documentation for 1963 minuteman missile computer

by dhquebbeman＠theestopinalgroup.com

> At 11:43 PM 10/14/01 -0400, you wrote: > >On Monday, October 15, 2001 9:25 PM, Carlos Murillo wrote: > >> Rocket science is in the rocket engine. Navigation is > >> not that hard, comparatively... > > > >When all you have to navigate with is a computer that takes > >a full (milli)second to multiply and a telescope that could probably > >only sense the horizon it gets a bit harder.. > > Agreed. But at this point in time, navigation algorithms that > are sufficiently precise can be developed/recreated by (almost) > anyone with a phd in control theory. Rocket engine science is > lots harder, because it is still a (largely) experimental affair. True. Despite development over 40 years, witness the recent death of the Linear Aerospike. Although in fairness, the engine is working fine, it's the fuel tanks that we still don't know how to build... -dq

23 years, 2 months

SCSI problems

by dhquebbeman＠theestopinalgroup.com

> A friend has a 9 gig Seagate drive and an Adaptec 1542C card and is > having a helluva time getting it to work with a late model > motherboard. > boots okay from an IDE drive, but the aforementioned setup > hangs almost > every time. > > Do you know of an incompatibility with the drive and card; > i.e. too much > drive for the scsi bios to understand??? The card has trouble with high transfer rates. The on-board BIOS allows you to limit that to 5MB/s; when I slowed it down to that, it worked fine for me. YMMV (rather, HMMV), etc... -dq

23 years, 2 months

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test-drb October 2001