test-drb

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101090 discussions

by rick＠rickmurphy.net

At 07:50 PM 11/30/2010, Ethan Dicks wrote: >In 7.3, I'm sure that's now true. I'm pretty sure I remember some >COBOL and BASIC back in the 4.x and 5.x days, but I can't promise that >my memory is 100% correct. I think that's highly unlikely, particularly with COBOL since emulated code wasn't something DEC wanted in the distribution. (and COBOL in the 4.x days used a number of instructions that weren't implemented in MicroVaxen.) DEC didn't want clearly poorly performing software to be in the kit. That's the argument that allowed TECO32 to become part of the VMS distribution. -Rick

15 years, 5 months

Norm Winningstad passes

by cclist＠sydex.com

Norm Winningstad, founder of Floating Point Systems and Lattice Semiconductor, dies at age 85: http://bit.ly/f2tM0s --Chuck

15 years, 5 months

Professor Sir Maurice Wilkes has died

by ard＠p850ug1.demon.co.uk

I canse anyone has not heard this... I have been informed that Professor Sir Maurice Wilkes (designer of EDSAC, etc) passed away yesterday (29th November 2010). :-( -tony

15 years, 5 months

On-Topic: Another pioneer passes

by wmaddox＠pacbell.net

http://www.bbc.co.uk/news/technology-11875821

15 years, 5 months

Free SGI monitor (York, UK)

by pete＠dunnington.plus.com

Anyone want a 17" SGI monitor? It's a Sony GDM-17E21 in "granite", as used on an Indy or O2. Has HD15 and 5xBNC connectors. It's off the O2 on my desk, but I now have a set of flat screens and no room to keep this CRT monitor. Collection is free from York UK -- sorry, but it's impractical to ship. -- Pete Peter Turnbull Network Manager University of York

15 years, 5 months

seeking particular branded SCSI hard drives

by nigel.d.williams＠gmail.com

I am looking for any of the following SCSI hard drives please: Micropolis 1578-15 50-pin SCSI 5-inch full-height 332MB Micropolis 1684-07M 50-pin SCSI 5-inch half-height 340MB or any Unisys branded SCSI drives. Some appear on eBay but the seller prices exceed my budget, especially once shipping costs to Australia are included, so looking for someone who might have some of these drives that they would like to part with for a modest price+postage costs. thanks.

15 years, 5 months

Alpha Micro

by fire＠dls.net

I know I posted this a few days ago, but I find it hard to believe that there are no Alpha Micro collectors on the list. Here is an opportunity to make some money by parting with your working Alpha Micro for no more than 60 days. Then you can have it back with ours (whatever you can salvage for parts, I think the MB is bad, but the rest works). Still no takers. I am told that AM6000, AM7000, AM8000 or Eagle 450 or Eagle 500 will work fine. Email me at fire at dls dot net. Bradley Slavik

15 years, 5 months

[TUHS] pdp11 question

by IanK＠vulcan.com

Oops, this was supposed to go to the whole list -- Ian > > > -----Original Message----- > > From: tuhs-bounces at minnie.tuhs.org [mailto:tuhs- > > bounces at minnie.tuhs.org] On Behalf Of Norman Wilson > > Sent: Thursday, November 18, 2010 10:58 AM > > To: tuhs at tuhs.org > > Subject: Re: [TUHS] pdp11 question > > > > Just to loop things around a bit: > > > > Some of the larger VAXes used small PDP-11s (and their > > bastard offspring) as console processors. > > > > This started with the very first VAX, the 11/780, which > > used an 11/23 as a console. The console ran a stripped-down > > system, possibly based on RT-11 or RSX-11, I forget (and > > am typing this on a train in the Outer Mongolia part of > > Texas where it's hard to look up references). > > > > It is an 11/03, according to the Console Interface Technical > Description manual and the part number of the processor board. The > system looks to me to be RT-11 based. I know that I could read/write > the floppies on an 11/03 running RT-11, which was how I recreated live > media from disk images. > > > I don't know the whole list of what was used as a console > > for different VAXes, but I do remember that the Nautilus > > series (8500-8550-8700-8800) used either a Pro/350 or a > > Pro/380, running P/OS, which was slightly more satisfactory > > than the rude English non-computer expansion of PoS might > > imply, but only slightly. Especially for those of us who > > wrote code to fit into UNIX on the VAX and talk to the > > console processor. > > > [snip] > > Another DEC machine to use an embedded computer as a console is the KL- > 10 processor. It uses an 11/40 running a modified version of RSX-11 > called RSX-20F. Given that the KL was introduced in 1975, it predates > the 11/780 in using this approach. -- Ian

15 years, 5 months

SCSI to MFM/RLL schematic

by afra＠aurigae.demon.co.uk

Hi, Does anyone happen to have the schematic of one of the SCSI->MFM/RLL boards ? I have the Adaptec ACB-4000 and Xebec S1410A board documents >from bitsavers but thy only have the schematics for the computer end. All the talk of interfacing to SCSI has got me wanting to have a go :) I'm just want to look and see how it was done in the olden days....failing that I guess I'm gonna have to start tracing tracks..... Cheers. Phill. -- Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric ! "You can twist perceptions, but reality won't budge" -- Rush.

15 years, 5 months

Drives which used an MC3470A head-amp

by classiccmp＠philpem.me.uk

Hi guys, As you might have gathered from my other thread, I'm toying with the idea of building a replacement controller card for my two dead double-sided Amstrad disc drives. Ideally I'd like to use as many "standard" parts as possible to ease debugging and future repair. I'll probably use a GAL to handle head-stepping and the write protect lockout, and LSTTL for the bus interface. I'm also planning on adding an overvoltage crowbar (or maybe some form of a MOSFET OVP switch) on the 5V rail to protect against the common killer of these drives: plugging them into a PC PSU (the power plug is a Berg floppy power connector, but with a mirrored pinout). I've got my hands on a couple of Texas Instruments MC3470A floppy disc read amplifier ICs, and the Apple Disk II schematics suggest how this can be tied to a drive mechanism. What I'd like to do is look at a few other drives which use this chip to make sure I understand everything correctly (a double-sided drive with a single 3470A would be handy). If I'm being honest, the TI datasheet for the chip is utter crap... So does anyone know of any other FDDs -- besides the Disk II -- which used the MC3470A as the head amplifier, or maybe a few applicable application notes? Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

15 years, 5 months

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