test-drb April 2002

test-drb@ccmp.vtda.org

280 participants
1162 discussions

by vcf＠siconic.com

I have a Documation D150 card reader that I am trying to make operational. I fired it up today and ran a card through, only to have a big black streak get "printed" to the card. I thought this was odd, so I opened it up and found several problems. The black streak was caused by the roller that pulls the card through the slot. It's basically melted into a gooey ink-like mess. Actually, only one side of it has melted. The other side is mostly intact, so I may be able to just eliminate the melted side and still use this roller. It looks like this: __ __ | \/ | ==| |== <-- spindle |__/\__| ^- one side melted Then there is a rubber gasket that was around a disc that was situated perpendicular to the way the card slides through. This roller dried up and crumbled into several different pieces. ^ card goes in this way ---> and the rubber disk spun this way | | I think the purpose of this roller was to push the card against the guide so that it goes through the reader straight. Then there are two toothed belts driving cams from motors. One of them got completely obliterated. The radial threads inside the belt got wrapped around the drive cam and left a gooey residue on it. The other belt is still in tact but very gooey, and is probably going to go at some point as well. I was able to get this code off of it: SDP 6R6-055018C I did a Google search but didn't turn anything up on this reader. Does anyone know of a source to get replacement belts and parts for this reader? -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

24 years

The CommodoreOne is near!

by mcguire＠neurotica.com

On April 12, Cameron Kaiser wrote: > > Yeah. She's gonna get a flood of marriage proposals from dweebs > > she's never met. > > Actually, she already does and has publicly lamented about this before. Bummer. We should all have such problems. > Did I miss where you asked if she was cute, keeping in line with your > trademark theme? ;-) I already know she's cute. :) -Dave -- Dave McGuire "Hush and eat your vegetables, young lady!" St. Petersburg, FL - Mr. Bill

24 years

The CommodoreOne is near!

by mcguire＠neurotica.com

On April 12, James B. DiGriz wrote: > > I wasn't going to mention it...but yes, quite cute indeed. > > Absolutely. The thing is, I look at her work, and I tend to forget or > not care about that. I'm getting an inferiority complex, in fact. Me to, for the latter anyway. I don't forget...it just makes me wonder if she's single. ;) > Bet she's dreading slashdot, though :-) Yeah. She's gonna get a flood of marriage proposals from dweebs she's never met. -Dave -- Dave McGuire "Hush and eat your vegetables, young lady!" St. Petersburg, FL - Mr. Bill

24 years

TTL computing

by csmith＠amdocs.com

> -----Original Message----- > From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk] > Here's how I'd do it (to make an 8 * 1 bit fusible-fuse PROM). [snip] > The way it works is like this. Normaly the Rd/Pgm relay is in the Rd > state (as shown). In which case the sense relay is energised if the > selected fuse is intact. You can use the contacts of the > sense relay to > turn on/off a light bulb or something. Very close to what I imagined doing -- though, I hadn't gotten as far as an address decoder. :) Thanks. > To blow a fuse, select it with the decoder tree and then energise the > Rd/Pgm relay briefly. Enough current will flow via the > limiting resistor > to blow the selected fuse. When the Rd/Pgm relay returns to > the normal > position, there will no longer be a path to ground for the > bottom end of > the sense relay, so this relay will not be energised. Again -- a good plan. I was thinking about using a momentary switch for programming anyway, rather than anything more complex, so that fits exactly with what I wanted. > I am going to _have_ to make one of these just for fun.... I'm glad that I'm not the only one crazy enough to consider trying it. Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years

HP IPC (update)

by fmc＠reanimators.org

ard(a)p850ug1.demon.co.uk (Tony Duell) wrote (after Vassilis Prevelakis): > > The built-in printer takes hp92261a print cartridges which (amazingly) > > Is this the Thinkjet cartridge (little clear plastic thing with a black > rubber ink sack inside)? If so, then the printer electronics is likely to > be close to the Thinkjet as well (see above for my comments on HPIL on > this, etc). Yes, the Integral takes Thinkjet cartridges. I think the Integral's printer is just a Thinkjet repackaged to fit in the top of an Integral, though it's been a while since I've looked at or inside an Integral and lately my memory for these sorts of details has gone to hell. -Frank McConnell

24 years

"Foundations of Microprogramming" Available in UK (Long)

by celigne＠celigne.freeserve.co.uk

I'm certainly not going to get involved in a discussion about PALs and FPGAs, but if anyone wants to know more about microprogrammed machines, I have a book which I will gladly trade for any interesting terminal manuals. Beware, it's over 400 pages of machines I've never heard of. Contents follows: ACM Monograph Series Foundations of Microprogramming: architecture, software and applications Ashok K. Agrawala and Tomlinson G. Rauscher Academic Press, Inc. 1976 ISBN 0-12-045150-6 Chapter 1 - Introduction to Microprogramming Concepts 1.1 Basic Computer Organization 1.1.1 Basic Hardware Resources 1.1.2 Control of Primitive Operations 1.1.3 Generation of Control Information 1.2 Evolution of Microprogramming 1.3 A Simple Microprogrammble Machine - An Example 1.4 Microprogramming and Programming 1.5 Microprogrammability 1.6 Microprogramming, Microprocessors, and Microcomputers Chapter 2 - Architectural Characteristics of Microprogrammed Computers 2.1 Introduction 2.2 Hardware Components 2.2.1 Overview of Hardware Components 2.2.2 Control Store Design 2.2.3 Arithmetic and Logic Unit Design 2.2.4 Local Store 2.2.5 Main Memory 2.2.6 Data Paths 2.2.7 Summary of the SMM 2.3 Microinstruction Design 2.3.1 Introduction 2.3.2 The Vertical-Horizontal Characteristics 2.3.3 The Encoding Characteristic 2.3.4 Microinstruction Design for the SMM 2.3.5 Microinstruction Sequencing 2.3.6 Residual Control 2.3.7 Control Store Literals 2.4 Microinstruction Implementation 2.4.1 Introduction 2.4.2 The Serial-Parallel Characteristics 2.4.3 The Monophase-Polyphase Characteristics Chapter 3 - Microprogramming Languages and Support Software 3.1 Introduction 3.2 Microprogramming Languages and their Translators 3.3 Simulators and their Implementation 3.4 Computer Description Languages Chapter 4 - Computers with Vertical Microinstructions 4.1 Introduction 4.2 The Standard Logic CASH-8 4.2.1 CASH-8 Background 4.2.2 CASH-8 Architecture 4.2.3 CASH-8 Microprogrammability 4.3 The Burroughs B1700 4.3.1 Burroughs B1700 Overview 4.3.2 B1726 Architecture 4.3.3 B1726 Microprogrammability 4.3.4 B1726 Microprogramming Language 4.3.5 Sample B1726 Microprograms Chapter 5 - Computers with Diagonal Microinstructions 5.1 Introduction 5.2 The Hewlett-Packard HP21MX 5.2.1 HP21MX Background 5.2.2 HP21MX Architecture 5.2.3 HP21MX Microprogrammability 5.2.4 HP21MX Microprogram Examples 5.2.5 Additional HP21MX Features 5.3 The Digital Scientific META 4 5.3.1 META 4 Background 5.3.2 META 4 Architecture 5.3.3 META 4 Microprogrammability 5.3.4 META 4 Examples 5.4 The INTERDATA Model 85 5.4.1 INTERDATA Model 85 Background 5.4.2 INTERDATA Model 85 Architecture 5.4.3 INTERDATA 85 Microprogrammability 5.4.4 INTERDATA 85 Microprogram Example 5.5 The Microdata 3200 5.5.1 Microdata 3200 Background 5.5.2 Microdata 3200 Architecture 5.5.3 Microdata 3200 Microprogrammability 5.5.4 Microdata 3200 Microprogram Example 5.6 Other Computers with Diagonal Microinstructions 5.6.1 The Datasaab FPU 5.6.2 The MLP-900 5.6.3 The CONTROL DATA 5600 5.6.4 The Data General ECLIPSE Chapter 6 - Computers with Horizontal Microinstructions 6.1 Introduction 6.2 The Cal Data Processor 6.2.1 Cal Data Background 6.2.2 Cal Data Architecture 6.2.3 Cal Data Microprogrammability 6.2.4 Cal Data Microprogram Example 6.3 The PRIME 300 6.3.1 PRIME 300 Background 6.3.2 PRIME 300 Architecture 6.3.3 PRIME 300 Microprogrammability 6.4 The Varian 73 6.4.1 Varian 73 Background 6.4.2 Varian 73 Architecture 6.4.3 Varian 73 Microprogrammability 6.4.4 Additional Varian 73 Features 6.5 The Nanodata QM-1 6.5.1 QM-1 Background 6.5.2 QM-1 Architecture 6.5.3 QM-1 Microprogrammability and Nanoprogrammability 6.5.4 QM-1 Examples 6.6 The Burroughs Interpreter 6.6.1 Interpreter Background 6.6.2 Interpreter Architecture 6.6.3 Interpreter Microprogrammability 6.6.4 Interpreter Examples 6.6.5 Interpreter Applications 6.7 The Argonne Microprocessor (AMP) 6.7.1 AMP Background 6.7.2 AMP Architecture 6.7.3 AMP Microprogrammability 6.7.4 AMP Example 6.7.5 AMP Experiences 6.8 MATHILDA 6.8.1 MATHILDA Background 6.8.2 MATHILDA Architecture 6.8.3 MATHILDA Microprogrammability 6.8.4 MATHILDA Example 6.8.5 Additional MATHILDA Features Chapter 7 - Developments in Microprogramming Languages 7.1 Introduction 7.2 Register Transfer Microprogramming Languages 7.3 Higher Level Machine-Dependent Languages 7.4 Higher Level Machine-Independent Languages 7.5 An Evaluation of Developments in Microprogramming Languages Chapter 8 - Applications of Microprogramming 8.1 Introduction 8.2 Emulation 8.3 Program Enhancement 8.4 Executing Higher Level Language Programs 8.5 Operating Systems 8.6 Signal Processing 8.7 Graphics 8.8 Microdiagnostics and Fault Tolerance 8.9 Other Applications of Microprogramming Chapter 9 - Perspective 9.1 Overview 9.2 The Past 9.3 The Present 9.4 The Future 9.5 Concluding Remarks

24 years

PC MOS to PC DOS

by alan.townsend＠exgate.tek.com

How do I transfer data created by PC MOS in order for PC DOS (or windows) to be able to read it ?

24 years

Anybody know what an Intel Series 90 is?

by rigdonj＠cfl.rr.com

The title says it all. Joe

24 years

The CommodoreOne is near!

by mcguire＠neurotica.com

On April 12, Gene Buckle wrote: > > > > the I/O is custom PLD logic that is impressive, if it is standard logic > > > > chips, that is great that he could find the chips in prototype > > > > quantities. > > > > > It's not a he, it's a she. :) > > > > or inbetween ? > > > Not a chance. From the pictures at http://www.commodoreone.com, she's a > cute little wisp of a girl. :) I wasn't going to mention it...but yes, quite cute indeed. -Dave -- Dave McGuire "Hush and eat your vegetables, young lady!" St. Petersburg, FL - Mr. Bill

24 years

TTL computing

by csmith＠amdocs.com

> -----Original Message----- > From: Ben Franchuk [mailto:bfranchuk@jetnet.ab.ca] > The main reason I have never played with them is I could never find a > Fuse Prom Burner schematic that looked reasonable. I still > would like to > do a TTL computer with fused based proms ( or EEPROM's as modern > substitute )for control logic. I am just finishing up a nice > FPGA design At one point I considered making an "illustrative project" of building a pseudo fuse blown PROM out of several inline type fuses -- like are used in power supplies, for instance. It would be possible to illustrate not only electronically, but visually, the way that the ROM works. :) "The black ones are 0s... ;)" (or is that a 1?) Anything beyond a size of several bytes would be unmanageable, of course. I figured you might fit 64 bytes in the size of a VHS tape if you use small fuses. Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years

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test-drb April 2002