test-drb July 2019

test-drb@ccmp.vtda.org

138 participants
116 discussions

Recovering the ROM of an IBM 5100 using OCR (among other things)

by jnc＠mercury.lcs.mit.edu

> From: Liam Proven > This is *epic*. Indeed. I was blown away by the complexity of his technique for reading the digits. I can't believe there wasn't a much easier technique, though, e.g. using a logic analyzer and a small program to read through the ROS! Perhaps the challenge of doing it his way entertained him, though, like George Mallory's famous line about climbing Everest. Noel

5 years

NASA Ames (Moffet Field) Computation Division?

by cclist＠sydex.com

Anyone know what hardware was at NASA Ames in the late 70s? I've got some tapes from there and would like to avoid guessing. --Chuck

5 years

Need Fileware twiggy diskette picture for Wikipedia

by dave＠661.org

Someone informed me that the Fileware diskette image I uploaded to Wikipedia has unclear copyright status. See https://en.wikipedia.org/wiki/File:Fileware-floppy.jpg. Would someone with a good specimen please scan it and upload to Wikipedia or send it to me? -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

5 years

Latest Additions to the Virtual Warehouse of Computing Wonders Sale Inventory

by sellam.ismail＠gmail.com

Greetings Folks! I have finalized the latest batch of items added to the inventory of my Virtual Warehouse of Computing Wonders, and here it is: Commodore 64 Exatron MM800 Internal Memory IBM PCjr Power Expansion Attachment IBM 74F3465 The 3270 Connection Polaroid PerfectData DS/DD 8" floppy disk (10-pack) Xidex Precision DSDD 8" Floppy Disks (10-pack) Diablo Printwheel - APL 10 Diablo Printwheel - Courier 10 Diablo Printwheel - European Elite 12 Diablo Printwheel - OCR A Diablo Printwheel - Pica 10 Diablo Print Ribbon (Carton of 12) SmartPrint Printer Sharing Network Add-on Computer Module Symantec Think C for Macintosh 6.0 (Upgrade) Hayes Personal Modem 1200 Gravis Mac MouseStick II Apple Power Mac Processor Upgrade (APMPU) Orange Micro OrangePC MS-DOS Coprocessor Radius Full Page Display SE Corvus Systems Macintosh OmniDrive User Guide Corvus Systems Qbus Interface RT-11 System Reference Card RT-11 System Reference Card Convergent Technologies WK-100 WorkSlate Convergent Technologies WorkSlate Travel Task Ware Radio Shack TRS-80 Model 100 Portable Computer Radio Shack TRS-80 Model 100 Cassette Interface Cable TRS-80 Model 100 Calculator TRS-80 Model 100 Bar Code Drivers TRS-80 Model 100 Bar Code Writer TRS-80 Model 100 Executive Calendar TRS-80 Model 100 Function Plotter TRS-80 Model 100 Personal Finance TRS-80 Model 100 Portable Computing with the Model 100 TRS-80 Model 100 SCRIPSIT 100 TRS-80 Model 100 StarBlaze 100 TRS-80 Model 100 Tandy Code Tandy 102 Owner's Manual/Applications and BASIC Reference Guide IBM Personal Computer PCjr BASIC Reference IBM Personal Computer PCjr Guide to Operations Hands-On BASIC for the IBM PCjr AST VGA Plus Tall Tree Systems AT3-P w/JLaser-3 daughterboard Western Digital WD7000-ASC FASST2 SCSI Controller Ziatech IEEE 488 Interface for PS/2 Computers Everex 24E+ External Modem Epson FX-86e/286e Printer User's Manual Citizen Color Ribbon Okidata Okimate 20 Plug 'N Print for IBM PC and Compatibles Okidata Tractor Feed Option Kit (boxed) Memorex Epson MX-80 Printer Ribbon 3M DS,HD 5.25" Diskettes (10-pack) Dysan 100 MD2HD floppy diskette 10-pack Ohio Scientific 5.25" Mini Floppy Diskette (10-pack) Verbatim Datalife SS/DD 5.25" Minidisks (7-pack) Epson E95D0U External 5.25" Disk Drive Compaq MS-DOS Version 3 Reference Guide DEC PDP-8/L Instruction List reference card Osborne dBase II Version 2.3b (manual only) Altera MAX+plus II Programmable Logic Development System FHR Industries 1200 Intelligent Modem Commodore 64 HP 92220R HPIB Right Angle Cable (1ft) HP10833B HPIB Cable (2m) SunRize Industries Perfect Sound Timex-Sinclair 1000 Sinclair ZX81 case Apple Macintosh Plus (Platinum) Apple Macintosh SE w/Targus Carrying Case (Those are two different Commodore 64 units, one has a case "variation".) Links to the newly arrived items are here: https://docs.google.com/spreadsheets/d/1I53wxarLHlNmlPVf_HJ5oMKuab4zrApI_hi… I have discovered the myriad of Facebook vintage computing groups, so I have begun posting my sale lists there as well. However, I will always post notifications of new lists here and on the VCFed forums 24 hours before I unleash them on the FB groups, which results in a deluge of activity. In this way, I give you guys first stab at the action on the new stuff before the hordes descend upon it. You are welcome. As always, please contact me directly by e-mail to inquire about an item. Thanks! Sellam

5 years

Latest Additions to the Virtual Warehouse of Computing Wonders Sale Inventory

by commodorejohn＠gmail.com

I'll also vouch for Sellam. His prices are a bit higher than I might prefer, but he's a straight dealer as far as I've ever seen; I bought an Apple IIc from him and he gave me no trouble at all about exchanging it when the board turned out to be cracked.

5 years

IBM PS/2 Model 70 or compatible floppy drive wanted (Or help with current one?)

by mokuba＠gmail.com

Hey all, i'm having a fair amount of trouble with my PS/2's floppy drive... wanted to back up my BBS and none of the disks i put in would read or format! Oddly though, it WILL boot a disk that's inserted on power-on. I hear it try and hit the disk a few times while in dos repeatedly before failing with the R/A/F options ... and format tries to read it, then goes attempts to format it, and can't find sector 0 ..... I'm really confused about those symptoms since it boots the only bootable disk I had on hand - ironically spinrite 6 (I'm aware of how useful it is...) - so i'm looking at replacing it ... or figuring out what's wrong with it that it can boot a disk just fine, but not use one while in DOS ? .... and by wiggling the floppy a bit I just got it to format a disk while in the ... drive, and now it's making the noise it did before and stalling occasionally. Perhaps the disk just isn't catching fully? -- Gary G. Sparkes Jr. KB3HAG

5 years

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test-drb July 2019