test-drb June 2013

test-drb@ccmp.vtda.org

216 participants
271 discussions

by useddec＠gmail.com

Anyone need any? Please contact me off list. Shipping from 61853 Illinois. 2-F1002 1-F1003 1-F1004 1-F1005 1-F1006 7-F1007 1-F1008 1-F1009 7-F1010 4-F1011 1-F1013 6-F1021 Thanks, Paul

11 years, 5 months

Using an internal Superdrive or 800K macintosh floppy on IIgs

by alexandre.tabajara＠gmail.com

Stupid question, but here we go :o) In Brazil, as you may imagine, 3.5 drives for apple computers are pretty rare. But you can find with some effort internal macintosh drives from the tras...eh...performa computers that nobody wants. I got my IIgs (with no floppy drives) and made a simple pinout converter for using my old apple clone drives (http://www.tabajara-labs.blogspot.com.br/2013/06/e-quem-nao-tem-adaptador-d…). But reading the schematic of IIgs, I **BELIEVE** I can use the 800K or 1.44MB internal drives from macs into the 19 pin port of the IIgs. After all, is the same IWM the old macs use. I just have some questions which I wasn't able to answer yet: - How are 3.5 drives selected? I **believe** I must make an AND with ENABLEx and 3.5_ENABLE lines - Was it tested yet? I wasn't able to find anything concrete on the net - Superdrives doesn't have the speed select pin? - How is the disk ejected? I see no control for it on the drive pinout. I believe a combination of the pins or some kind of signal change is needed, but since I don't have an original apple drive, I'm not able to put the logic analyser and discover how it works :o( Thanks :) Alexandre (full of nasty ideas :D) --- Enviado do meu Motorola PT550 Meu site: http://www.tabalabs.com.br

11 years, 5 months

Any DEC LCG users out there?

by useddec＠gmail.com

I have the following MG10 boards here and looking for a good home. 7- M8588 6- M8591 6- M8592 4- M8593 16-M8594 If interested, please contact me off list. Shipping from 61853, Illinois. Thanks, Paul

11 years, 5 months

seeking IBM 5215 Selectric printer or IBM 5218 Printwheel printer for IBM Displaywriter

by nigel.d.williams＠gmail.com

If anyone has either the IBM 5215 or IBM 5218 printer that was commonly used with the IBM 6580 Displaywriter and would like it to go a new home where it will be operated with a DIsplaywriter, I would be interested in discussing further. A picture of the IBM 5218 can be seen here: http://www.welook4things.com/Update-04-08-10/album/slides/displaywriter_res… The IBM 5215 appears to be a variant of the usual IBM Selectric printer: http://www.jeffdwoskin.com/printers/img/character/selectric.jpg thanks.

11 years, 5 months

FPUIB: Amiga books/docs

by cisin＠xenosoft.com

Amiga ROM Kernel Reference Manual Libraries and Devices (AW) Amiga ROM Kernel Reference Manual Exec (AW) "The AmigaDOS Manual" (Bantam)Programmer's Guide To The Amiga" Sybex (TWO copies) Amiga Programmer's Handbook Sybex Amiga Programmer's Handbook Sybex VolumeII Amiga Disk Drives Inside & Out (Abacus) Amiga BASIC (Commodore) Amiga User's Guide Commodore) Large looseleaf Transformer docs Looseleaf Xerox of: Developer's Manual Looseleaf Xerox of: Hardware Manual Looseleaf Xerox of: Technical Reference Manual Looseleaf Xerox of: User's Manual Looseleaf Xerox of: ROM Kernel Manual -- Grumpy Ol' Fred cisin at xenosoft.com

11 years, 5 months

FS: DEC pdp-11/23

by js＠cimmeri.com

For sale, located in Harpers Ferry WV (near Frederick, MD) OR Washington, D.C. area: DEC pdp-11/23, circa 1981, in BA11-N with H9273 4x9 Q18/CD backplane, and with the often missing outer cover (shroud). Machine has been restored and tested. currently configured and tested as: (1) M8186 11/23 KDF11-A CPU (18 bit addressing) (2) M8044-DB MSV11 32KW RAM (16 bit) for 64KW total (1) M7940 DLV11 SLU (console) (1) M8012-YA BDV11 boot, term, roms (18 bit). also included, are likely working but untested are: M8013 -\ M8014 -- RLV11 RL01 drive controller (18 bit, DMA) M8029 -- RXV21 RX02 drive controller (18 bit, DMA) Please email me for more info. Thank you- -John Singleton

11 years, 5 months

FS: (1) DEC rack + (1) HP rack

by js＠cimmeri.com

For sale, located in Harpers Ferry WV (near Frederick, MD): (1) d|i|g|i|t|a|l decdatasystem industrial rack /with top, both sides, back, blue front (which for this rack is partial), and front control panel. measures approx 62" tall, 30" deep, 28" wide. has two stabilizer legs, four casters, and four glides. good shape that will respond well to cleanup. originally held (2) RL02 + (1) pdp-11/34 full height. mounting hardware included. (1) HP A4902A rack w/ top only (sides, back, and front pieces were excessive and gaudy) and measures 78" tall, 35" deep (top piece) or 29" deep (most of rack), and 22" wide. Ie. this is now a nice, very heavy duty open frame rack with a removable front (or rear) foot stabilizer and also a sliding stabilizer shelf. Two sliding HP shelves are included (not sure if useful). clean, excellent shape. mounting hardware included. Please email me for more info. Thanks, John Singleton

11 years, 5 months

PDP-11/34 verses a PDP-11/39

by lbickley＠bickleywest.com

When I saw Jack Rubin selling a PDP-11/34/39 manual on eBay, I had to buy it. I thought perhaps the "11/39" was just a misprint - but... The preliminary manual is titled "PDP-11/34/39 USER'S GUIDE" and is (c) 1975. Below the copyright is: "Written by PDP-11 Engineering". In perusing the manual, I quickly went to the section describing the two systems. Here's the opening paragraph in section 3.1: "PDP-11/34 AND PDP-11/39 SYSTEM DESCRIPTION" "The PDP-11/34 and PDP-11/39 Computer Systems consist of a set of modular building blocks combined to suit a customers needs. The PDP-11/34 System is designed for original equipment manufacturers [OEM's] while the PDP-11/39 system is designed for end users..." The manual then defines the "basic components" of each system. Both contain a KD11-E central processor, KY11-LA Operators Console, Unibus, M9302 Unibus Terminator and Core or MOS memory. The differences are: The 11/34 contains: M9301-YA Terminator/ROM The 11/39 contains: M9301-YB Terminator/Boot/Diagnostic DL11-W Serial Line Interface M7850 Parity Controller My guess is that DEC Marketing decided that only one system model made sense - and the original "11/34" configuration was scrapped and the "11/39" configuration became the 11/34 we know it... The manual also contains a number of hand written notes and corrections - and on first view looks to be substantially different than the "PDP-11/34 User's Guide" we 11/34 fans have come to appreciate. Cheers, Lyle -- Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

11 years, 5 months

Subject: Re: Blog IO9 "The History of Early Computing Machines"

by c.murray.mccullough＠gmail.com

It seems early history isn?t popular?anything before the Apple 1 or IBM PC is just not on the radar of computer or computer-like users today. Murray McCullough. Computer historian

11 years, 5 months

WYSE Terminal Bummer

by john＠yoyodyne-propulsion.net

Damn! A few weeks after rescue, my wonderful WYSE WY-55 terminal has developed a fault. My son noticed it first. He said, "that thing is making a horrible screeching noise!" I couldn't hear it. At 44 I must be deaf to that frequency. Anyway, after a while, the frequency came down to where I could hear it screeching... and I began to notice what looked like "ripple" on the display... ...the sound is now loud enough you wouldn't want to use it... and it mostly doesn't work anyway. Most of the time when you turn it on, the screen stays blank and the keyboard lights stay on continuously. My experience with old Mac monitors says flyback. Could it be caps? Darn! -- Yoyodyne Propulsion Systems: "The Future Begins Tomorrow" Visit us at: http://www.yoyodyne-propulsion.net -------- "Gregor Samsa awoke one morning to discover that he had been transformed into a giant cockroach." Nah, it's too good. --Max Bialystock

11 years, 5 months

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test-drb June 2013