test-drb

test-drb@ccmp.vtda.org

101090 discussions

by snhirsch＠gmail.com

All, In my ongoing effort at clearing space, I must part with my beloved IBM RT-PC. This is a desktop form-factor with the "enhanced advanced CPU" (don't you love 80s marketing-speak) running at a stunning 16Mhz. with 8MB of memory on-board. I have upgraded it with a 1GB ATA drive and an Adaptec SCSI adapter and it's currently loaded with AOS / BSD 4.4. Has ethernet adapter and was in-use on my own network. Other items: - A bookshelf or two of documentation - One or two of every expansion card ever made for the unit - Extra mouse and keyboard (non-standard connectors) - Multi-Port serial card for POS systems (?) - Complete software distribution of AIX 2.x - Complete AOS / BSD 4.3 - The semi-mythical BSD 4.4 port w/ sources - A couple of ESDI drives (original hard disk) - The "academic" OS high-resolution grey-scale monitor w/ video adapter. This supports X10 R-something under AOS. And probably many, many other goodies that slipped my mind. I'm open to negotiation on price, but the kicker is: You Gotta Come And Get It. There's enough stuff to fill the back of a small van and I'm not even going to address shipment. I'm located in Burlington, VT. Please, someone give this a nice home? Steve --

16 years, 4 months

PDP-11/34A acquistion and questions -

by jack.rubin＠ameritech.net

I recently rescued the following system: One full size (H960)rack cabinet containing (from the top down) - DEC PDP-11 crest Telebyte TDX 1/2" tape drive PDP-11/34A w/ full programmer's console Data Systems Design (DSD) 880-120 homebrew connector panel Wesperline I/O unit One "corporate highboy" cabinet (VAX style) RLO2 drive BA11-KE chassis non-racked items - 2nd RLO2 drive DSD twin floppy system, 110/430 additionally - 8 disk packs + "pack rack" several boxes of 8" floppies, including an install set for RT-11 V5.1c, configured by Cambridge Digital, dated 1984 card inventory (by chassis slot) - - 11/34A (chassis marked 11/34A XX) (1) M8266 control module (KD11-EA) (2) M8265 datapath module (KD11-EA) (3) M8267 floating point (FP-11A) (4) M7859 programmer cons (KY11-LB) (5) M8268 cache board (KK11-A) (6) M7801 data word cntrl (MC11) [I think I must have misread the card number and this is really M7891, 128KW MOS RAM, but I haven't yet verified that] (9)<->(11) M9202 backplane jumper (12)DSD 808830 controller for DSD 880-120 (13)DILOG DU130 tape controller (14)M7865) SLU+RTC (DL11-W) - BA-11-KE (3) M7860 parallel I/O (DR11-C) (5)&(6) MSP-3/A, MSP-3/C Computer Design Assoc. boards (8) M7762 RL02 disk controller (RL11) (9)<->(11) M9202 backplane jumper (12)&(13) MDP-3/M CDA boards (includes 4 AMD 2903 SuperSlice chips) Pictures at: http://tinyurl.com/pdp1134a ************************* The system was apparently used for data logging and analysis in a windtunnel application. Questions: 1) Can anyone provide more info on the Computer Design Associates board sets? Each of the board sets is comprised of two boards in adjoining slots with ribbon cables across the board tops. I've emailed the researcher who used this system in the early '80s but haven't heard back from him yet. 2) Are there PDP8 device interfaces for either the DSD430 or DSD880? The 430 emulates a pair of RX02's; the 880 emulates an RX02 + RL02 and is capable of formatting floppy disks in stand-alone mode. From the bitsavers manuals, I see that there is a PDP8 interface (DSD 2131) for the 210 and 440 chassis, but it's not clear if there were similar interfaces for the other units or if the 2131 will support the 430 chassis. Thanks for any help, Jack

16 years, 4 months

Apple monitors

by brianlanning＠gmail.com

So it appears that not all apple monitors are created equal. I have a 17" apple monitor from a mac that I tried to attach to an Apple 2gs. They're all db-15, but this combo didn't work. Is it a frequency range thing? Is there an easy way to get this to work? The 9" 2gs monitor is a bit small. brian

16 years, 4 months

CNC/NC

by roger.holmes＠microspot.co.uk

> From: Ethan Dicks <ethan.dicks at gmail.com> > > <roger.holmes at microspot.co.uk> wrote: >> I wrote a similar program in 1979 to do a similar job with an Apple ][ europlus (to a Bridgeport Series 1). > > Oddly enough, one of my side projects is tracking down a problem with > the original controls for a Bridgeport Series 2. One of the control > cabinets got packed with sawdust from an adjacent woodshop, so it > appears to be power-supply related (all the motor driver and pre-amp > boards check out, but only X moves; Y and Z make noise but are > stationary). If I remember right the series 2 used stepper motors. One set of coils faulty? But on Y and Z seems strange. Maybe there's something in common for the coils of both axes. Rather less likely but the (woodruff?) drive keys could have sheared, but again on both axes at once seems unlikely. Do the motors turn or just go a tiny bit backward and forwards? Of course its possible one of the axes could have failed earlier and the machine used for simpler jobs. I once made a CNC program (prepared on the Apple 2) to machine elliptical valves (upside down poppet valves) and the program only used X and Y axes. Similar jobs must exist.

16 years, 4 months

Need Parts for DIGI-COMP1

by jthecman＠netscape.net

Happy Holidays to all I'am trying to restore a DIGI-COMP1 that I got off eBay awhile back and need the following items. It's missing 1-End Plate #2 (broken), 1-Clock Tube #16 or a way to make one, 3-Springs #17 and 1-Logic & Clock Rod #18. If anyone has these parts that want sale or give away please contact me off list. Thanks, John

16 years, 4 months

1Mx4 DRAM DIPs

by keithvz＠verizon.net

Hi, This is my annual 1Mx4 DRAM memory chip post. I'm looking for some old DRAM memory chips with the following specs: 20-pin DIP memory chips (16) 1meg x 4-bit dips make up a bank of 8mb. Should be 60-ns Fast Page Mode non-parity An example would be Toshiba TC514400AP-60. Other manufacturers might use the following base part numbers: Fujitsu MB : 814400 Goldstar GM : 71C4400 Hitachi HM : 514400 Hyundai HY : 514400 Micron MT : 4C4001 Mitsubishi M5M: 44400 I have some in surface mount (in a goofy 26/20 format), but without small PCBs to convert, they aren't much use. There are some out there in SOJ, also not useful. Yes, I know some old video cards might have them, and yes, I know the Epson ActionLaser 1500's have them. I haven't found a single source in a couple years. There are some companies, like usbid.com, that have them. All of these companies have $250-$500 minimum purchases, and I really don't need that many of them. Or want to pay that much. The form factor is important, but if I can only get EDO and 80ns, I'll take those too. :) Thanks and Merry Christmas. Keith

16 years, 4 months

Data General software agreement pre-announcement (Merry Christmas)

by shoppa＠trailing-edge.com

Bruce, My contribution, tapes I recovered and imaged in the mid-90's: http://www.trailing-edge.com/~shoppa/dg1.zip http://www.trailing-edge.com/~shoppa/dg2.zip Good luck with the big project! Tim.

16 years, 4 months

CNC/NC

by roger.holmes＠microspot.co.uk

> From: "Rick Bensene" <rickb at bensene.com> > > Earlier controls had RS-232 ports. I wrote a system on a PC running > FreeBSD Linux using Perl (a very early version) that would send and > receive programs to all of the controls in the shop over RS-232. I used > a SCSI terminal server box from Central Data that hooked up to the PC > over a SCSI channel, and provided 16 RS-232 serial ports that went out > to all of the machines. Amazingly enough, this thing is still in > service (in a shop environment) after over 15 years, providing an easy > way to load programs on some of the older controls. I wrote a similar program in 1979 to do a similar job with an Apple ][ europlus (to a Bridgeport Series 1). It was written in my own high level assembler (for the 6502) and worked with only one machine at a time and included Apple's word processor integrated in (by disassembly, converting to high level and inclusion in the source with suitable links) and we sold a normal version with it with permission from Apple.We also had a program which emulated a vertical mill and drew the programmed path on screen or on a pen plotter. I know they were in use about 20 years later but probably all dead by now. We also did a version which allowed operators to program a Heidenheim 131 or 145(?) controller on the Apple 2 without tying up the real machine which cost about 30 times as much as an Apple 2.

16 years, 4 months

DECmemory

by shoppa＠trailing-edge.com

Will writes: > What machine does the DEC 54-21139 SIMM go with? VAXstation or Alpha? > I have quite a pile - available cheap! It goes in at least some of the DEC 3000 Alphastations. Which themselves could use commodity PC-clone memory with parity (at least for the 8MB SIMM's, there's some special sensing resistor in the DEC 32MB SIMM's) so they would probably work in anything needing 8MB Parity SIMMs. Geeze, I haven't thought about DEC 3000 memory in a decade. IIRC the Alphastations shipped with 8MB SIMM's and these often were pulled and replaced with 32MB SIMM's. Tim.

16 years, 4 months

DDC BUS-65517 1553 card

by arlin＠gdca.com

Do you have any BUS-65517 cards. I have a system that I need some spares on. Arlin 925-784-4642

16 years, 4 months

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