test-drb December 2006

test-drb@ccmp.vtda.org

225 participants
420 discussions

Looking for LC/Performa 550 mo'bo', 8*24*GC NuBus card

by spectre＠floodgap.com

I'm looking for a replacement Mac LC 550 (Performa 550, Color Classic II) motherboard. I'm also looking for an 8*24*GC NuBus video card. If you have either or both of these and are willing to part with/sell them, please let me know off list. Thanks! -- --------------------------------- personal: http://www.armory.com/~spectre/ --- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Ah, the insight of hindsight. -- Thurston N. Davis -------------------------

18 years

Wanted: Pertec-to-Qbus Tape Controller; RLV12 RL02 Controller

by vaxorcist＠googlemail.com

Help! I need a Pertec-to-QBus Tape Controller for my Cipher F880 tape drive. Any make & model will do: - DEC TSV05 controller M7196 - Emulex TC & QT series - Dilog DQ series - ... Furthermore I'd like to have an RLV12 RL02 Disk Controller (M8061). Will swap for other QBus boards or pay as much as a hobbyist can afford. Regards Ulli

18 years

F/S PDP-11/34 CAD$100 Local pickup only Kanata/ON/Canada

by root＠parse.com

Hi folks, I've decided that my PDP-11/34 is not part of my core collection, and that I really won't have time to do anything intelligent with it. Therefore, I'm selling it for CAD$100, local pickup in Kanata/ON/Canada only (will not ship). Pictures, module inventory, and contact info: www.parse.com/~museum/pdp11/pdp1134/index.html The pictured cabinet is available separately (CAD$100, same terms). (The Gandalf X.25 mux shown in the cabinet has been scrapped already.) Cheers, -RK -- Robert Krten, PARSE Software Devices, http://www.parse.com/resume.html Wanted: DEC minis: http://www.parse.com/~museum/admin/wanted.html

18 years

Machine Independent Storate Idea...

by tim.walls＠snowgoons.com

Jules Richardson wrote: > Maybe; but it's not vital to operation as the intention would be for the > primary storage to be something like a CF card or a USB stick. Although > that is interesting; the primary store is a USB stick then it's > presumably easy to code the firmware so that the device can be plugged > in via a cable to a system running suitable host software as an > alternative (providing the device holds sufficient local memory to > buffer a track and USB data transfer to the host is > fast enough to not upset whatever the floppy emulator's plugged in to). Unfortunately that's not true :-(. USB is a horrible standard, and it's not orthogonal - hosts are hosts, and targets (my word, I can't remember what the official word is) are targets. So, if your device wants to be able to use USB memory sticks, it needs to implement the USB host interface. That means it won't be able to talk to a computer (also a host interface.) If you want to do both, you'll need two interfaces (and strictly speaking two sockets - the flat socket (Type A IIRC) should only be implemented on a host, a target should only have the square Type B socket. It ought to be impossible to get a flat-4 male to flat-4 male USB cable, apart from anything else.) (By 'Flat 4' I mean the 'normal' USB socket people see on their computers. By 'Square', I mean the square one with two bevelled corners that you don't see as often (an awful lot of USB devices having captive cables.) You can probably find a driver chip that will implement both host and target though, or you may need two driver chips. The Philips PDIUSBD12 (again, IIRC that's the correct name) which is the only one I've ever used will only do target mode, IIRC. Firewire is a much nicer standard for this sort of thing, but of course defeats the object because noone makes Firewire memory sticks :-). Anyway, I'd definitely stick to CompactFlash, but make sure you implement a Type-II (IIRC, again!) interface, the physical size of which is slightly chunkier; that allows you to use the Microdrive harddisks as well as Flash cards. (To sort of answer one of your other questions, I regularly use 4GB CompactFlash hard disks in my digital camera - the only downside of them is they are sloooooooow, at least the cheapo ones I use. It used to be the cheapest way to get a 4GB compact flash hard disk was buy an iPod Mini, crack the thing open and steal the hard disk out of it - they use a CFlash disk internally!) Cheers, Tim -- Tim Walls at home in Leeds EMail & MSN: tim.walls at snowgoons.com

18 years

pdp-8 3 cycle data break?

by brad＠heeltoe.com

Are there any good *detailed* descriptions about how the 3 cycle data break works on say, a pdp-8/I with an rf08 or df32? I've read 3-4 simple descriptions, but I'd like something that relates - in detail - to the cpu instruction cycles/states (i.e. f0-3,d0-3,e0-3). I'm curious what the exact state machine looks like. I'm also curious if the data break cycles occur as additional cpu states or if they overlap cpu states in any way. I'm resisted diving into schematics mostly due to lazyness (and work), but that may be the next step. I guess I have no seen any good 8/i "principles of operations" either, outside what is said in "Computer Engineering". any pointers/comments appreciated. -brad

18 years

What would it take...

by chrism3667＠yahoo.com

to make one of these in discrete logic: (if you don't feel like looking, it's an Apple II IDE/Cflash controller) http://cgi.ebay.com/MicroDrive-IDE-Controller-for-Apple-IIe-IIgs_W0QQitemZ3… Just a rough chip count. ____________________________________________________________________________________ Cheap talk? Check out Yahoo! Messenger's low PC-to-Phone call rates. http://voice.yahoo.com

18 years

PDP11 adventures

by curtis＠hawkmountain.net

OK... so I'm now the new (proud :-) ) owner of a PDP-11/83. I'm new to the PDP11s, so, I'm not even powering this thing up until I get educated. This is the config In the system (183QA-D2) box: M8637-EF (2MB ECC RAM) M8190-AE (11/83 CPU, FPJ11-AA) X, M9047 (nothing, grant continuity) M7196 (TSV05 controller) M7555, M9047 (RQDX3 MFM Winchester/floppy, grant continuity) M7513, M9404 (RQDXE RQDX extender for RQDX2/3, Q22 extender cpu end) X (nothing) X (nothing) In the BA23-CA expansion: M9405-YB, M9047 (Q22 extender far end, grant continuity) M8053-MA (RS232/423 w/DDCMP) M3104 (8 line ASYNC multiplexer) M3104 (8 line ASYNC multiplexer) M77651, M7555 (DRV11-WA 18/22 bit dma general purpose parallel interface, RQDX3) M7651, M7546 (DRV11-WA, TKQ50-AA TMSCP for TK50 controller) X (nothing) X (nothing) I recieved this with 1 TK50 drive in the BA23, no hard drives (I have a decent selection of MFM drives, but if anyone has any spare Maxtor XT2190 or XT1140s let me know). Anyone got any DEC drive sleds ? I could use 4. Also have a 'port panel' that wen on the rear of the rack these two boxes were pulled from... and a large cache of ribbon cables to connect everything up. Now... for questions: is FPJ11-AA floating point, and does that mean my cpu card has that built in ? What is the max ram ? i.e. how many more M8637-EF (or higher capacity) cards can be aquired and put in ? Anyone have a TSV05 tape drive local to Sharon, MA ? Or, anyone in need of a TSV05 controller ? What is DDCMP control ROM ? that my M8053-MA has ? What is a DRV11-WA general purpose 18/22 bit parallel interface ? Can this be used for a parallel printer ??? As I'd like to have larger storage on it at some point, I'd like to locate a SCSI (or possibly ESDI ?) controller. What should I be looking for, anyone have one ? I'm looking at running BSD (2.11 ?) and other PDP11 OSes... suggestions ? There doesn't seem to be a reason to the layout of the grant continuity cards. Shouldn't there be one in the left side of the 3rd slot from the top in the 183QA-D2 (system unit) ? What is the minimum card config to start testing with ? Any pointers on how the RQDX3 and RQDXE cards should wire up ? The RQDXE in the system unit has a wide ribbon cable running to the front (which I presume breaks into the control/data wiring for an MFM drive there).. but the RQDX3 doesn't connect to the RQDXE .. Sorry for the long post... I'm new to PDP11... Oh.. last thing... does anyone local to Sharon, MA 02067 have a 'proper' DEC RAC enclosure the is 'correct'/'period' for a PDP-11/83 ? (not full size please... this 11/83 is in my 2nd floor computer room... I currently do not want a full height 19" rack in there... something deskside size plz). Thnk that covers it for now. Thanks in adance everyone, -- Curt

18 years

Help needed in identifying an early IC

by jack.rubin＠ameritech.net

I've come across a few old ICs and haven't been able to find out much about them - lots of places on the 'net are willing to sell them but I couldn't find a data sheet - only one clue that they _might_ be dual op-amps. They are small cans (TO-??) with eight leads protruding from the bottom, marked SG 1458T with a 1976 date code. Any help identifying them would be appreciated. Kind of hoping they're really some sort of shift register ... Thanks, Jack -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.9/573 - Release Date: 12/5/2006 4:07 PM

18 years

cctalk Digest, Vol 40, Issue 15

by ken＠seefried.com

From: "Ethan Dicks" <ethan.dicks at gmail.com> > Strictly speaking, DOS is not limiting your signalling speed, > but the ISA bus could be. For 100Mbps ethernet, yes. You can only push a fraction of the bandwidth. > There was one, only one, 100Mbps ISA card I ever > ran across (by 3Com, but I can't remember the model number) 3c515 Might not be the only one, though. According to Dan Kegals Fast Ethernet page (http://alumnus.caltech.edu/~dank/fe/) there's a rumor that Cogent and Olicom had ISA 100TX cards. I've never seen or heard of one in the wild. I distinctly recall there was a 100baseVG ISA card (I had a client who was bad at math who wanted to go VG so they wouldn't have to upgrade to PCI desktops). We all know how that turned out. I've also seen someone put a 100Mbps PCMCIA card in an ISA-PCMCIA bridge, but that's stretching the definition a bit.

18 years

PDP11 adventures

by oldcpu＠rogerwilco.org

On 6/12/06 01:45, "Zane H. Healy" <healyzh at aracnet.com> wrote: > >> At 8:08 PM +0000 12/5/06, Adrian Graham wrote: > >> >>> We have some RD53s to test for a customer..... >> > >> > >> You have my sympathy. > > Indeed, it looks like the original boot drive (also an RD53) long gave up > the ghost, which is a shame because it had RT11 5.4 and one of the > systems I wrote in the 1980's...... A microVAX II that I acquired earlier this year included a RD53/Micropolis drive. After reading various posts about these drives I had very low expectations for reviving it and hopefully discovering something interesting on it. And to make matters more dire, during the pickup, when hefting the BA123 box to load it into the truck, the drive+sled slipped out and fell to the concrete floor, probably about 14". So, with absolutely no positive expectations, after getting things ready for a quick drive dump by netbooting NetBSD and setting up a remote mount, I fired up the drives. Lo and behold, it worked! It spun up nicely, I heard the heads seek to 0 and all was good. Turned out that the drive only had a minimal Ultrix root filesystem, but I'm quite pleased that the drive still seems to work. I've fired it up many times since in the past 6 months with no problems. Here's a suggestion. Knock that drive hard! ;) If the problem is that the heads are 'stuck', it just might kick them off the stop. If the drive is considered dead, might be worth a try! J

18 years

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test-drb December 2006