test-drb July 2001

test-drb@ccmp.vtda.org

301 participants
824 discussions

by pete＠dunnington.u-net.com

On Jul 13, 20:23, Tony Duell wrote: > Over here, I'd recoment getting a BBC Micro. It's got one main > disadvantage compared to the Apple ][ -- no expansion slots. The plus > points are : [snip] I'll add the one point I'm surprised that Tony, of all people, missed :-) It's well documented; the circuit diagrams are readily available, the service manual is reasonably easy to find, and includes circuit description, upgrade instructions, schematics, board layouts, mechanical drawings, etc. And other documents cover the systems calls in detail, how to build interfaces to the bus, how to write ROM software for it, and so on. -- Pete Peter Turnbull Network Manager University of York

23 years, 5 months

Free to good home a franklin pc 8000

by ljcst18+＠pitt.edu

Hello everyone, I have this franklin pc 8000 computer. It works. If no one takes it i'll have to take it out back and beat it with a baseball bat. I'm in the pittsburgh area and I have to get it out storage at work. Luke

23 years, 5 months

Great new addition to collection

by jrkeys＠concentric.net

Picked 4 items from the 3m auction today 2 are not of age but must talk about them anyway. 1. mTi Accumcasure system 1000 2. Vibrace model 350 Flexible Disc tester type MDL TM-350 3. HP 9000 D Class with PA-RISC power, cdrom, tape backup and SCSI drive in nice HP rack 4. HP system rack with 7 SCSI SE drives and 2 tape backup units Also picked up the August 2001 issue of PCWorld and they have a 4 page article on the history of computing with pictures.

23 years, 5 months

Update: Re: MicroVAX equipment6

by Antonio.Carlini＠riverstonenet.com

> > I also picked up the DEC MicroServer (DEMSA-A)... > >Are you going to route X25 or SNA? Or DECnet? (Using the Phase IV load software he can do X.25 and DECnet simultaneously using the X25 Router software, should he so desire.) Antonio

23 years, 5 months

Strange device, stuff available FS or Trade

by ethan_dicks＠yahoo.com

--- Chuck McManis <cmcmanis(a)mcmanis.com> wrote: > Well the VAX fairy visited me and dropped off a "pile of junk". Inside the > junk were a couple of Unibus expansion bays and in those were a board from > MDB systems that asserts it connects a Unibus to a Q-bus. Unfortunately > I've only got the Unibus half apparently and there is a matching card that > plugs into the Q-bus. Univerter/Qniverter? Depending on what the docs say, would the Q-bus end be similar to what DEC used to connect BA-11N or BA-23 boxes together? It does kinda matter which way you are going (i.e., Unibus or Q-bus CPU)... mostly because the Unibus is 18-bit and the Q-bus is 18 or 22 bit (or 16 ;-) with completely different ideas about how to map space (which matters at the driver level, not the hardware level). We looked into such products at work, but we decided that the extra effort on the driver did not pay for saving a development box. > Apparently I also got a set of VAX 11/750 cpu cards and memory. Is this > something anyone is interested in? To rescue from oblivion, yes. To put to immediate use, no. I have two 11/750s and wouldn't mind spares, but space/cash is too tight for such an optional set of boards. I haven't even fired one up since I moved it to the Quonset hut. It sits, temporarily unloved, until I can wire a 30A Hubble receptacle for it. > Finally I got some docs on the VAX BI bus but I'm reserving those for Bill > if he wants them. If not, please let me know. I have an 8300. Thanks, -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Kick off your party with Yahoo! Invites. http://invites.yahoo.com/

23 years, 5 months

Mac Rom Debugger (was: Re: Apple II for into to microprocessors)

by tlindner＠ix.netcom.com

>>the early macs at least also have a built in ROM-Monitor :) >>probably the later ones too, although I think that they stopped >>including in the powermac series. > > My B/W G3 still has the programmer's switch on the front > panel and I believe that the G4's we have at work still do as well. > I don't recall if the iMac's do or not. When pressed, it still drops > you to the '>' prompt but none of the manuals that ship with the > machines tell you anything about it. I've never been able to exit > back out of it without rebooting, nor have I actually gotten it to > show any of the info one generally does from a monitor program. > > Jeff http://developer.apple.com/technotes/tn/tn1136.html Quote: About MicroBug MicroBug was first introduced with the Mac Plus and has been a standard component in the ROM of all Mac OS computers since then. MicroBug is invoked when the system takes a Non-Maskable Interrupt (NMI) and there is no other debugger (e.g., MacsBug) installed. ** I have been lurking here for about a month and am so excited I can finally contribute! :) -- tim lindner tlindner(a)ix.netcom.com "Life. Don't talk to me about life." - Marvin, the android

23 years, 5 months

Apple Recall of powerbooks

by fauradon＠mn.mediaone.net

Not ten year old yet but urgent... Seens like Apple is actively trying to eradicate the powerbooks 5300 and 190. The article at: http://www.pbzone.com/index.shtml#applestore States that apple will be destroying the PB that are sent back. Time to find those babies and protect them from doom. Francois

23 years, 5 months

Thoughts on a datascope

by dhquebbeman＠theestopinalgroup.com

> Any thoughts on how I can back this beastie up? Anyone > done anything with this line of datascope? No experience with this device, but you could try this: Remove the HD and attached it as the second drive in an old bootable PC that already has one MFM drive. You'll need to get the drive parameters for the drive entered into the CMOS; I think I used to use SpeedStor (?) for that. Other utilities exist. Then, assuming this datascope doesn't turn out to be an embedded DOS machine (and thus the drive formatted as FAT12), use DEBUG under DOS to load the boot sectors, then write to a .BIN file and set aside. Load the partition table (assuming it has one) and save it. Do a quick- n-dirty disassembly of the boot code to see where it runs off to (that is what it loads from the drive), and if it's loading less than 64k, you should be able to do this easily in DEBUG. If it's loading more than 64k, you could just write a quick-n-dirty program using your favorite language (unless that's COBOL!) to read the datascope code in and store it in a binary file. However, as I said above, you may find this machine is an embedded DOS machine, and the drive may already be readable, file by file. hth, -doug q

23 years, 5 months

DEC stuff free in Austin, TX

by mrbill＠mrbill.net

I've got two MicroVAX IIs (in the big BA123 cases) and a rackmountable (missing the rack mounts, unfortunately) horizontal-load 9track tape drive of some kind (havent had time to look at it yet) free for pickup in Austin, TX. All of this will fit in the back of a pickup truck or station wagon (was delivered in an old late-70s station wagon). bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

23 years, 5 months

Collecting vs. My Wife

by dittman＠dittman.net

My wife has grumbled a bit about my collecting, esp. when I use the loft in our house as a staging area. Most of the stuff is either in the computer room or the garage, but nothing beats being able to spread a system out on the floor and coffee table to either repair or build the system. I've recently decided to limit myself to VAX, PDP-11, and Alpha systems. I'm going to be selling off my CP/M and TRS-80 collection (except for my Cyzern System 7000 and possibly my very rare Norcom clone). When I mentioned this to my wife, I was extremely surprised when she said I should keep the stuff! I guess that's one of the reasons I love her so much; she supports my computing habit (she even bought me my first Alpha). -- Eric Dittman dittman(a)dittman.net

23 years, 5 months

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test-drb July 2001