test-drb

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101090 discussions

by spectre＠floodgap.com

For those of you not on vcfed, yes, this is a real, live Alpha Micro Eagle 300 with AlphaTCP serving you information on the unusual Alpha Micro 68K systems and their peculiar DEC-like operating system, AMOS. New in this iteration is a lot of link cleanup, some custodial edits and a number of new downloads, including a tool for browsing ISO 9660 CDs and even a Rogue/Nethack port! http://ampm.floodgap.com/ (And if you don't believe it's an Alpha Micro:) http://ampm.floodgap.com/cgi-bin/systat -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Bowl angry. ----------------------------------------------------------------

10 years

IO Selectric

by dave.g4ugm＠gmail.com

Folks I have today collect a recent E-Bay purchase. It appears to be an IO Selectric that has been left in a garage for a long period of time and is very gummed up. It will turn over with the manual handle, and it appears to try and type, but the carriage does not advance. All the tapes and chords appear to be in place. I have put some pictures here:- https://onedrive.live.com/redir?resid=277A0739F125010E!119461 <https://onedrive.live.com/redir?resid=277A0739F125010E!119461&authkey=!AGfg RGXKAjqDm7E&ithint=folder%2cJPG> &authkey=!AGfgRGXKAjqDm7E&ithint=folder%2cJPG sorry for the long link. Does anyone have any suggestions as to which manuals are appropriate, and which documentation was followed to allow it to be used as a printer? Dave Wade G4UGM

10 years

PS/2 luggables I noticed for sale in Denver

by swiftgriggs＠gmail.com

I saw some retro gear on CL today. 20Mhz 386 PS/2 lookin' thing http://denver.craigslist.org/sys/5589047344.html which is this: http://www.computinghistory.org.uk/det/30497/IBM-Model-8573-121/ And this one: http://denver.craigslist.org/sys/5589142407.html which is this: https://en.wikipedia.org/wiki/IBM_PC_Convertible I'm not an IBM nut (sorry, I worked there too long). However, they are cool machines. Someone might be interested. -Swift

10 years

Anyone with a Data General Eclipse S/230 out there?

by derschjo＠gmail.com

I just acquired a DG Eclipse S/230 in semi-decent condition. It's mostly complete with some fun peripherals in a gigantic rack. It'll be fun to get it going, but it's going to be a challenge -- the machine has been scavenged from here and there, I'm missing basic TTY I/O and controllers for the 8" floppy drive (and probably other things, too). Going over the boards, there's an IC on the "CPU 1" board that was somehow forcibly ripped from the PCB -- it looks like someone started clipping it off, then said "screw it" and yanked the thing off with pliers, leaving much of the leads leading up to the IC die. The PCB is undamaged, but I don't know what the IC is supposed to be. I suspect, based on what's surrounding it, that it's an SN74172J. The IC is located at position X3 (approximately, it covers more real estate than that). Anyone have a CPU 1 board from an S/230 they can check for me? There isn't much in the way of schematics for this that I can find... Thanks! Josh

10 years

Restoring an RXV21 and/or an RX02

by rodsmallwood52＠btinternet.com

In my quest for a working RX02 I'm trying to find out the best way of checking out an RXV21 and get it talking to the RX02. I have most of the standard diagnostics including XXDP. The setup is an 11/83 with an RX50 and RD53. (I can boot from either) In the box is MSV11-J PMI KDF11-B RXV21 RQDX3 They are in the order as above. The two dual height modules are in the right hand side of the back plane when viewed from the front. I am unsure as if there is a utility for RXV21 among all the diags I have or should I go in with ODT on a halted system and look at registers. With the setup above I need to get the RXV21 going in order to check out the RX02. The precise syntax of any commands is important because presuming I may have prior knowledge is not a good idea. I may have known this stuff in the past but I cant remember if I did or not!! Rod

10 years

Heathkit ETA-3400 vs. ETW-3400 confusion?

by tsw-cc＠johana.com

In following this thread, and taking in my "vast" Heathkit knowledge, I can only assume that the addition of a 'W' in the model number is to indicate a WIRED (at the factory) Heathkit. This may mean that the ETW-3400(a) is a wired version of the ET-3400(a). The difference that shows between the 'a' and non 'a' version is the space for four ram chips in the upper left visible corner of the PC board. The non-a version can have up to 4 ram chips (for a total of 512 bytes), but the a version has two 1024x4 chips, but only 512 bytes are available. Hope this answers some questions. (I have an ET3400-a version).

10 years

11/[9]4 latest

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood > I discovered the RX211 needed to be in CDEF and not ABCD. Is _that_ what it was? I'd have never figured that out in a million years! I'm utterly amazed you didn't fry it - I forget whether the slot you plugged it into was a MUD (hex) slot, or one of the SPC slots (I know the 11/84 backplane has some MUD and some SPC, but I don't know about the /94, and I'm too lazy to look) - but there are some odd voltages on various pins. > If you try to boot the RX02 in 11/84 mode you get > ... > Unexpected trap to location 114 Well, 0114 is the 'memory system error' vector - i.e. parity, or un-recoverable ECC error. I'm a bit surprised you're getting that, as I'd have assumed the boot ROMs test all the memory. I'm too lazy to read the 11/94 and J-11 manuals to see what the 11/94 has in the way of registers that record memory issues (the 11/73 has, for instance, a Memory System Error Register at 17777744), but that's the next step. > R6 = 172276 That seems a bit odd - the stack pointer is pointing into I/0 space? 772276 is the last Supervisor mode Data space PAR - maybe it's using those registers as a temporary stack? Noel

10 years

RXV21 and 11/94

by rodsmallwood52＠btinternet.com

Hi Having decided that the best way to get the 11/94 going was to sort out the RX02 and make sure I could boot from it. So back to the 11/83 make sure it boots of the RD53 - Yup RT11 Try the RX50 - Yup boots xxdp. Now then 11/83 - QBUS so an RXV21 to drive the RX02. But where to put it. Next to the RQDX3? After it? In front? Better ask: Knights of the most excellent order of Digital Techno Mages. Where does put ones RXV21 Next to the RQDX3? After it? In front? Rod Smallwood

10 years

Fully working Woz-signed straight Apple 2 + Lee F.-signed Sol-20 for auction

by cctalk＠snarc.net

Vintage Computer Federation is doing some fundraising. We're auctioning a fully working and Woz-autographed straight Apple II * and * a fully working and Felsenstein-autographed Processor Tech Sol-20. Both computers are SUPER-CLEAN. Apple II: http://www.ebay.com/itm/191890608380 Sol-20: http://www.ebay.com/itm/191890605553 We're using eBay to maximize the value since we're a non-profit. Have fun!

10 years

VAX-11/780 Board Set on eBait

by jnc＠mercury.lcs.mit.edu

Here: http://www.ebay.com/itm/282059544477 Low starting price. Noel

10 years

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