test-drb August 2016

test-drb@ccmp.vtda.org

175 participants
281 discussions

by vintagecomputer＠bettercomputing.net

Yes thankfully the previous owner labelled everything. ?The cards seem to be in great physical shape, however the motherboard does have a bit of corrosion here and there. PSU checked out ok in preliminary testing. The CPU card appears to be set up for Flex.. the expected jumper is cut and it looks like the 6810 onboard is bypassed. If I read Michael Holley's guide right that just means I need my first RAM board configured as '0'.. but that was the case already.. not sure why that would ever not be the case. Baud rate seems to be set correctly.. at least by the hand written label next to the dip switches on both cards. Sent from my Samsung device -------- Original message -------- From: william degnan <billdegnan at gmail.com> Date: 2016-08-04 5:19 AM (GMT-08:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: SWTPC 6800 On Aug 4, 2016 2:54 AM, "jim stephens" <jwsmail at jwsss.com> wrote: > > > > On 8/3/2016 10:58 PM, Brad H wrote: >> >>????? Thought I would post this here in case it reaches eyes my forum posts don't.? So I finally got my hands on a SWTPC 6800! >> This machine is chock full of boards.. 4 ram boards, the cpu card (with SWTBUG ROM), MP-S, MP-C serial cards, a floppy controller, some little custom board, a sound card.. etc. >> This presents some challenges obviously, since the machine has been altered from stock it could be tricky getting it running. >> Before I had it stripped down, I tried powering up as is (i pulled the older MP-C card and put MP-S in slot 1).? This produced little except for a string of random characters that would repeat every time I hit reset, exactly the same number. >> I tried stripping it down to CPU card, MP-S, and the RAM board designated as '0'.. but all I get at the terminal end is a single random character on power up. >> I then thought I'd try my luck putting the CPU card in my working MSI system (taking out its card).? Nope. >> Now, because my CPU card has been modified to accomodate SWTBUG and possibly something else, I'm not sure if it'll even work in a stripped down config.? Not sure about the interplay between boards. >> Anyway.. if anyone has any thoughts to point me in the right direction I'd be most appreciative.? Ultimately I'd like to get this beast working with my CT1024 terminals. >> Brad >> > I saw an SWTPC booth registered at VCF West, maybe you should drop by. I'll look in and see what they have and maybe they can help too. > > Only SWTPC gizmo I have is one of their audio amplifiers somewhere in the pile.? Picked up at TRW Swap Meet. > Thanks > jim You need to start with the power supply.?? Verify it's ok. Then work through each card's jumpers to see how they are set.? For example the MP-S has baud rate setting options, and the card can be used with a Teletype or RS232 terminal.? 1200 is max baud. If you're getting a consistent but garbled output to the screen did you confirm the baud rate you're using matches the MP-S jumpers? All of this is well documented online, Mike Holley has a step by step set up on his site.? A few years ago I retyped the entire code listing of TSC BASIC which can be downloaded into? bare bones SWTPC 6800

7 years, 11 months

RX02 rx-01 heathkit 8 inch drive for H-11 ( lsi11 heath case drive diff?)

by COURYHOUSE＠aol.com

link to area? or topic? Please? In a message dated 8/4/2016 12:00:45 A.M. US Mountain Standard Time, dave.g4ugm at gmail.com writes: There was some discussion on this on the VCFED forums. Might be worth a read. Dave > -----Original Message----- > From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Richard > Cini > Sent: 03 August 2016 11:51 > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > Subject: Re: RX02 rx-01 heathkit 8 inch drive for H-11 ( lsi11 heath case drive > diff?) > > Are you referring to having the H-27 drive from Heath? I don't know for sure > because I've never seen H27 docs, but the disk capacity is the same as the > RX01 (256k) and I think the interface was made deliberately incompatible, > likely at the behest of DEC. The version of RT-11 (called HT-11) supposedly > used a different floppy device driver. > > Again, this is based solely on what I've read from various places and not > direct experience (I have an H-11 with a SCSI controller; no floppy; and it runs > RT-11 no problem). > > Rich > > Sent from my iPhone > > > On Aug 3, 2016, at 1:40 AM, COURYHOUSE at aol.com wrote: > > > > we have a heath h11 which is lsi 11 aka pdp 11/03 > > > > the drives are not rx o1 or rx o2... but are they and the > > controller comparable? with rx01 or an rx02? > > > > Thanks Ed# at smecc

7 years, 11 months

VCF West tickets

by cctalk＠snarc.net

Pre-order ticket sales for VCF West end tomorrow at midnight ET. More available at the gate. https://t.co/kHKFAAn0TB

7 years, 11 months

Random stuff in Belgium

by jon＠jonworld.com

All, I was surfing our local website which is essentially "Belgian Craigslist" and found some vintage ads. I'm curious about this and too lazy to google on my own. It looks like these are Sony PCs with robot arms which can be controlled? http://www.2ememain.be/informatique-jeux-vid%C3%A9o/bureautique/286-et-plus… He's about 50-60km from me if someone wants/needs me to snag anything. If there is other stuff around here you're interested in, please let me know. -- -Jon +32 0 486 260 686

7 years, 11 months

RX02 rx-01 heathkit 8 inch drive for H-11 ( lsi11 heath case drive diff?)

by COURYHOUSE＠aol.com

we have a heath h11 which is lsi 11 aka pdp 11/03 the drives are not rx o1 or rx o2... but are they and the controller comparable? with rx01 or an rx02? Thanks Ed# at smecc

7 years, 11 months

HP 2100A Restoration

by perlpowers＠gmail.com

Hi, I recently acquired a pair of HP 2100A minicomputers locally for very cheap. Don't think I could get much more local that a guy literally at the end of my street. He bought them at an auction over ten years ago, never powered them on, and left them in his garage since. They've likely never been powered up since they were last in regular use. The units seem to be complete, apart from missing a few I/O cards that are written onto the top of the power supply. I don't plan to power them up until I've taken them apart, cleaned all the dirt and debris from them, and inspected the power supply. With regards to the power supply, I'm thinking my best bet would be to do a power on with no cards in the system. Though I'm not sure if all the power rails would even come up without a load on it, since it sounds like it may do some power sequencing from what I've read. I was wondering if anyone has some experience with testing a similar power supply that hasn't been run in at least 10 years? I'm not sure if using a variac to slowly warm up the supply and the caps would be wise on one of these power supplies. I'm not sure how the switching supplies would handle the low voltage at the start. The only I/O card that was installed in both machines, besides a terminator board in only one of them, is a serial interface made by some company with the logo CMC. It uses a COM2502 UART which I was surprised to find a datasheet for, however I haven't found any information on the card itself. I have a photo of the card in the album linked below if anyone has any information on it. I know this email is getting a bit long, but with regards to the memory both machines have a ID(16K) driver board, and two core modules. However one machine has both core modules marked 02100-60052 on the bridge, and the other has one marked 02100-60052 and the other 02100-60054. Is there any difference between these modules? I'd assume by the 16K driver in both, that all of the core modules are 8KW modules. Would that just be a later revision or is one a different size? I've taken some photos of the machines and put them here: https://goo.gl/photos/z2tGBbNvekwrxS5L9 I'll be taking more after I make some space to start taking the units apart for cleaning and inspection. I've also included photos of the serial numbers and other badges on the backs if anyone knows of a resource to decode them. I'd very much appreciate any help or suggestions that people have. I really want to get at least one of these machines back into full working order to have some fun programming with. Thanks, Hayden K.

7 years, 11 months

Irix 5.3 drivers

by pete＠dunnington.plus.com

I realise this is a bit of a long shot, but does anyone have the driver CD "GIO Fast Ethernet 1.0 for Irix 5.3 and 2.0 for Irix 6.2", SGI part number 812-0576-001? This is the drivers for SGI's own Fast Ethernet card, not the Phobos/3Com ones. -- Pete Pete Turnbull

7 years, 11 months

8 inch disks - help needed identifying format

by denise.devries＠flinders.edu.au

I am trying to preserve data from a selection of 8inch disks and the only information I have is some printouts which I believe to be HP CAT reports. The first couple of lines are as follows NAME PRO TYPE REC/FILE BYTES/REC ADDRESS H8,0,1 148 ALT-A DATA 1 1188 0/1/0 Can anyone answer the following questions? Is this an HP CAT report? What does the H8,0,1 mean? Is it likely that there are 1188 bytes/rec? What does the address 0/1/0 resolve to? Any information would be most welcome Denise de Vries ________________________________

7 years, 11 months

RX02 rx-01 heathkit 8 inch drive for H-11 ( lsi11 heath case drive diff?)

by COURYHOUSE＠aol.com

Rich - correct. That is the disc we have here. Just wondering in case We ever got a pdp-8 with disc interface or a standard unibus PDP 11 here at SMECC . We have an 11/20 but of course not much memory and no disc controller so it sits. Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 8/3/2016 3:51:20 A.M. US Mountain Standard Time, rich.cini at verizon.net writes: Are you referring to having the H-27 drive from Heath? I don't know for sure because I've never seen H27 docs, but the disk capacity is the same as the RX01 (256k) and I think the interface was made deliberately incompatible, likely at the behest of DEC. The version of RT-11 (called HT-11) supposedly used a different floppy device driver. Again, this is based solely on what I've read from various places and not direct experience (I have an H-11 with a SCSI controller; no floppy; and it runs RT-11 no problem). Rich Sent from my iPhone > On Aug 3, 2016, at 1:40 AM, COURYHOUSE at aol.com wrote: > > we have a heath h11 which is lsi 11 aka pdp 11/03 > > the drives are not rx o1 or rx o2... but are they and the controller > comparable? with rx01 or an rx02? > > Thanks Ed# at smecc

7 years, 11 months

Differences between the PDP-11/15 and PDP-11/20

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning > It would have to be a Unibus bridge type device, i.e., it terminates > the Unibus from the CPU, and at the other end originates a Unibus with > mapped addresses on it. Oh, right you are - I hadn't worked that out. (Probably because my head is still full of KT24 stuff, which doesn't have two totally separated busses. :-) > That assumes the KT11-B does only memory mapping, not the other things > that other MMUs do (user vs. kernel mode, I/D space .. ). I don't think it can; those would require hooks into the CPU, and there are no signs of such, in the pictures. Noel

7 years, 11 months

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test-drb August 2016