KDF 8189 processor board foobared (ebay warning)
I just ran across a sale on epay by a guy who thought you could pull the processor chip off the board and sell each in separate auctions. I couldn't find the processor from the huge number of gold scrap chip auctions he had, but he said it (or the other) chip(s) for the board were listed. I think giving him the benefit of the doubt, he thought that the two were separable like motherboards and processors are now day. Worst case he was just an unfortunate idiot that destroyed the board. I sent him an email telling him the value I place on it (tested) and suggested that he think of older boards as the full components to be kept together unless he wants to destroy the board, or knows what he is doing breaking them up. Of course on old Qbus and the like boards, one does have some components that are more valuable if you break up the board, and pull "unobtainium" chips. But pulling out the KDF processor isn't one of them in general. I just bought a KDJ Jaws chip for a "round 2it" project to try to get it running, as I archived a PDP11 "Hack" page indicating how to get one running on a proto board with minimal hardware. I don't know if you could do that with the KDF, but that isn't what this guy is doing. thanks Jim
Re: BBS software for the PDP 11
On Sat, May 20, 2017 at 02:01:12AM +, Bill Gunshannon via cctalk wrote: [...] > And if you break one you have to call HAZMAT. You did realize that, didn't > you? They contain mercury and any breakage requires professional remediation > by law!! That's an "alternative fact". The EPA gives some clean-up guidelines for CFLs: https://www.epa.gov/cfl/cleaning-broken-cfl The TL;DR is that you allow the (trivial amount of) mercury vapour to escape to the atmosphere, clean up the broken glass, and recycle the electronics as necessary. So just the same as any other domestic breakage, then. It'd be hilarious if it wasn't so tragic that the USA worries about less than 5mg of mercury in a CFL bulb, yet burns vast quantities of mercury-laced coal to power them. Also, none of this applies to LED lighting, which doesn't contain glass and can be dropped into the e-waste stream as-is when it fails.
Re: KDF 8189 processor board foobared (ebay warning)
> From: Jim Stephens > I just ran across a sale on epay by a guy who thought you could pull > the processor chip off the board and sell each in separate auctions. There are a lot of idiotz out there. I ran into one who'd removed a group of boards from (probably) an -11/40, and then scrapped away the rest of the machine (including an RK11-D backplane). I took _great_ pleasure in informing him that the stuff he'd scrapped had been worth several times what the boards he had 'saved' had been worth. Noel
Re: BBS software for the PDP 11
On 19 May 2017 at 21:39, jim stephens via cctalk wrote: > I have news for you. (maybe) From 1976 until it petered out, the phone time > cost a lot too. $200 or more a month at times. What does "phone time" mean in this context? I mean, POTS billing, for me, was always time-based, but the amount billed per unit time varied according to distance. AIUI, the UK system -- local calls cheapish, long-distance calls within the country more but not vast, international calls VERY expensive -- contrasted with the US system: local calls free, unlimited time, but long-distance calls within the country very expensive. Thus the development of various early telephony-over-the-Internet systems. I never used these at all until I had an international long-distance relationship. No real point inside the British Isles. > Also a stupid charge for local calls where the PUC's didn't stand up to the "PUC"? > Bell system or successors and call bullshit to the charges. Calling across a > few blocks could cost a lot and you wouldn't know it unless you were a phone > nut due to zone usage metering. I don't know what "zone usage metering" is either. > Only with competition in the mid 80s did US long distance start to fall, and > now with the internet and voice over IP have the need to pay for most such > long distance gone away for small users. Well, yes, for everyone. Now, in Europe, the problem is international mobile phone roaming. The EU is slowly forcing this out, but in return, now, the cost of roaming to non-EU countries is extortionate. > I put in a couple of T1 based systems for large offices though as recently > as 7 years ago, and commercially the POTS or digital carrier phone numbers > carry a huge toll. Wow... -- Liam Proven • Profile: https://about.me/liamproven Email: lpro...@cix.co.uk • Google Mail/Talk/Plus: lpro...@gmail.com Twitter/Facebook/Flickr: lproven • Skype/LinkedIn/AIM/Yahoo: liamproven UK: +44 7939-087884 • ČR/WhatsApp/Telegram/Signal: +420 702 829 053
Re: KDF 8189 processor board foobared (ebay warning)
- Original Message - From: "Noel Chiappa via cctalk" To: Cc: Sent: Saturday, May 20, 2017 9:12 AM Subject: Re: KDF 8189 processor board foobared (ebay warning) >> From: Jim Stephens > >> I just ran across a sale on epay by a guy who thought you could pull >> the processor chip off the board and sell each in separate auctions. > > There are a lot of idiotz out there. > > I ran into one who'd removed a group of boards from (probably) an -11/40, and > then scrapped away the rest of the machine (including an RK11-D backplane). > > I took _great_ pleasure in informing him that the stuff he'd scrapped had > been worth several times what the boards he had 'saved' had been worth. > > Noel - Be kind! Many years ago, before I discovered that people actually valued and collected this useless junk I bought a Northstar-in-a-desk at auction, threw the innards in the trash and kept the desk (now holding a stack of Cromemcos ;-). m
Re: KDF 8189 processor board foobared (ebay warning)
On 05/20/2017 04:59 AM, jim stephens via cctalk wrote: > I just ran across a sale on epay by a guy who thought you could pull > the processor chip off the board and sell each in separate auctions. > > I couldn't find the processor from the huge number of gold scrap chip > auctions he had, but he said it (or the other) chip(s) for the board > were listed. > > I think giving him the benefit of the doubt, he thought that the two > were separable like motherboards and processors are now day. Worst > case he was just an unfortunate idiot that destroyed the board. > > I sent him an email telling him the value I place on it (tested) and > suggested that he think of older boards as the full components to be > kept together unless he wants to destroy the board, or knows what he > is doing breaking them up. Of course on old Qbus and the like boards, > one does have some components that are more valuable if you break up > the board, and pull "unobtainium" chips. But pulling out the KDF > processor isn't one of them in general. > > I just bought a KDJ Jaws chip for a "round 2it" project to try to get > it running, as I archived a PDP11 "Hack" page indicating how to get > one running on a proto board with minimal hardware. > > I don't know if you could do that with the KDF, but that isn't what > this guy is doing. > Argh, CPU chips used on dec board loose value as the complete board carries the value. KDF with the second chip is useful but the logic needed to may a "CPU" of the raw chips is not trivial. Best chip for hacking and useful off a board (Falcon, KXT11, RQDX, others) is the T11. Its easily useful like a 8085 or Z80. Allison > thanks > Jim >
Re: Ethernet 1973/1974
The early ethernet schematics are best read with the a copy of the original patent (US 4,073,220) in hand. In particular, you can match up figure 5 and the explanation in the text with the schematic from Xerox. I wrote such a document decades ago but it has vanished along with many other bits. Has anyone interviewed Tat Lam about the transceiver?
Re: BBS software for the PDP 11
On Sat, May 20, 2017 at 7:42 AM, Liam Proven via cctalk < cctalk@classiccmp.org> wrote: > On 19 May 2017 at 21:39, jim stephens via cctalk > wrote: > > I have news for you. (maybe) From 1976 until it petered out, the phone > time > > cost a lot too. $200 or more a month at times. > > What does "phone time" mean in this context? > > I mean, POTS billing, for me, was always time-based, but the amount > billed per unit time varied according to distance. > > AIUI, the UK system -- local calls cheapish, long-distance calls > within the country more but not vast, international calls VERY > expensive -- contrasted with the US system: local calls free, > unlimited time, but long-distance calls within the country very > expensive. Thus the development of various early > telephony-over-the-Internet systems. I never used these at all until I > had an international long-distance relationship. No real point inside > the British Isles. Until the late 1990's or early 2000's, you paid per minute on long distance, but typically not for local calls. Now it's all flat rate, or almost flat rate no matter how much you use. > Also a stupid charge for local calls where the PUC's didn't stand up to > the > > "PUC"? Public Utilities Commission. That's the folks that in most states set the tariffs under which phone companies operated. The tariffs set the rates for long distance, what constitutes long distance, etc. > > > Bell system or successors and call bullshit to the charges. Calling > across a > > few blocks could cost a lot and you wouldn't know it unless you were a > phone > > nut due to zone usage metering. > > I don't know what "zone usage metering" is either. In the bay area in california, and likely elsewhere too, there was a local calling zone that was set based on the population patterns of the 1950's and 1960's. This meant that calls to some numbers were free, while others had a toll associated with them. There were zones around the central zone. So it would cost money to call out of your zone, even if things were only a few miles away. It was a total crock, but something that the PUCs allowed because it has always been allowed before the suburbs grew up into one contiguous population area. So fast forward to the 1980's or 1990's and you found it impossible to know how much a call would cost. In Colorado, I lived in an area just outside the metro calling area. I could call 20 miles away to the far side of Longmont for free. But calling 2 miles to the pizza joint was a long distance call because it was over the line in gunbarrel which was in the metro calling area. Totally insane and bat crazy. > > > Only with competition in the mid 80s did US long distance start to fall, > and > > now with the internet and voice over IP have the need to pay for most > such > > long distance gone away for small users. > > Well, yes, for everyone. > For everyone in major cities where there's competition. The picture is still F'd up in rural areas where there's only one phone company. > Now, in Europe, the problem is international mobile phone roaming. The > EU is slowly forcing this out, but in return, now, the cost of > roaming to non-EU countries is extortionate. > > > I put in a couple of T1 based systems for large offices though as > recently > > as 7 years ago, and commercially the POTS or digital carrier phone > numbers > > carry a huge toll. > > Wow Yea. It was a regulated monopoly here, and all kinds of crazy pricing things were in play to prop up a failing business model unable to compete with new technology Of course, there's still forces here in the US that are trying to leverage their failing telco business into a toll-gate on the internet, so time will tell... Warner
Re: Commercial AIM-65 Video Controller?
On May 19, 2017 10:46 PM, "dwight via cctalk" wrote: I don't believe the AIM-65 normally does color?? The AIM-65 normally does one color, which is red, on its alphanumeric LED displays.
Re: BBS software for the PDP 11
On 05/20/2017 11:12 AM, Warner Losh via cctalk wrote: > In the bay area in california, and likely elsewhere too, there was a local > calling zone that was set based on the population patterns of the 1950's > and 1960's. This meant that calls to some numbers were free, while others > had a toll associated with them. There were zones around the central zone. > So it would cost money to call out of your zone, even if things were only a > few miles away. It was a total crock, but something that the PUCs allowed > because it has always been allowed before the suburbs grew up into one > contiguous population area. So fast forward to the 1980's or 1990's and you > found it impossible to know how much a call would cost. In Colorado, I > lived in an area just outside the metro calling area. I could call 20 miles > away to the far side of Longmont for free. But calling 2 miles to the pizza > joint was a long distance call because it was over the line in gunbarrel > which was in the metro calling area. Totally insane and bat crazy. Yes--and in addition, if you were willing to pay a monthly subscription fee, you could add a city in the calling area that exempted you from metered service for that city. I remember doing this for Menlo Park. Not only that, but sometimes the tariffs were set up such that A's calls to B were free, but B's calls to A were toll. And things were even weirder when the destination was a non-AT&T carrier. GTE, for example, serviced Boulder Creek and Los Gatos. In the early days of BBS, one of the ways for a sysop to save money was to specify that a line was "answer only"--you couldn't dial out from it. I know of at least one case where Pacific Bell insisted that a modem on such a line constituted a "data line", for which there was a much higher charge. It was a wacky world. Even by 1990s, a lot of the RBOCs hadn't completely shed their habits. I learned from an installer that a service call to "check the line" was free, but one to "check equalization" was a substantial charge, even though the former usually included the latter. --Chuck --Chuck
Re: BBS software for the PDP 11
On 5/20/2017 6:42 AM, Liam Proven via cctalk wrote: On 19 May 2017 at 21:39, jim stephens via cctalk wrote: I have news for you. (maybe) From 1976 until it petered out, the phone time cost a lot too. $200 or more a month at times. What does "phone time" mean in this context? Long distance tolls vs. the zone usage mentioned below. Not a lot of variable vs. distance here, pretty much was so many cents / min. I mean, POTS billing, for me, was always time-based, but the amount billed per unit time varied according to distance. AIUI, the UK system -- local calls cheapish, long-distance calls within the country more but not vast, international calls VERY expensive -- contrasted with the US system: local calls free, unlimited time, but long-distance calls within the country very expensive. Thus the development of various early telephony-over-the-Internet systems. I never used these at all until I had an international long-distance relationship. No real point inside the British Isles. local calls were flat rate within zones from when i was born in the 60's. I do know you used to be able to pay per call, but I am not aware of anyone that had that measured billing in my family or associates. Just one relative who even had one of the old crank phones, but they could just take the mic off hook, and crank and have a call placed. Also a stupid charge for local calls where the PUC's didn't stand up to the "PUC"? Public Utility Commissions in every state control the billing structures. In some states, sanity wins over the utilities, but usually utilities bribe and engage in any tactic they can to pack them with sympathetic folks who allow them to charge all the can, and be totally unresponsive to any need to deliver product. Subject for a huge posting on an entirely different list. Bell system or successors and call bullshit to the charges. Calling across a few blocks could cost a lot and you wouldn't know it unless you were a phone nut due to zone usage metering. I don't know what "zone usage metering" is either. In local metropolitan areas, the phone companies will make up a grid of zones. They set a matrix of tolls between each. Calls are way over priced, and calling across some zones could cause 500' calls to cost as much as long distance calls. Where I grew up in the Kansas City, Mo area, the PUC (see above) in both Ks and Mo had gotten together to force the Bell system to create a single "free" zone across the entire 30 mile dia area with no zone charges in the early 60's. The tradeoff was they were given free reign in other nonsense in the states. But many areas had or still have this if you don't have a flat rate plan of some sort. Only with competition in the mid 80s did US long distance start to fall, and now with the internet and voice over IP have the need to pay for most such long distance gone away for small users. Well, yes, for everyone. Now, in Europe, the problem is international mobile phone roaming. The EU is slowly forcing this out, but in return, now, the cost of roaming to non-EU countries is extortionate. I have not made calls on any cell there, the few times I have traveled recently, but am aware. The place I see it is with my worldwide Vonage plan, with some coverage in some countries of all phones, and in some no cell, others no POTS. But for the same rate as I used to pay for US / Canada / Mexico, I now get global coverage with same cost / month, $27 or so. Send your Phone# I can call. I put in a couple of T1 based systems for large offices though as recently as 7 years ago, and commercially the POTS or digital carrier phone numbers carry a huge toll. Wow... Businesses still look like the bad old days for tolls. Also had several fights with the "hamsters" who would tack on "fees' for such as WWW advertising. The phone companies claim that you can sign up as a vendor and send arbitrary charges to be added to phone bills and it isn't their responsibility. Frontier, a carrier here as well as one of the third party service parasites here are total aholes about it. I had to file a complaint with the PUC here several times to force Pac Bell to take off charges to the company I'm referring to. Prior to me getting the billing to manage, they were paying about 800 / month for service. After revision, i got it cut in half by dumping crap like the above and other services that were useless. Companies who send their bills to accounting departments usually get screwed over badly because they don't know how or what to question. But on individual bills one usually notices crap so the third party folks have largely quit annoying them. BTW, the long distance here isn't "free" it is just flat rate for individuals. Most carriers have flat rate plans for businesses, but are quite a bit higher than for individuals. thanks jim
Re: KDF 8189 processor board foobared (ebay warning)
On 5/20/2017 7:49 AM, Mike Stein via cctalk wrote: - Original Message - From: "Noel Chiappa via cctalk" To: Cc: Sent: Saturday, May 20, 2017 9:12 AM Subject: Re: KDF 8189 processor board foobared (ebay warning) > From: Jim Stephens > I just ran across a sale on epay by a guy who thought you could pull > the processor chip off the board and sell each in separate auctions. There are a lot of idiotz out there. I ran into one who'd removed a group of boards from (probably) an -11/40, and then scrapped away the rest of the machine (including an RK11-D backplane). I took _great_ pleasure in informing him that the stuff he'd scrapped had been worth several times what the boards he had 'saved' had been worth. Noel - Be kind! Many years ago, before I discovered that people actually valued and collected this useless junk I bought a Northstar-in-a-desk at auction, threw the innards in the trash and kept the desk (now holding a stack of Cromemcos ;-). m The fellow responded and as I had suspected had never seen anything this old before and had thought that the parts were separable. He will be possibly re-combining them later. (I had figured he did not know it was not a case like PC's where the processors and MB's were routinely separated). I'm sending along the link and contact to some who PM'ed me as well. Also he is going to hopefully share photos of the entire pile and I'll try to help him market the parts in the most profitable way for him. I and the PM'er who will know who he is will hopefully rescue some stuff that way. Thanks jim
Re: KDF 8189 processor board foobared (ebay warning)
On 5/20/2017 7:01 AM, allison via cctalk wrote: Argh, CPU chips used on dec board loose value as the complete board carries the value. KDF with the second chip is useful but the logic needed to may a "CPU" of the raw chips is not trivial. That was what I figured. Hopefully the lister will put the two back together, but has not done so for now. he did bring down the price per my suggestion he had messed up the value by pulling the chip. Best chip for hacking and useful off a board (Falcon, KXT11, RQDX, others) is the T11. Its easily useful like a 8085 or Z80. I've got two boards with T-11's very nice. The T-11's listed right now were higher in cost than the KDJ processor I have, and I have a full page archived with the project to bring it up. Just seemed like an interesting project for sometime. Thanks Jim
Re: KDF 8189 processor board foobared (ebay warning)
On 5/20/2017 6:12 AM, Noel Chiappa via cctalk wrote: > From: Jim Stephens > I just ran across a sale on epay by a guy who thought you could pull > the processor chip off the board and sell each in separate auctions. There are a lot of idiotz out there. Turned out he had never encountered this situation and was just doing as he has done breaking down other scrap. Pull breakage one way, and keep motherboards and the like (per modern pc's) another. Hopefully he will share the other parts of the system and we can see what he got. Not sure how far down it is all been taken though. When pulling apart old stuff 90's test equipment, advertising scrap, and the like they make more than trying to treat everything like a museum artifact. The thing is do they keep doing it once you tell them. I think this guy will listen. we'll see. thanks Jim
Re: KDF 8189 processor board foobared (ebay warning)
Hi Jim, I have the M8189 11/23+ boards here. call me tonight if you want. Paul On Sat, May 20, 2017 at 4:59 PM, jim stephens via cctalk < cctalk@classiccmp.org> wrote: > > > On 5/20/2017 6:12 AM, Noel Chiappa via cctalk wrote: > >> > From: Jim Stephens >> >> > I just ran across a sale on epay by a guy who thought you could >> pull >> > the processor chip off the board and sell each in separate >> auctions. >> >> There are a lot of idiotz out there. >> > Turned out he had never encountered this situation and was just doing as > he has done breaking down other scrap. Pull breakage one way, and keep > motherboards and the like (per modern pc's) another. Hopefully he will > share the other parts of the system and we can see what he got. Not sure > how far down it is all been taken though. > > When pulling apart old stuff 90's test equipment, advertising scrap, and > the like they make more than trying to treat everything like a museum > artifact. The thing is do they keep doing it once you tell them. I think > this guy will listen. we'll see. > thanks > Jim >
Re: KDF 8189 processor board foobared (ebay warning)
On 5/20/2017 3:20 PM, Paul Anderson wrote: Hi Jim, I have the M8189 11/23+ boards here. call me tonight if you want. Paul Are there any reasonably priced boards with the processor and memory of either the KDF or KDJ processors? The ones I've seen recently are astronomically priced. Would be interesting to find one with memory, processor and console. Thanks jim Th
Re: KDF 8189 processor board foobared (ebay warning)
I don't remember the board numbers that came with the memory. If you have specific boards I'll try to check tonight. I seem to remember some lose J-11 chips somewhere- I'll try to find them. Thanks, Paul On Sat, May 20, 2017 at 5:40 PM, jim stephens via cctalk < cctalk@classiccmp.org> wrote: > > > On 5/20/2017 3:20 PM, Paul Anderson wrote: > >> Hi Jim, >> >> I have the M8189 11/23+ boards here. call me tonight if you want. >> >> Paul >> >> Are there any reasonably priced boards with the processor and memory of > either the KDF or KDJ processors? > > The ones I've seen recently are astronomically priced. Would be > interesting to find one with memory, processor and console. > > Thanks > jim > > > Th >
Announcing: VCF Midwest 12!
We did this nerd-fest thing at this hotel last year and no one complained (much), least of all the hotel, so I think we're up for another go. The TWELFTH edition of the Vintage Computer Festival Midwest is happening September 9th and 10th, 2017 in lovely Elk Grove Village, Illinois, mere minutes from O'Hare International Airport and an array suburban shopping and dining opportunities. Those who have joined us in the past will be happy to know that we're running the same show (and more!) this year: same location, same hours, still free to attend, show or sell. If you're new to VCF Midwest, you can find all the relevant details at http://vcfmw.org. If you have any questions not answered there, feel free to contact me directly. Registration: No registration is necessary to attend the show. If you would like a table(s) for exhibition and/or vending, please contact us via the form on our site at: http://vcfmw.org/signup.html. We'll do our best to get you the space you need. Presentation: If you would like to volunteer a talk or demo between 30-60 minutes, please contact us via the form http://vcfmw.org/pres.html. Our friendly events coordinator will get back to you soon. Accommodation: Hotel registration is now open! Follow the link here http://bit.ly/2phDUyI or at vcfmw.org and reserve your room at our reduced rate of $89/night. The nights of the 8th, 9th and 10th are available, with either a single King bed or a dual Queen room. If you're staying additional nights, they will probably have to be booked separately at the regular rate - however it's worth calling the hotel directly at (847) 437-6010 and asking them for the "Vintage Computer Fes" (yes without the "t") or "VIN" rate on the extra nights. No guarantees they'll extend it but it's worth a try. If you have any other booking needs or difficulties, please call that number as well. Do not call the main toll-free line for Holiday Inn/IHG. They don't have the rate code and won't be able to help you. Hesitation: Why wait? Book your room and travel and mark your calendars TODAY. Socialization: For Facebook users, there's a FB event here: https://www.facebook.com/events/805945506224113/ For the tweeting kind, you may follow us at: https://twitter.com/vcfmidwest Does anyone use Google+ any more? We have a page here: https://plus.google.com/u/0/b/102061024739945029100/102061024739945029100 Donation: VCF Midwest is a community-supported event, made possible through the generous donations of attendees, vendors and the organizing staff. As such, we humbly beg for your contribution toward the show's expenses, payable via the PayPal or GoFundMe links on our main page. Every donation helps and we appreciate them all. See you in September! -j
Re: Announcing: VCF Midwest 12!
Very cool! Wish we had one of these up here in Vancouver, BC. Sent from my Samsung device Original message From: Jason T via cctalk Date: 2017-05-20 6:05 PM (GMT-08:00) To: chiclassicc...@yahoogroups.com, "General Discussion: On-Topic and Off-Topic Posts" , The Rescue List Subject: Announcing: VCF Midwest 12! We did this nerd-fest thing at this hotel last year and no one complained (much), least of all the hotel, so I think we're up for another go. The TWELFTH edition of the Vintage Computer Festival Midwest is happening September 9th and 10th, 2017 in lovely Elk Grove Village, Illinois, mere minutes from O'Hare International Airport and an array suburban shopping and dining opportunities. Those who have joined us in the past will be happy to know that we're running the same show (and more!) this year: same location, same hours, still free to attend, show or sell. If you're new to VCF Midwest, you can find all the relevant details at http://vcfmw.org. If you have any questions not answered there, feel free to contact me directly. Registration: No registration is necessary to attend the show. If you would like a table(s) for exhibition and/or vending, please contact us via the form on our site at: http://vcfmw.org/signup.html. We'll do our best to get you the space you need. Presentation: If you would like to volunteer a talk or demo between 30-60 minutes, please contact us via the form http://vcfmw.org/pres.html. Our friendly events coordinator will get back to you soon. Accommodation: Hotel registration is now open! Follow the link here http://bit.ly/2phDUyI or at vcfmw.org and reserve your room at our reduced rate of $89/night. The nights of the 8th, 9th and 10th are available, with either a single King bed or a dual Queen room. If you're staying additional nights, they will probably have to be booked separately at the regular rate - however it's worth calling the hotel directly at (847) 437-6010 and asking them for the "Vintage Computer Fes" (yes without the "t") or "VIN" rate on the extra nights. No guarantees they'll extend it but it's worth a try. If you have any other booking needs or difficulties, please call that number as well. Do not call the main toll-free line for Holiday Inn/IHG. They don't have the rate code and won't be able to help you. Hesitation: Why wait? Book your room and travel and mark your calendars TODAY. Socialization: For Facebook users, there's a FB event here: https://www.facebook.com/events/805945506224113/ For the tweeting kind, you may follow us at: https://twitter.com/vcfmidwest Does anyone use Google+ any more? We have a page here: https://plus.google.com/u/0/b/102061024739945029100/102061024739945029100 Donation: VCF Midwest is a community-supported event, made possible through the generous donations of attendees, vendors and the organizing staff. As such, we humbly beg for your contribution toward the show's expenses, payable via the PayPal or GoFundMe links on our main page. Every donation helps and we appreciate them all. See you in September! -j
Re: KDF 8189 processor board foobared (ebay warning)
On 05/20/2017 05:56 PM, jim stephens wrote: > > > On 5/20/2017 7:01 AM, allison via cctalk wrote: >> Argh, CPU chips used on dec board loose value as the complete board >> carries the value. >> >> KDF with the second chip is useful but the logic needed to may a "CPU" >> of the raw chips is not trivial. > That was what I figured. Hopefully the lister will put the two back > together, but has not done so for now. he did bring down the price > per my suggestion he had messed up the value by pulling the chip. >> Best chip for hacking and useful off a board (Falcon, KXT11, RQDX, >> others) is the T11. Its easily >> useful like a 8085 or Z80. > I've got two boards with T-11's very nice. The T-11's listed right > now were higher in cost than the KDJ processor I have, and I have a > full page archived with the project to bring it up. Just seemed like > an interesting project for sometime. > The only boards with T11 I have are RQDX1/2/3. However I have a few T11s that were ES parts from my days at DEC and when the group moved they were going to trash them. Its an interesting part as its unique in that the bus width and processor cycles are configurable and that includes refresh if needed for Dram (Z280 can do it but it was years later).It was intended to be implemented like the z80 and 8085 for system applications that needed more. A projects archive for T11, I have to see that. Allison > Thanks > Jim
Re: KDF 8189 processor board foobared (ebay warning)
On Sun, May 21, 2017 at 3:08 AM, allison via cctalk wrote: > The only boards with T11 I have are RQDX1/2/3. However I have a few > T11s that were ES parts from As an aside, there's a T11 in the VT240 terminal. I am certainly not suggesting raiding such a terminal for the T11 chip though. I always thought it was a pity there was no way to run user programs on the VT240, unlike the GT40. That would have made an interesting 'PDP11' system. -tony
