Re: TRS-80 curiosity
On 4/13/2017 9:07 PM, Fred Cisin via cctalk wrote: >>> Model I Hard Disk Adapter (40 to 50 pin): >>> http://prof-80.fr/interface-hd-modele-1-n-26-1132 > On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote: >> Nope, it's none of those. > > Can you describe in what ways it differs? OK. I just opend the little plastic box. It isn't shown, but I assume the end of the cable is a female edge connector. Your other end is a male coming out of the box. I have cables on both ends both ending in female connectors. The PC board shows two resistors and two transistors. Mine has four resistors and two disk capacitors. Obviously not even similar. On another note, the box is labeled "To EI Screen Printer Port". Not sure what that means as the EI has a "Line Printer Card Edge" and not something specific to the Screen Printer. bill
Re: If C is so evil why is it so successful?
On Fri, Apr 14, 2017 at 12:23 AM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > On 04/13/2017 09:05 PM, Don North wrote: > > > I especially liked the Spanish language version of IITRAN: > > http://www.ak6dn.com/stuff/spantran.pdf > > > That does look like a TTY session. But the use of "hacer" (infinitive) > for "DO" is puzzling. I would have made it the imperitive "haga". > The usted form, eh? I would have thought computers would warrant tuteo... -- Eric Christopherson
RE: TRS-80 curiosity
-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Bill Gunshannon via cctalk Sent: Friday, April 14, 2017 8:32 AM To: cctalk@classiccmp.org Subject: Re: TRS-80 curiosity > On 4/13/2017 9:07 PM, Fred Cisin via cctalk wrote: >>> Model I Hard Disk Adapter (40 to 50 pin): >>> http://prof-80.fr/interface-hd-modele-1-n-26-1132 > On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote: >> Nope, it's none of those. > > Can you describe in what ways it differs? > On another note, the box is labeled "To EI Screen Printer Port". > Not sure what that means as the EI has a "Line Printer Card Edge" > and not something specific to the Screen Printer. Well, that explains it all then. http://www.trs-80.org/trs-80-screen-printer/ The screen printer connected to the expansion interface via a dedicated cable.
Re: If C is so evil why is it so successful?
On Fri, Apr 14, 2017 at 08:05:39AM -0500, Eric Christopherson via cctalk wrote: >> That does look like a TTY session. But the use of "hacer" (infinitive) >> for "DO" is puzzling. I would have made it the imperitive "haga". > >The usted form, eh? I would have thought computers would warrant tuteo... I've always wondered about this kind of thing. Haz for micros, haga for mainframes? John Wilson D Bit
Re: TRS-80 curiosity
On Apr 14, 2017, at 9:11 AM, Kelly Leavitt via cctalk wrote: > >> On another note, the box is labeled "To EI Screen Printer Port". >> Not sure what that means as the EI has a "Line Printer Card Edge" >> and not something specific to the Screen Printer. > > Well, that explains it all then. > > http://www.trs-80.org/trs-80-screen-printer/ > > The screen printer connected to the expansion interface via a dedicated > cable. The EI expansion port was originally called the Screen Printer port because that was the only accessory that connected directly to the TRS-80 bus. I’m not sure if this cable was for the Screen Printer as I always thought that was a straight through cable. But, the manuals do not indicate either way.
RE: TRS-80 curiosity
From: Camiel Vanderhoeven [camiel.vanderhoe...@vmssoftware.com] Does it look like the cable in this eBay listing: http://www.ebay.com/itm/Radio-Shack-TRS-80-Screen-Printer-26-1151-w-Sealed- Paper-Manual-EXTREMELY-RARE-/201867426619? _ Sorry, I didn't see any cable in that item. Just an extremely overpriced printer. Or should I say firestarter? bill
Re: TRS-80 curiosity
> On Apr 14, 2017, at 10:36 AM, Bill Gunshannon via cctalk > wrote > > Sorry, I didn't see any cable in that item. Just an extremely overpriced > printer. > > Or should I say firestarter? > > bill > Here's the pic of the cable http://imgur.com/UhvJ2Ed
Re: TRS-80 curiosity
On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote: The PC board shows two resistors and two transistors. Mine has four resistors and two disk capacitors. Obviously not even similar. Possibly very similar, Have you counted the pin numbers to determine which traces the parts are connected to? If the component resistors, transistors and capacitors perform compatible "buffering" functions, they may be functionally compatible. Both designs sound like kludges to deal with problems that surfaced when straight-through cables were used. If you count pins and identify the components, or take a picture, then Allison might be able to identify the details! On another note, the box is labeled "To EI Screen Printer Port". Not sure what that means as the EI has a "Line Printer Card Edge" and not something specific to the Screen Printer. That's due to a fluke in TRS-80 history. Even before the EI was available, RS had a "screen printer" that connected to the 40 pin expansion bus of the CPU. "To avoid confusion", and to avoid explaining what a bus was, RS therefore, called that 40 pin connector the "Screen Printer Port". http://www.trs-80.org/trs-80-screen-printer/ It sold for $599 (as much as the computer!) That continued to be available for a while after the EI came out. Owners of it "had to be" supported. The EI has a continuation of the 40 pin expansion bus. But, rather than try to explain it, RS simply showed them a picture of where the EI 40 pin expansion bus "continuation"/"output" connector was, and told them to plug their 40 pin screen printer into that connector. "To avoid confusion", and to avoid explaining what a bus was, RS therefore, called that 40 pin connector the "EI Screen Printer Port". Because RS had PROBLEMS with the EI, http://www.trs-80.org/radio-shack-expansion-interface/ they ended up coming out with multiple versions of the cabling, including the "Screen Printer" cable specifically including "buffered" cable with a box. I think that the screen printer cable was 40 pin to 40 pin? They also made a 40 pin to 34 pin adapter for connecting "Centronics style" printers to the CPU bus. It also would probably have been labelled "screen printer port", http://www.trs-80.org/printer-interface-cable/ One 50 pin to 40 pin adapter would be the one to connect the screen printer to the model 3. Insane thing to do, but we, the TRS-80 users, were rarely accused of sanity. Another 50 pin to 40 pin adapter would be Model 1 to hard disk. The connector on that for the model 1 would probably have been labeled "EI Screen Printer Port". All of these cables would have been easiest to build as a board with two gold-plated card-edge connectors, and then use female card-edge to female card-edge cables for connection (except 26-1401 female card-edge to "blue-ribbon" for "Centronics style" printers). But, RS cut corners and did not gold-plate the EI connectors! That came back to bite them on the ass (similarly to the way Apple's crappy sockets bit them), and therefore, rather than risk another card-edge bad connection, some of their stuff was made with attached cables, instead. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: APL and descendants - was Re: If C is so evil why is it so successful?
> On Apr 13, 2017, at 7:34 PM, Toby Thain via cctalk > wrote: > > On 2017-04-13 6:54 PM, Chuck Guzis via cctalk wrote: >> ... >> ...or that Iverson language, APL, present on the 5100 and what was >> probably one of the the first microcomputers, the MCM/70. >> >> So, whence APL today? > > Still lives on -- Dyalog, J, K, etc. Recently discovered the #jsoftware > channel on Freenode for APL fans. For that matter, APL itself also still exists, the OpenAPL open source implementation for example. Works nicely. paul
Re: TRS-80 curiosity
On Fri, 14 Apr 2017, Peter Cetinski via cctalk wrote: The EI expansion port was originally called the Screen Printer port because that was the only accessory that connected directly to the TRS-80 bus. Originally. Later, the Voice Output device (repackaged Votrax?) used the bus connector. Later, the Voice Input device used the bus connector. After we (Elcompco) built a 4 port "Bus Extender" (with active termination), we found that the Voice Input device had a hidden undocumented pass-through of the bus. All essential to connecting an X-10 interface and being able to say, "LET THERE BE LIGHT!", with a response of X-10 "all lights ON", and a voice responce of "BY YOUR COMMAND". Thus demonstrating the level of practical applicability of a home computer.
Re: APL and descendants - was Re: If C is so evil why is it so successful?
On 04/14/2017 08:09 AM, Paul Koning via cctalk wrote: > For that matter, APL itself also still exists, the OpenAPL open > source implementation for example. Works nicely. ...but reduced to a marginal language. I wonder if there's any JOVIAL still in use... --Chuck
Re: TRS-80 curiosity
> On Apr 14, 2017, at 11:15 AM, Fred Cisin via cctalk > wrote: > > On Fri, 14 Apr 2017, Peter Cetinski via cctalk wrote: >> The EI expansion port was originally called the Screen Printer port because >> that was the only accessory that connected directly to the TRS-80 bus. > > Originally. > > Later, the Voice Output device (repackaged Votrax?) used the bus connector. > Later, the Voice Input device used the bus connector. > Correct, originally. Lot’s of 3rd party devices that connected to the bus appeared soon thereafter. A few interesting ones I have other than the Voice Synthesizer and the Vox Box are an Exatron Stringy Floppy and a Cryptext hardware encryption device.
Re: TRS-80 curiosity
On Fri, 14 Apr 2017, Peter Cetinski wrote: Lot’s of 3rd party devices that connected to the bus appeared soon thereafter. A few interesting ones I have other than the Voice Synthesizer and the Vox Box Those were sold under the Radio Shack name. There were also some similar and better ones from third parties. are an Exatron Stringy Floppy and a Cryptext hardware encryption device. There was a software intensive third party expansion bus serial printer interface early on. It was supplanted by the TRS-232 (cassette port to serial printer!) (Not to be confused with numerous other products named "TRS-232") In Googling for it, I stumbled on http://ianmav.customer.netspace.net.au/trs80/ who makes a Model 1 to hard disk cable, a doubler, a CP/M "mapper", etc.
RE: TRS-80 curiosity
From: Peter Cetinski [p...@pski.net] Sent: Friday, April 14, 2017 10:46 AM To: Bill Gunshannon; General Discussion: On-Topic and Off-Topic Posts Subject: Re: TRS-80 curiosity On Apr 14, 2017, at 10:36 AM, Bill Gunshannon via cctalk mailto:cctalk@classiccmp.org>> wrote Sorry, I didn't see any cable in that item. Just an extremely overpriced printer. Or should I say firestarter? bill Here's the pic of the cable http://imgur.com/UhvJ2Ed _ That's it. I was pretty sure it wasn't for a hard disk. Now I know it's worthless. bill
RE: TRS-80 curiosity
From: cctalk [cctalk-boun...@classiccmp.org] on behalf of Fred Cisin via cctalk [cctalk@classiccmp.org] Sent: Friday, April 14, 2017 10:54 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: TRS-80 curiosity On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote: > The PC board shows two resistors and two transistors. Mine has > four resistors and two disk capacitors. > Obviously not even similar. Possibly very similar, Have you counted the pin numbers to determine which traces the parts are connected to? If the component resistors, transistors and capacitors perform compatible "buffering" functions, they may be functionally compatible. Both designs sound like kludges to deal with problems that surfaced when straight-through cables were used. If you count pins and identify the components, or take a picture, then Allison might be able to identify the details! > On another note, the box is labeled "To EI Screen Printer Port". > Not sure what that means as the EI has a "Line Printer Card Edge" > and not something specific to the Screen Printer. That's due to a fluke in TRS-80 history. Even before the EI was available, RS had a "screen printer" that connected to the 40 pin expansion bus of the CPU. "To avoid confusion", and to avoid explaining what a bus was, RS therefore, called that 40 pin connector the "Screen Printer Port". http://www.trs-80.org/trs-80-screen-printer/ It sold for $599 (as much as the computer!) That continued to be available for a while after the EI came out. Owners of it "had to be" supported. The EI has a continuation of the 40 pin expansion bus. But, rather than try to explain it, RS simply showed them a picture of where the EI 40 pin expansion bus "continuation"/"output" connector was, and told them to plug their 40 pin screen printer into that connector. "To avoid confusion", and to avoid explaining what a bus was, RS therefore, called that 40 pin connector the "EI Screen Printer Port". Because RS had PROBLEMS with the EI, http://www.trs-80.org/radio-shack-expansion-interface/ they ended up coming out with multiple versions of the cabling, including the "Screen Printer" cable specifically including "buffered" cable with a box. I think that the screen printer cable was 40 pin to 40 pin? They also made a 40 pin to 34 pin adapter for connecting "Centronics style" printers to the CPU bus. It also would probably have been labelled "screen printer port", http://www.trs-80.org/printer-interface-cable/ One 50 pin to 40 pin adapter would be the one to connect the screen printer to the model 3. Insane thing to do, but we, the TRS-80 users, were rarely accused of sanity. Another 50 pin to 40 pin adapter would be Model 1 to hard disk. The connector on that for the model 1 would probably have been labeled "EI Screen Printer Port". All of these cables would have been easiest to build as a board with two gold-plated card-edge connectors, and then use female card-edge to female card-edge cables for connection (except 26-1401 female card-edge to "blue-ribbon" for "Centronics style" printers). But, RS cut corners and did not gold-plate the EI connectors! That came back to bite them on the ass (similarly to the way Apple's crappy sockets bit them), and therefore, rather than risk another card-edge bad connection, some of their stuff was made with attached cables, instead. ___ Well, I don'c consider something passive (having only inert parts) to be similar to a device with active parts, but that's just my opinion. :-) Mine is 40 pin to 50 pin, definitely for the Model I and looks exactly like the Screen Printer cable in the last picture I was sent. I just cheked both the manual and looked at the E/I itself and the Line Printer Port is 34 pins and Centronics signals so no special cable there. I know that was the case on the Model 3 and Model 4. bill
RE: TRS-80 curiosity
On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote:
Well, I don'c consider something passive (having only inert parts) to be
similar to a device with active parts, but that's just my opinion. :-)
dissimilar designs can be done for functionally compatible systems.
Mine is 40 pin to 50 pin, definitely for the Model I and looks exactly like the
Screen Printer cable in the last picture I was sent.
Great!Curiousity assuaged.
I had thought that both ends of the Screen printer cable would be 40 pin,
That's why I had speculated on Model 3.
But I never spent $599 for one.
(instead, I struggled with interfacing a DTC-300 HyType 1 serial printer)
I just cheked both the manual and looked at the E/I itself and the Line
Printer Port is 34 pins and Centronics signals so no special cable there.
I know that was the case on the Model 3 and Model 4.
Yes, the model 1, 3, and 4 parallel printer ports ("Line Printer Port")
are essentially the same. If you examine the circuitry in the interfaces,
you might not think that they are "similar" :-)They all use the
#26-1401 printer cable (34 pin IDC card-edge to 36 pin "blue ribbon")
My homemade 34 pin to 50 pin cables for 8" drives (crimp with a couple of
wires moved) is functionally similar to D-Bit's FDADAP, but electrically
dissimilar, in that I don't implement TG43, when used in a read-only
situation. If that were to have been available at the time, it would
have saved me a lot of wasted time bread-boarding a totally unnecessary
"break-out".
DEC Alphaserver 1000 4/266
Hello all, I'm looking for a DEC Alphaserver 1000 4/266 CPU board. Andreas
Re: APL and descendants - was Re: If C is so evil why is it so successful?
To my knowledge, there is only one person that claims to have a cartridge for the APL on the VideoBrain. He considers it more valuable than gold and won't let anyone look at it or dump its contents. Such code running on a VideoBrain would surely warrant the /S label for "Small". Without some form of bank switching the resources of the VideoBrain are minimal. It has almost no RAM and the decoding has mirrored images through the address space. The F8 was clearly intended as an embedded controller similar to the Rockwell PPS4. Dwight From: cctalk on behalf of Eric Christopherson via cctalk Sent: Thursday, April 13, 2017 8:22:32 PM To: Jecel Assumpcao Jr. via cctalk Subject: Re: APL and descendants - was Re: If C is so evil why is it so successful? On Thu, Apr 13, 2017, Jecel Assumpcao Jr. via cctalk wrote: > Toby Thain via cctalk wrote on Thu, 13 Apr 2017 19:34:08 -0400 > > On 2017-04-13 6:54 PM, Chuck Guzis via cctalk wrote: > > > So, whence APL today? > > > > Still lives on -- Dyalog, J, K, etc. Recently discovered the #jsoftware > > channel on Freenode for APL fans. > > I consider Matlab and Julia to be spiritual descendents of APL. > > One thing that hurt APL in early microcomputers was that they used text > mode with the wrong font. I would also have guessed that Basic could > work better in really limited hardware, but some early APL > implementations were impressively frugal. The VideoBrain home computer had something called APL/S, but I can't find any information on how it differs from APL. Does anyone know? -- Eric Christopherson
Re: TRS-80 curiosity
On 15/04/2017, at 1:45 AM, Fred Cisin via cctalk wrote: > I had thought that both ends of the Screen printer cable would be 40 pin, > That's why I had speculated on Model 3. > But I never spent $599 for one. > (instead, I struggled with interfacing a DTC-300 HyType 1 serial printer) I never had a Screen Printer either, but I don't think it would even be possible to use with a Model III. I assumed the way it worked on the Model I was by either watching the CPU bus and sniffing writes to the video memory (mirroring to its own copy continuously), or reading the video memory when needed (trickier with synchronisation). Unfortunately, despite the Model III having 50 pins instead of 40, 25 of them were ground and A0-A7 of the address lines were exposed. Even that was only enabled for IO ports via software first. The Model I was much for flexible for add-ons. Scott.
Re: APL and descendants - was Re: If C is so evil why is it so successful?
At SMECC we have a very curious laptop with a little tape drive in it that seems to take small dictation size tapes. The little laptop has a rounded top to it. Mfr name on tip of tongue ... but ... It live in one of the Glass chasses .. wonder how scarce they are? only seen the one... Ed# In a message dated 4/14/2017 8:09:32 A.M. US Mountain Standard Time, cctalk@classiccmp.org writes: > On Apr 13, 2017, at 7:34 PM, Toby Thain via cctalk wrote: > > On 2017-04-13 6:54 PM, Chuck Guzis via cctalk wrote: >> ... >> ...or that Iverson language, APL, present on the 5100 and what was >> probably one of the the first microcomputers, the MCM/70. >> >> So, whence APL today? > > Still lives on -- Dyalog, J, K, etc. Recently discovered the #jsoftware channel on Freenode for APL fans. For that matter, APL itself also still exists, the OpenAPL open source implementation for example. Works nicely. paul
Re: APL and descendants - was Re: If C is so evil why is it so successful?
On 2017-04-14 5:02 PM, dwight via cctalk wrote: To my knowledge, there is only one person that claims to have a cartridge for the APL on the VideoBrain. He considers it more valuable than gold and won't let anyone look at it or dump its contents. I never understood this self-defeating attitude. What's supposed to happen when they pass on? --T Such code running on a VideoBrain would surely warrant the /S label for "Small". Without some form of bank switching the resources of the VideoBrain are minimal. It has almost no RAM and the decoding has mirrored images through the address space. The F8 was clearly intended as an embedded controller similar to the Rockwell PPS4. Dwight From: cctalk on behalf of Eric Christopherson via cctalk Sent: Thursday, April 13, 2017 8:22:32 PM To: Jecel Assumpcao Jr. via cctalk Subject: Re: APL and descendants - was Re: If C is so evil why is it so successful? On Thu, Apr 13, 2017, Jecel Assumpcao Jr. via cctalk wrote: Toby Thain via cctalk wrote on Thu, 13 Apr 2017 19:34:08 -0400 On 2017-04-13 6:54 PM, Chuck Guzis via cctalk wrote: So, whence APL today? Still lives on -- Dyalog, J, K, etc. Recently discovered the #jsoftware channel on Freenode for APL fans. I consider Matlab and Julia to be spiritual descendents of APL. One thing that hurt APL in early microcomputers was that they used text mode with the wrong font. I would also have guessed that Basic could work better in really limited hardware, but some early APL implementations were impressively frugal. The VideoBrain home computer had something called APL/S, but I can't find any information on how it differs from APL. Does anyone know? -- Eric Christopherson
Pass on (Was: APL and descendants - was Re: If C is so evil why
have a cartridge for the APL on the VideoBrain. He considers it more valuable than gold and won't let anyone look at it or dump its contents. On Fri, 14 Apr 2017, Toby Thain via cctalk wrote: I never understood this self-defeating attitude. What's supposed to happen when they pass on? Those handling the estate might make a good-faith effort to follow explicitly stated wishes. Then the rest of "that crap" gets dumpstered and sent to landfill. Stuff like that ridiculous "APL" game cartridge that won't even fit any current game machine. And ALL of those obsolete computers that won't even run Windows 10 NOR current Apple OS. Remember what happened to Don Maslin's projects? I've made a will, with a bunch of specific bequests. For the rest, . . . When I go, my sister will gladly let anybody who is willing to do a dump run have all of my stuff, if they act quickly. Otherwise, she will hire a hauling outfit that WILL work quickly. She will gripe long and loud about how much it costs and how long it takes to throw away all of my stuff. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: Pass on (Was: APL and descendants - was Re: If C is so evil why
On Apr 14, 2017 11:04 PM, "Fred Cisin via cctalk" wrote: >>> >>> have a cartridge for the APL on the VideoBrain. He considers it >>> more valuable than gold and won't let anyone look at it or >>> dump its contents. > > On Fri, 14 Apr 2017, Toby Thain via cctalk wrote: >> >> I never understood this self-defeating attitude. What's supposed to happen when they pass on? > > > Those handling the estate might make a good-faith effort to follow explicitly stated wishes. > Then the rest of "that crap" gets dumpstered and sent to landfill. > Stuff like that ridiculous "APL" game cartridge that won't even fit any current game machine. > And ALL of those obsolete computers that won't even run Windows 10 NOR current Apple OS. > > Remember what happened to Don Maslin's projects? > > I've made a will, with a bunch of specific bequests. For the rest, . . . When I go, my sister will gladly let anybody who is willing to do a dump run have all of my stuff, if they act quickly. Otherwise, she will hire a hauling outfit that WILL work quickly. She will gripe long and loud about how much it costs and how long it takes to throw away all of my stuff. > > > -- > Grumpy Ol' Fred ci...@xenosoft.com AM I correct, APL on my tektronix 4015? Bill Degnan twitter: billdeg vintagecomputer.net
Re: Pass on (Was: APL and descendants - was Re: If C is so evil why
On 4/14/2017 8:20 PM, william degnan via cctalk wrote: I've made a will, with a bunch of specific bequests. No will, but at this point, the wife knows who to call. Already trying to figure out how to get things into longer term collections if they will stay there, and not get ebay-ed immediately. Hope it is far into the future before that happens to any of us, but it happens.
Re: Pass on (Was: APL and descendants - was Re: If C is so evil why
I have a tiny APL that was written for the 8080 someplace. It has input that use ASCII keyboard input instead of the funny characters. I played with it a little on my IMSAI. The fellow had hand written and assembled it by hand. Not something I'd ever like to do. I make to many simple mistakes and I don't have any interest in erasure companies. Dwight From: cctalk on behalf of jim stephens via cctalk Sent: Friday, April 14, 2017 8:49:38 PM To: william degnan; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Pass on (Was: APL and descendants - was Re: If C is so evil why On 4/14/2017 8:20 PM, william degnan via cctalk wrote: > I've made a will, with a bunch of specific bequests. No will, but at this point, the wife knows who to call. Already trying to figure out how to get things into longer term collections if they will stay there, and not get ebay-ed immediately. Hope it is far into the future before that happens to any of us, but it happens.
Re: Pass on (Was: APL and descendants - was Re: If C is so evil why
On 04/14/2017 10:05 PM, dwight via cctalk wrote: > I have a tiny APL that was written for the 8080 someplace. Just curious, has anyone saved the MCM/70 APL code? --Chuck
Re: TRS-80 curiosity
On 4/14/17, 2:31 PM, "cctech on behalf of Bill Gunshannon via cctech" wrote: > >OK. I just opend the little plastic box. > >It isn't shown, but I assume the end of the cable is a female >edge connector. Your other end is a male coming out of the box. >I have cables on both ends both ending in female connectors. > >The PC board shows two resistors and two transistors. Mine has >four resistors and two disk capacitors. > >Obviously not even similar. > >On another note, the box is labeled "To EI Screen Printer Port". >Not sure what that means as the EI has a "Line Printer Card Edge" >and not something specific to the Screen Printer. > >Bill Does it look like the cable in this eBay listing: http://www.ebay.com/itm/Radio-Shack-TRS-80-Screen-Printer-26-1151-w-Sealed- Paper-Manual-EXTREMELY-RARE-/201867426619?
Harry Huskey, Bob Taylor -- sad news
Two computer industry pioneers died in the past week. Harry Huskey worked on ENIAC, the Pilot ACE, SWAC, and the Bendix G-15. He was also known for helping overseas universities start their CS programs. Harry was 101. Bob Taylor was an ARPAnet pioneer and Xerox PARC executive. He was 85. Evan Koblentz, director Vintage Computer Federation a 501(c)3 educational non-profit e...@vcfed.org (646) 546- www.vcfed.org facebook.com/vcfederation twitter.com/vcfederation
Re: APL and descendants - was Re: If C is so evil why is it so successful?
Love to have my Selectric in a desk APL terminal again. -pete On Fri, Apr 14, 2017 at 2:02 PM, dwight via cctalk wrote: > To my knowledge, there is only one person that claims to > > have a cartridge for the APL on the VideoBrain. He considers it > > more valuable than gold and won't let anyone look at it or > > dump its contents. > > Such code running on a VideoBrain would surely warrant the /S > > label for "Small". > > Without some form of bank switching the resources of the VideoBrain > > are minimal. > > It has almost no RAM and the decoding has mirrored images through > > the address space. > > The F8 was clearly intended as an embedded controller similar to > > the Rockwell PPS4. > > Dwight > > > > > From: cctalk on behalf of Eric > Christopherson via cctalk > Sent: Thursday, April 13, 2017 8:22:32 PM > To: Jecel Assumpcao Jr. via cctalk > Subject: Re: APL and descendants - was Re: If C is so evil why is it so > successful? > > On Thu, Apr 13, 2017, Jecel Assumpcao Jr. via cctalk wrote: > > Toby Thain via cctalk wrote on Thu, 13 Apr 2017 19:34:08 -0400 > > > On 2017-04-13 6:54 PM, Chuck Guzis via cctalk wrote: > > > > So, whence APL today? > > > > > > Still lives on -- Dyalog, J, K, etc. Recently discovered the #jsoftware > > > channel on Freenode for APL fans. > > > > I consider Matlab and Julia to be spiritual descendents of APL. > > > > One thing that hurt APL in early microcomputers was that they used text > > mode with the wrong font. I would also have guessed that Basic could > > work better in really limited hardware, but some early APL > > implementations were impressively frugal. > > The VideoBrain home computer had something called APL/S, but I can't > find any information on how it differs from APL. Does anyone know? > > -- > Eric Christopherson > >
Re: TRS-80 curiosity
On 4/14/17, 4:36 PM, "cctalk on behalf of Bill Gunshannon via cctalk" wrote: > > >From: Camiel Vanderhoeven [camiel.vanderhoe...@vmssoftware.com] > > >Does it look like the cable in this eBay listing: >http://www.ebay.com/itm/Radio-Shack-TRS-80-Screen-Printer-26-1151-w-Sealed >- >Paper-Manual-EXTREMELY-RARE-/201867426619? > >_ > >Sorry, I didn't see any cable in that item. Just an extremely overpriced >printer. > >Or should I say firestarter? > >bill Terribly overpriced, I agree. The cable is shown in the 4th photo (from the back of the printer)
