Re: SQ703/6 conversion and a little fun
On Mon, Nov 1, 2021 at 4:23 AM Nigel Johnson Ham via cctalk wrote: > > A few months ago, thanks to help from several people here, I converted > an SQ703 TMSCP controller to SQ706 MSCP. > > .. > > It seems that one of the PALs is maybe setting up the address! > > Anybody else tried this? I never tried it with a Dilog SQ703 and SQ706. The two that I have have numerous differences between the boards, which made me skeptical that just a simple EPROM swap would be the only change necessary. However with the newer S-handle versions of the Dilog TMSCP SQ3703A and MSCP SQ3706A boards that I have, they appear identical except for the EPROMs. On those I did try swapping the EPROMs between the two boards and that did appear to completely swap them between TMSCP and MSCP functionality.
Re: SQ703/6 conversion and a little fun
No, Zane, it is made by Dilog. I heard that the device can do both tape and disk, but that to save money on DEC's royalty payments they only put the proms in for what you bought - which is not a problem since I got two of them! I figure if you can't beat it, go with the flow! I am going to move the Plessey DCV54 to 160340 and let the SQ706 play at 172150, even though its diagnostic says its at 174500! The reason I know it is coming up at 172150 is that the DCV54 diagnostic says there is a non-DCV54 controller there, only when the SQ703(6) is plugged in. Unfortunately there are other jobs I have to do first, including fixing a very noisy power contactor in a DEC power controller that is upsetting the wife, and the microvax seems to have a ground loop voltage that is preventing me from entering anything on the console channel since I installed the power converter! Cheers, Nigel Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.john...@ieee.org On 2021-11-01 1:40 p.m., Zane Healy wrote: > Who made the SQ703/SQ706? Is this a rebadge Viking board? If so then it’s > the PAL. > > I think that the OED needs to improve their definition of VAX. > > Zane > > > > >> On Nov 1, 2021, at 4:23 AM, Nigel Johnson Ham via cctalk >> wrote: >> >> A few months ago, thanks to help from several people here, I converted >> an SQ703 TMSCP controller to SQ706 MSCP. >> >> I had problems trying to use it on the vax due to the complexity of >> mapping Q-Bus registers under ODT, so put off trying until I got the >> LSI-11/73 going. >> >> Now I have a problem: It seems to run and recognise the controller as >> SQ706 according to the on-board diagnostics, however it insists saying >> it is at 777450, the TMSCP address. Trying to change it gives me an >> out-of-bounds message. >> >> OK, I thought, I will just use it there. >> >> Put it in to a running RT11 system and it shows up at 772150 and clashes >> with an existing controller! >> >> It seems that one of the PALs is maybe setting up the address! >> >> Anybody else tried this? >> >> cheers, >> >> Nigel >> >> Here's the fun: >> https://www(dot)bbc(dot)com/news/entertainment-arts-59089596 >> >> Maybe our vax computers will become popular once again! >> >> -- >> Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU >> Amateur Radio, the origin of the open-source concept! >> Skype: TILBURY2591 nw.john...@ieee.org >> >> >>
Re: 8" disk drive questions...
Just as a follow up, I grabbed one of the Memorex "flippies" out of my files: https://i.imgur.com/3VnrazS.jpg --Chuck
Re: Terminal Emulator for Android
On Sun, 31 Oct 2021, 20:37 Chuck Guzis via cctalk, wrote: > > On 10/31/21 1:06 PM, Douglas Taylor via cctalk wrote: > > I would like to use my tablet, Samsung Tab E model SM-T560NU, to connect > > to my VAX and Linux computers. There seem to be a large number of > > 'Apps' out there. What is a good one to use? > > > > The VAX doesn't have SSH only insecure TELNET. Another can of worms, > > SSH on the Vax? > > You might do what I do--isolate your vintage/old machines on their own > sub-net with no connection to the outside. It's not as if you'll do web > browsing on the VAX, after all. Was always a fan of links for web browsing on my VAXstation 90, I think I never got anything bigger than dillo or netsurf to run natively. Of course it also made a workable X display for Firefox from a bigger machine :-p. (this was not under VMS tho') As others have said JuiceSSH supports telnet which should be fine for VMS and ssh or even mosh for Linux or other 'nixes
Re: Mystery 1702A(?) EPROM Programmer
Reformed the big capacitors, tested the power supply, replaced all electrolytics on the control board (two were leaking) with hermetically sealed axial tantalums, and powered up on the variac today. Seems to be largely working at least for reads! Thanks, Jonathan ‐‐‐ Original Message ‐‐‐ On Sunday, October 31st, 2021 at 16:43, Jonathan Chapman via cctalk wrote: > There's a "Model 20..." on the silkscreen, but as luck would have it, the > roll-over standoff in the middle of the board goes through the rest of the > number! > > Thanks, > > Jonathan > > ‐‐‐ Original Message ‐‐‐ > > On Sunday, October 31st, 2021 at 09:03, Mike Douglas via cctalk > cctalk@classiccmp.org wrote: > > > It might be the Mikra-D MD-2040 1702 programmer. Similar to the MD-2044 on > > my website but a parallel data interface (e.g., manual switches and lights) > > instead of a serial RS-232 interface. The 2040 is briefly mentioned in the > > .pdf file here: https://deramp.com/downloads/eprom_p...kra-d/md-2044/ > > > > Mike
Re: Applesauce FDC
On 2021-11-01 16:35, Hagstrom, Paul wrote: > > There's a new Discord server that John started up for discussion and Q about the device and software, that might be the best place for quick answers The Discord invite is: > > https://discord.gg/YrQKdwNhdR > > (The link is also available in the upper right corner of https://applesaucefdc.com ) Ah never checked in the Contact section of the site so didn't see the discord. Guess it is time to learn about this new fangled discord thingy, seems like a new version of IRC... :) > > > As far as I know, you are are correct that there is no way to re-read only tracks that return non-green from the flux imager. I'm not sure if that's on the list of things to do or whether there might be a conceptual reason why that's not included in the flux imager. I think it reads a bunch of revolutions while it is sitting on the track, but one aspect of the "retry" feature of the fast disk imager that is nice is that you can take the disk ou t, clean the head and/or the media, and then put it back in and retry just the failing spots -- the several reads that the flux imager does are all on the same "visit" and don't let you leave, clean, and then return. It seems to me like that would be a nice feature to have in the flux imager too -- but unless it is very well hidden, I do not think it's there. Yeah I've found a few times where even just opening the drive door, re-inserting the disk and having it try just the bad sectors again made a difference. That is something I really liked and was looking for in the flux image settings. Then there are all the various options in the disk analyzer that I'm at a loss to see how to really use and have so far just ignored with no issues. > > > My understanding of the situation with protected disks from non-Apple-II platforms is that there haven't been a lot of people to test these out yet, so it's in its early stages but the more people try things and report what works and doesn't, the better it'll get. The software is under very active development, with new builds coming out sometimes daily. It's fairly mature now for Apple II disks, a lot of people have been using it a lot, but the other platform support (and PC drive connection) is quite new. Well the non-Apple II platform support was a surprise bonus for me when I received mine as I was mostly looking to deal with my Apple II collection. But I do have a lot of Atari disks as well as other platforms listed as working with the device so am now very interested in those. I've imaged a few others but not sure what is really protected and what isn't there. Most have worked just fine but a couple have had issues which I assumed is due to copy protection but I've just been using the fast image option as I didn't yet have a drive that could flux the 40 tracks of the Atari disks. Especially when the backs of some of the discs were used. Maybe if I could tell it to only flux one side of the disk instead of trying both as I am using a PC drive at the moment to image the Atari discs and those don't do flippy disks very well. Best, David Williams www.trailingedge.com
Re: Old Apple II game manuals and the Internet Archive
On 2021-11-01 16:31, Michael Mulhern wrote: > > > David, simple solution is to scan (to 600dpi tiff) the pages, and zip them and then change the *.zip to *.cbz (Comic Book Zip) and upload. You could add a simple cover page listing the titles. > > I've scanned a bunch (600dpi tiff) already and have also made PDFs of them so have both saved already. It wasn't a very long process. > > > > > The Book-op process on the IA will produce the downloadable PDF and online display page/images. > > > > I'd also be happy to also copy the zip/cbz you create and reload as individual metadata for each of the titles. > > > > I'm good with uploading each individually, just trying to see which is the preferred method. Individual or one big "searchable" zip. I have a lot of other similar photocopies of other doc as well that I'm looking to do besides all the game manuals. I WILL get the storage space all cleared out and my collection organized... I will... :) Best, David Williams www.trailingedge.com
Re: Applesauce FDC
There's a new Discord server that John started up for discussion and Q about the device and software, that might be the best place for quick answers. The Discord invite is: https://discord.gg/YrQKdwNhdR (The link is also available in the upper right corner of https://applesaucefdc.com ) There is a Slack channel in the apple2infinitum workspace where a lot of the same sort of discussion had been taking place before, but now that there are more platforms represented, John's expanded out to Discord as well so it's not embedded in an Apple-II-centered Slack workspace. As far as I know, you are are correct that there is no way to re-read only tracks that return non-green from the flux imager. I'm not sure if that's on the list of things to do or whether there might be a conceptual reason why that's not included in the flux imager. I think it reads a bunch of revolutions while it is sitting on the track, but one aspect of the "retry" feature of the fast disk imager that is nice is that you can take the disk out, clean the head and/or the media, and then put it back in and retry just the failing spots -- the several reads that the flux imager does are all on the same "visit" and don't let you leave, clean, and then return. It seems to me like that would be a nice feature to have in the flux imager too -- but unless it is very well hidden, I do not think it's there. My understanding of the situation with protected disks from non-Apple-II platforms is that there haven't been a lot of people to test these out yet, so it's in its early stages but the more people try things and report what works and doesn't, the better it'll get. The software is under very active development, with new builds coming out sometimes daily. It's fairly mature now for Apple II disks, a lot of people have been using it a lot, but the other platform support (and PC drive connection) is quite new. -Paul > On Nov 1, 2021, at 5:05 PM, David Williams via cctalk > wrote: > > I've recently picked up a new Applesauce floppy disk controller and have been > playing with attaching various different drive types and imaging different > Apple II, Atari, TI and other floppy disks with it. So far I've mostly imaged > unprotected disks and run them in various emulators just fine. I've since > added a sync sensor to one of my older Disk II drives and started to make > some flux images of protected disks. These too seem to run fine in the > emulators I've tried. The documentation on the device is limited at the > moment, particularly the software, and while it is slowly being updated I was > wondering if anyone else here had any experience with the setup. Any hints, > suggestions, best practices, "do this to get the best copy", etc, to pass > along would be appreciated. For example I read you can try to recover > borderline disks by having it do multiple passes of the bad sectors. I see > how this is done on the Fast Image option and has helped a couple of times > but don't see any way to do > > something similar via the Flux Image option. Does it not work/matter with > those? Also I see sometimes it reports a file as bad if I do one image type > but if I do the other it comes back as okay. So I tend to play with both when > I can. There is a lot of options and functions in the Flux Image option that > I just really don't know how it works or what to do with it so far that any > info would be great. I know it can image non-Apple II disks as well and I've > done a few. It works great on Apple II protected disks but wonder how to deal > with protected disks from other systems? Or is that more an issue of other > emulators and such not having something like the .woz format being used with > the Apple II? I bought this for my Apple II collection and it was a nice > surprise to learn it could work with other systems too, just looking for more > info about them as well. So far I really love the device and it has been > worth the long wait for new units to come back into production again. > Especially as it > > is a new design that allows for attaching PC floppy drives now as well. I've > noticed the doc on the site being updated, just hope that they can find time > to update more, particularly in regards to the client software. Best, David > Williams www.trailingedge.com (http://www.trailingedge.com)
SQ703/6 conversion and a little fun
A few months ago, thanks to help from several people here, I converted an SQ703 TMSCP controller to SQ706 MSCP. I had problems trying to use it on the vax due to the complexity of mapping Q-Bus registers under ODT, so put off trying until I got the LSI-11/73 going. Now I have a problem: It seems to run and recognise the controller as SQ706 according to the on-board diagnostics, however it insists saying it is at 777450, the TMSCP address. Trying to change it gives me an out-of-bounds message. OK, I thought, I will just use it there. Put it in to a running RT11 system and it shows up at 772150 and clashes with an existing controller! It seems that one of the PALs is maybe setting up the address! Anybody else tried this? cheers, Nigel Here's the fun: https://www(dot)bbc(dot)com/news/entertainment-arts-59089596 Maybe our vax computers will become popular once again! -- Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.john...@ieee.org
Re: Terminal Emulator for Android
On 11/1/2021 3:11 PM, Liam Proven via cctalk wrote: On Sun, 31 Oct 2021 at 22:07, Bill Degnan via cctalk wrote: Juicessh ap for android has telnet. I use it for my vax boxes. Seconded. I almost never use SSH from Android, but JuiceSSH is my go-to for the once-in-a-blue-moon occasion. I'm going to go with Juicessh then, sounds just what I need. Thanks. Having juicessh on my tablet will let me login to my machines on my home network while I lay in bed. You know, when you get that burning desire to test something out just before you go to sleep. Doug
Applesauce FDC
I've recently picked up a new Applesauce floppy disk controller and have been playing with attaching various different drive types and imaging different Apple II, Atari, TI and other floppy disks with it. So far I've mostly imaged unprotected disks and run them in various emulators just fine. I've since added a sync sensor to one of my older Disk II drives and started to make some flux images of protected disks. These too seem to run fine in the emulators I've tried. The documentation on the device is limited at the moment, particularly the software, and while it is slowly being updated I was wondering if anyone else here had any experience with the setup. Any hints, suggestions, best practices, "do this to get the best copy", etc, to pass along would be appreciated. For example I read you can try to recover borderline disks by having it do multiple passes of the bad sectors. I see how this is done on the Fast Image option and has helped a couple of times but don't see any way to do something similar via the Flux Image option. Does it not work/matter with those? Also I see sometimes it reports a file as bad if I do one image type but if I do the other it comes back as okay. So I tend to play with both when I can. There is a lot of options and functions in the Flux Image option that I just really don't know how it works or what to do with it so far that any info would be great. I know it can image non-Apple II disks as well and I've done a few. It works great on Apple II protected disks but wonder how to deal with protected disks from other systems? Or is that more an issue of other emulators and such not having something like the .woz format being used with the Apple II? I bought this for my Apple II collection and it was a nice surprise to learn it could work with other systems too, just looking for more info about them as well. So far I really love the device and it has been worth the long wait for new units to come back into production again. Especially as it is a new design that allows for attaching PC floppy drives now as well. I've noticed the doc on the site being updated, just hope that they can find time to update more, particularly in regards to the client software. Best, David Williams www.trailingedge.com (http://www.trailingedge.com)
Old Apple II game manuals and the Internet Archive
While clear out storage spaces I have come across binders of photocopies of lots of old Apple II game manuals. I've checked online for those that have been scanned already and will toss those. Before I toss the rest which I haven't found online, I'd like to scan them and upload to the Internet Archive to save them. Most of these are one page with a few 2-4 pages. What I'm wondering about is the best way to upload them after scanning. Do each individually, which adds a lot of entries to my small upload page (which I suppose isn't a big deal) or zip them up and upload the one file and make sure the metadata is properly set to identify each manual in the zip. Or some other method? Suggestions? Thanks, David Williams www.trailingedge.com (http://www.trailingedge.com)
Re: Terminal Emulator for Android
On Sun, 31 Oct 2021 at 22:07, Bill Degnan via cctalk wrote: > > Juicessh ap for android has telnet. I use it for my vax boxes. Seconded. I almost never use SSH from Android, but JuiceSSH is my go-to for the once-in-a-blue-moon occasion. -- Liam Proven ~ Profile: https://about.me/liamproven Email: lpro...@cix.co.uk ~ gMail/gTalk/FB: lpro...@gmail.com Twitter/LinkedIn: lproven ~ Skype: liamproven UK: (+44) 7939-087884 ~ Czech [+ WhatsApp/Telegram/Signal]: (+420) 702-829-053
Re: SQ703/6 conversion and a little fun
Who made the SQ703/SQ706? Is this a rebadge Viking board? If so then it’s the PAL. I think that the OED needs to improve their definition of VAX. Zane > On Nov 1, 2021, at 4:23 AM, Nigel Johnson Ham via cctalk > wrote: > > A few months ago, thanks to help from several people here, I converted > an SQ703 TMSCP controller to SQ706 MSCP. > > I had problems trying to use it on the vax due to the complexity of > mapping Q-Bus registers under ODT, so put off trying until I got the > LSI-11/73 going. > > Now I have a problem: It seems to run and recognise the controller as > SQ706 according to the on-board diagnostics, however it insists saying > it is at 777450, the TMSCP address. Trying to change it gives me an > out-of-bounds message. > > OK, I thought, I will just use it there. > > Put it in to a running RT11 system and it shows up at 772150 and clashes > with an existing controller! > > It seems that one of the PALs is maybe setting up the address! > > Anybody else tried this? > > cheers, > > Nigel > > Here's the fun: > https://www(dot)bbc(dot)com/news/entertainment-arts-59089596 > > Maybe our vax computers will become popular once again! > > -- > Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU > Amateur Radio, the origin of the open-source concept! > Skype: TILBURY2591 nw.john...@ieee.org > > >
Re: 8" disk drive questions...
On 11/1/21 8:24 AM, mike wrote: > I use a few Shugart 8" single sided drives on my cp/m 2.2 machine. How do > you make 'flippies'? > > Mike Zahorik Simple enough--Get yourself a hand punch like this one: https://www.swingline.com/c/punches/?rslt=34 Using an old floppy jacket (sans cookie), place it over the floppy you want to convert to a flippie. but invert it. Mark where the index aperture is on the disk to be converted. Do the same for the reverse side of the disk. Slip your punch between the jacket and cookie (using a piece of paper on the cookie to prevent damage, and punch the marked holes out on both sides. You'll wind up with a disk that has 2 index apertures in the jacket. You can now insert the disk, inverted in your single sided drive and use the other side. I'm a bit surprised that google doesn't turn up images of such floppies. I'll have to get a photo of one and post it somewhere. --Chuck
Re: Overclocked TI Silent 703 at 1200 bauds?
On Mon, 1 Nov 2021 01:05:45 -0700 Curious Marc via cctalk wrote: > Yes, I have ruined a few printouts using the isopropanol method ;-) . > On that subject, can anyone recommend a source for the thermal paper > used in the Silent? Marc > I found this link: https://www.adorablesupply.com/items/marine~navtex-recording-rolls/texas-instrument-thermal-printer-rolls-fax-ti-sln700-1-copy-1-detail.htm Old school TI vendors and repair services like https://www.omnidatasys.net/ or https://www.fastprinters.com/ might be able to refer you to a supplier if they don't still have the paper. If you measure the guide pins or the inner ID if you have a roll, if it's 1/2 inch, fax printer or Brother PocketJet rolls might work in a pinch. TI part numbers for the 100' roll is 0972603-0001, non-perforated, 0999415-0001 perforated.
RE: Overclocked TI Silent 703 at 1200 bauds?
Commodore Z (creator of the Cactus 6502 computer) seems to have a supply. He has provided me with several rolls. Bill Sudbrink -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Curious Marc via cctalk Sent: Monday, November 01, 2021 4:06 AM To: Tony Duell ; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Overclocked TI Silent 703 at 1200 bauds? Yes, I have ruined a few printouts using the isopropanol method ;-) . On that subject, can anyone recommend a source for the thermal paper used in the Silent? Marc > On Oct 31, 2021, at 9:36 PM, Tony Duell via cctalk > wrote: > > On Sun, Oct 31, 2021 at 11:40 PM Fred Cisin via cctalk > wrote: > >> The THERMAL paper that I used for the Silent 700s was "white" and >> very slowly changing to yellow or brown. Didn't hold up very well to >> heat and/or sunlight. > > Another thing that ruins thermal printouts is propan-2-ol (isopropyl > alcohol). It turn the paper black as if it has been heated. > > Since I normally have a can of said solvent on my bench for cleaning > disk drive heads, connectors, etc, I have to be careful if there's a > thermal printer about. > > -tony -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Re: 8" disk drive questions...
I'm not as familiar with 8" drives but in the 5.25" drives there were small punches you could buy that were designed to punch an additional index hole so single sided floppies could be used as flippies. I think it was Wangco that made a single sided drive that had dual write protect and dual index sensors so that you just turn the disk over rather than punching a hole. There were also some problems spinning cheaper floppies in the "wrong" direction when they were flipped. On 11/1/2021 10:24 AM, mike via cctalk wrote: I use a few Shugart 8" single sided drives on my cp/m 2.2 machine. How do you make 'flippies'? Mike Zahorik (414) 254-6768 -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis via cctalk Sent: Monday, November 01, 2021 12:34 AM To: Ali via cctalk Subject: Re: 8" disk drive questions... On 10/31/21 10:07 PM, Ali via cctalk wrote: "Computers that used the floppy index hole also required two additional openings in the floppy case to allow the drive to access when the disk was upside down. However, it was a difficult and risky operation for the integrity of the support. To facilitate this intervention, there were "guide masks" which allowed to accurately trace the position where the hole was to be made. These tools included the "Berkeley Microcomputer Flip-Jig" which was available for both 8 "and 5" 1/4 discs." Interesting. When I was using 8" disks early on, the only ones available were single-sided. However, several manufacturers produced "flippies' with labels on both sides. I still have several such examples in my stash. You'd think that a simple cardboard template would serve to allow users to mark additional hole locations, however. --Chuck
RE: 8" disk drive questions...
I use a few Shugart 8" single sided drives on my cp/m 2.2 machine. How do you make 'flippies'? Mike Zahorik (414) 254-6768 -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis via cctalk Sent: Monday, November 01, 2021 12:34 AM To: Ali via cctalk Subject: Re: 8" disk drive questions... On 10/31/21 10:07 PM, Ali via cctalk wrote: > "Computers that used the floppy index hole also required two additional > openings in the floppy case to allow the drive to access when the disk was > upside down. However, it was a difficult and risky operation for the > integrity of the support. To facilitate this intervention, there were "guide > masks" which allowed to accurately trace the position where the hole was to > be made. These tools included the "Berkeley Microcomputer Flip-Jig" which > was available for both 8 "and 5" 1/4 discs." Interesting. When I was using 8" disks early on, the only ones available were single-sided. However, several manufacturers produced "flippies' with labels on both sides. I still have several such examples in my stash. You'd think that a simple cardboard template would serve to allow users to mark additional hole locations, however. --Chuck
SQ703/6 conversion and a little fun
A few months ago, thanks to help from several people here, I converted an SQ703 TMSCP controller to SQ706 MSCP. I had problems trying to use it on the vax due to the complexity of mapping Q-Bus registers under ODT, so put off trying until I got the LSI-11/73 going. Now I have a problem: It seems to run and recognise the controller as SQ706 according to the on-board diagnostics, however it insists saying it is at 777450, the TMSCP address. Trying to change it gives me an out-of-bounds message. OK, I thought, I will just use it there. Put it in to a running RT11 system and it shows up at 772150 and clashes with an existing controller! It seems that one of the PALs is maybe setting up the address! Anybody else tried this? cheers, Nigel Here's the fun: https://www(dot)bbc(dot)com/news/entertainment-arts-59089596 Maybe our vax computers will become popular once again! -- Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.john...@ieee.org
Re: Overclocked TI Silent 703 at 1200 bauds?
Yes, I have ruined a few printouts using the isopropanol method ;-) . On that subject, can anyone recommend a source for the thermal paper used in the Silent? Marc > On Oct 31, 2021, at 9:36 PM, Tony Duell via cctalk > wrote: > > On Sun, Oct 31, 2021 at 11:40 PM Fred Cisin via cctalk > wrote: > >> The THERMAL paper that I used for the Silent 700s was "white" and very >> slowly changing to yellow or brown. Didn't hold up very well to heat >> and/or sunlight. > > Another thing that ruins thermal printouts is propan-2-ol (isopropyl > alcohol). It turn the paper black as if it has been heated. > > Since I normally have a can of said solvent on my bench for cleaning > disk drive heads, connectors, etc, I have to be careful if there's a > thermal printer about. > > -tony
