I have a Tandon TM-848E 8" floppy drive which appears to have become a disk lathe. Or perhaps just an effective disk eraser. It's one half of an external dual 8" drive unit that I picked up off eBay several months ago. I've cleaned the heads, and I can't see any sharp spots or debris with my head-mounted magnifying lenses, but it continues to scrape rings in the oxide of a disk on both sides. I haven't tried removing the heads to put them under my microscope since that would destroy the alignment.
I've only tested it with the pair of disks that came in the drive so far. It's possible that they are bad disks with soft oxide, but I haven't seen the same scraping problem so far in the other drive of the pair. So, that one drive appears to be a disk lathe now. I haven't felt up to risking a potentially good disk in the bad one.
Have any of y'all seen this kind of problem before? Is it likely to be repairable, even if that involves removing the heads and then realigning the drive when I reinstall them? Or is it most likely that the drive is fine and I've just been putting bad disks in it? I don't have any alignment diskettes yet, but I may get some one of these days.
For the time being, I'm assuming that I'll just use the drive as a source of parts for other TM-848-series drives in my collection, like one that I have with a broken latch handle. The other drive plus the enclosure is earmarked for use with my KryoFlux.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/
I and others have been looking for a 98228A ROM for years, without luck. If you do manage to find one, please consider making it available to have the contents of the ROM read out so we can build new ROM modules! I'd love to use my 9885M with my 9825T. Thanks.
AppleDesign, M2980, qty 16
Keyboard II, M0487, qty 1
Extended II, M3501, qty 9 (some are MUCH heavier than others, and one has a
complete hard shell cover)
Also have new in pkg Apple cables
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
830-792-3400 phone
830-792-3404 fax
sales at elecplus.com
AOL IM elcpls
Hello,
i trie to copy a binary file with 6kw length from my Linux PC to a TU56
DECTape. The TU56 is connected via TD8E to the PDP-8. I work with 9k6.
Every time i try this, the transmission stops.
What id on PDP-8:
.R PIP
*DTA1:CHESS.BN<PTR:/B
^
then on Linux i send plain Chess file.
Do i need hardware flow controll on RS232? Any other helpfull hints?
Marco
I am trying to restore one to original functionality, but have never found or seen the original software provided with this computer.
If anyone has a list or the images, please let me know.
Thanks!
Kurt
> On Aug 16, 2014, at 1:00 PM, cctalk-request at classiccmp.org wrote:
>
> Send cctalk mailing list submissions to
> cctalk at classiccmp.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://www.classiccmp.org/mailman/listinfo/cctalk
> or, via email, send a message with subject or body 'help' to
> cctalk-request at classiccmp.org
>
> You can reach the person managing the list at
> cctalk-owner at classiccmp.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of cctalk digest..."
>
>
> Today's Topics:
>
> 1. Re: CRT Question - Old Calculator (Peter Corlett)
> 2. Displaywriter 8" filesystem? (David Schmidt)
> 3. Re: old Sun metal kbd is GONE! (Jerry Kemp)
> 4. Re: Disk for HP 9825B (Craig Ruff)
> 5. Re: PDP-8 and PIP (Rick Murphy)
> 6. Re: Displaywriter 8" filesystem? (Nigel Williams)
> 7. Re: PDP-8 and PIP (Michael Thompson)
> 8. Timex Sinclair (Electronics Plus)
> 9. standard 6502 syntax? (A. P. Garcia)
> 10. Re: Timex Sinclair (Alexandre Souza)
> 11. Re: Sun motherboard fuses (Glen Slick)
> 12. VT240 Monitor Error - 9 (Robert Jarratt)
> 13. Re: standard 6502 syntax? (Sean Caron)
> 14. Re: standard 6502 syntax? (Dave Caroline)
> 15. Re: CompuServe Magazine Scans (Sean Caron)
> 16. Re: standard 6502 syntax? (Sean Caron)
> 17. Re: standard 6502 syntax? (A. P. Garcia)
> 18. Re: VT240 Monitor Error - 9 (Mike Cesari)
> 19. Re: Disk for HP 9825B (Brian L. Stuart)
> 20. Re: standard 6502 syntax? (Ernest G. Allen)
> 21. Re: Displaywriter 8" filesystem? (Chuck Guzis)
> 22. Punched Cards (Dave G4UGM)
> 23. RE: VT240 Monitor Error - 9 (Robert Jarratt)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 16 Aug 2014 11:02:46 +0100
> From: Peter Corlett <abuse at cabal.org.uk>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: CRT Question - Old Calculator
> Message-ID: <20140816100246.GB25717 at mooli.org.uk>
> Content-Type: text/plain; charset=iso-8859-1
>
>> On Fri, Aug 15, 2014 at 02:43:50PM -0600, Eric Smith wrote:
>> [...]
>> I've also never gotten poor-quality cables with any of my AV gear, but then,
>> I only have purchased fairly reputable brands (e.g., Denon, Epson, Kenwood,
>> Marantz, Onkyo, Panasonic, Philips, Pioneer, Sony, Tascam/Teac). I don't
>> doubt that crappy (or no-name) brands might provide crappy cables, if they
>> bothered to provide any at all.
>
> Back in 2000, I bought a Pioneer amplifier and DVD player for roughly ?300
> each, so not exactly low-end kit. There were still crappy leads in the box.
>
> These things are really just starter cables to test the device works and which
> are expected to be replaced almost immediately, much like the dribble of ink or
> dusting of toner that comes with a new printer.
>
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 15 Aug 2014 13:24:20 -0400
> From: David Schmidt <david at attglobal.net>
> To: General Discussion: On-Topic Posts Only <cctech at classiccmp.org>
> Subject: Displaywriter 8" filesystem?
> Message-ID: <53EE4244.3040702 at attglobal.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> I've imaged a little stack of Displaywriter 8" disks and am starting in
> on filesystem organization. With an EBCDIC filter I can see the data
> plain as day. I've also got experience stitching together the
> DisplayWriter files that come from the DOS-based system, so if I could
> get the file allocation scheme figured out and lift off whole files from
> these disk images, I bet the same conversion code would work on the
> resulting data.
>
> I've browsed the manuals on Bitsavers, but of course IBM never intended
> their users to actually look at the bytes on the disk. So none of the
> information was geared towards revealing the file allocation secrets.
>
> Is there any reference material out there to help me decode (or find)
> the file allocation structures?
>
> - David
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 15 Aug 2014 12:34:40 -0500
> From: Jerry Kemp <other at oryx.cc>
> To: General Discussion: On-Topic Posts Only <cctech at classiccmp.org>
> Subject: Re: old Sun metal kbd is GONE!
> Message-ID: <53EE44B0.90502 at oryx.cc>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
>
>> On 08/13/14 04:48 PM, Jason T wrote:
>>> On Wed, Aug 13, 2014 at 4:01 PM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
>>>> On Wed, Aug 13, 2014 at 4:51 PM, Electronics Plus <sales at elecplus.com> wrote:
>>>> The old Sun kbd has been claimed.
>>>
>>> I didn't think that would take long. I don't have any Sun gear that
>>> old or I would have spoken up (my oldest is a 3/50 for which I still
>>> need to make a DA15-DIN8 adapter or find a sun3 kb).
>>
>> That model # doesn't turn up anywhere. Which model keyboard was this?
>> That part # says Sun-2 era or earlier to me.
>
>
> Who ever got the 540-1006-03 metal Sun keyboard, I know I would sure appreciate
> it if you could post a few pictures.
>
> My Yahoo-fu may be off today also, but I am unable to find any images of it either.
>
> Jerry
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 15 Aug 2014 16:48:15 -0600
> From: Craig Ruff <cruff at ruffspot.net>
> To: cctech at classiccmp.org
> Subject: Re: Disk for HP 9825B
> Message-ID: <26F0B123-1E37-409D-9861-AD68862523AC at ruffspot.net>
> Content-Type: text/plain; charset=us-ascii
>
> I and others have been looking for a 98228A ROM for years, without luck. If you do manage to find one, please consider making it available to have the contents of the ROM read out so we can build new ROM modules! I'd love to use my 9885M with my 9825T. Thanks.
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 15 Aug 2014 20:44:22 -0400
> From: Rick Murphy <rick at rickmurphy.net>
> To: Marco Rauhut <marco at familie-rauhut.eu>, General Discussion:
> Subject: Re: PDP-8 and PIP
> Message-ID: <201408160044.s7G0iUwK029252 at rickmurphy.net>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> At 12:37 PM 8/15/2014, Marco Rauhut wrote:
>> Hello,
>>
>> i trie to copy a binary file with 6kw length from my Linux PC to a
>> TU56 DECTape. The TU56 is connected via TD8E to the PDP-8. I work with
>> 9k6. Every time i try this, the transmission stops.
>>
>> What id on PDP-8:
>>
>> .R PIP
>> *DTA1:CHESS.BN<PTR:/B
>> ^
>>
>> then on Linux i send plain Chess file.
>>
>> Do i need hardware flow controll on RS232? Any other helpfull hints?
>
> You need some form of flow control, but getting to PDP-8 to signal
> ready is going to be interesting. What's the "PTR:" device in this
> case, the console input? If so, you may be able to use reader run as a
> CTS indicator somehow.
>
> What's happening here is that PIP fills a buffer, then initiates a
> write via the TD8E onto the tape. Until the TD8E driver gets done
> positioning and writing, PIP is no longer in control and there's
> nothing reading from the input device. You've got to figure out how to
> suspend feeding data until the device handler returns and allowing PIP
> to run. It doesn't matter what baud rate you use given that it can take
> minutes for a tape I/O to complete. You will lose characters.
>
> I've managed to make serial upload work with "echo control": send a
> character, wait until it's echoed before you send another. Agonizingly
> slow.
>
> I'd suggest looking into the Kermit-12 docs and uploadable files.
> There's a way to bootstrap yourself over a serial device to a working
> Kermit.
> -Rick
>
>
>
> ------------------------------
>
> Message: 6
> Date: Sat, 16 Aug 2014 21:50:44 +1000
> From: Nigel Williams <nw at retrocomputingtasmania.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: Displaywriter 8" filesystem?
> Message-ID:
> <CACCFpdwhwdSQ+9-RgDAqcrjTBmT3DnxMqstx3BQhHBWkvQ9M4g at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
>> On Sat, Aug 16, 2014 at 3:24 AM, David Schmidt <david at attglobal.net> wrote:
>> I've imaged a little stack of Displaywriter 8" disks and am starting in on
>> filesystem organization.
>
> Would you able to list the diskettes please so I can add to the public
> catalogue of known Displaywriter software.
>
>> Is there any reference material out there to help me decode (or find) the
>> file allocation structures?
>
> The "physical" layout is documented here:
>
> http://bitsavers.trailing-edge.com/pdf/ibm/floppy/GA21-9182-5_Diskette_Gene…
>
> and there are other versions of the document in the same directory.
> The DW logical structure more or less follows the physical layout,
> however there are new filetypes and extensions. I was planning to
> return to building a decoder once I had additional images to work with
> so it would be easier to triangulate the DW specifics.
>
>
> ------------------------------
>
> Message: 7
> Date: Sat, 16 Aug 2014 08:44:39 -0400
> From: Michael Thompson <michael.99.thompson at gmail.com>
> To: cctech <cctech at classiccmp.org>
> Subject: Re: PDP-8 and PIP
> Message-ID:
> <CAH1BU=-DYUdv+x+WA_=fNxrEU7Xdv6+KGerEbH7iW5RHggjKdQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
>>
>> From: Marco Rauhut <marco at familie-rauhut.eu>
>> Date: Fri, 15 Aug 2014 18:37:57 +0200
>> Hello,
>>
>> i trie to copy a binary file with 6kw length from my Linux PC to a TU56
>> DECTape. The TU56 is connected via TD8E to the PDP-8. I work with 9k6.
>> Every time i try this, the transmission stops.
>>
>> What id on PDP-8:
>>
>> .R PIP
>> *DTA1:CHESS.BN<PTR:/B
>> ^
>>
>> then on Linux i send plain Chess file.
>>
>> Do i need hardware flow controll on RS232? Any other helpfull hints?
>>
>> Marco
>
> When we tried something similar on an 8/I, and it also failed. It worked OK
> after we connected the reader relay logic on the console to RTS/CTS on the
> PC and enabled flow control.
>
> You could make an image of the DECtape using SIMH and then use David
> Gesswein's resttd8e. One part of the program runs on the PDP-8, and one
> part runs on the PC. No hardware flow control is needed.
> ftp://ftp.pdp8online.com/software/dumprest
>
> --
> Michael Thompson
>
>
> ------------------------------
>
> Message: 8
> Date: Sat, 16 Aug 2014 08:12:22 -0500
> From: "Electronics Plus" <sales at elecplus.com>
> To: "'General Discussion: On-Topic and Off-Topic Posts'"
> <cctalk at classiccmp.org>
> Subject: Timex Sinclair
> Message-ID: <002001cfb953$b74c0370$25e40a50$@com>
> Content-Type: text/plain; charset="us-ascii"
>
> Who asked for the Timex Sinclair computer and RAM module?
>
>
>
> Cindy Croxton
>
> Electronics Plus
>
> 1613 Water Street
>
> Kerrville, TX 78028
>
> 830-792-3400 phone
>
> 830-792-3404 fax
>
> sales at elecplus.com
>
> AOL IM elcpls
>
>
>
>
>
> ------------------------------
>
> Message: 9
> Date: Sat, 16 Aug 2014 08:45:44 -0500
> From: "A. P. Garcia" <a.phillip.garcia at gmail.com>
> To: cctalk at classiccmp.org
> Subject: standard 6502 syntax?
> Message-ID:
> <CAFCBnZsMZVR9jf3+NT0++tbrYOY-y5zmXU6ELy+=u-pNvqXRsQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Was there more or less a standard or reference 6502 assembly language (e.g.
> from MOS) with regard to syntax and pseudo ops? With the cpu being used in
> so many different computers, and so many vendors writing their own
> assemblers for each platform, did the assemblers tend to resemble each
> other (besides the instruction set), or did everyone tend to do their own
> thing?
>
>
> ------------------------------
>
> Message: 10
> Date: Sat, 16 Aug 2014 11:00:51 -0300
> From: Alexandre Souza <alexandre.tabajara at gmail.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: Timex Sinclair
> Message-ID:
> <CANdZFKTBE3-_-CQErBmSHoRnF86BGuzq3YbaH8x5ZZaVMqYubA at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Me!
>
> enviado do meu telemovel
> Em 16/08/2014 10:16, "Electronics Plus" <sales at elecplus.com> escreveu:
>
>> Who asked for the Timex Sinclair computer and RAM module?
>>
>>
>>
>> Cindy Croxton
>>
>> Electronics Plus
>>
>> 1613 Water Street
>>
>> Kerrville, TX 78028
>>
>> 830-792-3400 phone
>>
>> 830-792-3404 fax
>>
>> sales at elecplus.com
>>
>> AOL IM elcpls
>
>
> ------------------------------
>
> Message: 11
> Date: Sat, 16 Aug 2014 07:07:39 -0700
> From: Glen Slick <glen.slick at gmail.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: Sun motherboard fuses
> Message-ID:
> <CAM2UOwL_cTvgTUt-0Z_Nm67oLPma9AfkTtq1u3abST-Mc7DSMQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
>> On Aug 16, 2014 12:00 AM, "Kurt Nowak" <knowak at alumni.calpoly.edu> wrote:
>>
>> Actually my eyes are bad...its 125V not 12.5V! (2A) :) Mouser has 'em:
>> Mouser P/N 576-0274002.V They aren't cheap and they're back ordered.
>
> Does it have to be the 274 instead of the 273 version? Looks like the 274
> is the mil spec version and the 273 is the commercial version.
>
> The 0273002.H is half the price at Mouser.
>
>
> ------------------------------
>
> Message: 12
> Date: Sat, 16 Aug 2014 15:31:36 +0100
> From: "Robert Jarratt" <robert.jarratt at ntlworld.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: VT240 Monitor Error - 9
> Message-ID: <008801cfb95e$c8e7e9e0$5ab7bda0$(a)ntlworld.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> I just got a VT240 with a VR201 monitor. When I switch it on it displays
> "??240 Monitor Error - 9" (although the question marks are reversed).
>
>
>
> The terminal works otherwise. It displays the setup menus, and it works when
> connected to one of my VAXen.
>
>
>
> I have looked in the docs I have, but none have troubleshooting information,
> and I can't find anything online.
>
>
>
> Any idea what this error means?
>
>
>
> Incidentally, I used to use a software package called UNIRAS to do graphics
> on VAXen, does anyone know if it is still possible to find this software?
> Anyone got anything to exercise the VT240's graphical capabilities? I
> believe Datatrieve has something, but I don't want to install that just to
> test the VT240.
>
>
>
> Regards
>
>
>
> Rob
>
>
>
> ------------------------------
>
> Message: 13
> Date: Sat, 16 Aug 2014 10:44:12 -0400
> From: Sean Caron <scaron at umich.edu>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>, Sean Caron <scaron at umich.edu>
> Subject: Re: standard 6502 syntax?
> Message-ID:
> <CAA43vkX1MPRHYNQUktV3Qux1kh4XG_tiy9o5rvnxrYSBc4=QvA at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Hi A.P,
>
> The data sheets are out there; I've seen about three different datasheets
> for the 6502 floating around, one is the original MOS preliminary, there's
> a Synertek one, and there's the brand new one from WDC. I'm sure you could
> find more if you hunted around.
>
> It's all the same op-codes and addressing modes; except in the currently
> shipping 65C02(S) they added a few instructions and filled out a few pins
> that aren't present in the earlier revs. So if you are working with an
> older 6502, use the older datasheet; if you just went out and got a brand
> new one from WDC, use the new data sheet.
>
> Other than that, any old 6502 data sheet is about as definitive as it gets
> :)
>
> If you are talking about assembler macros and stuff like that, I'm sure
> there are as many variants as there were assemblers, little to no
> standardization there from my experience, LOL. But regardless of the
> computer, it's the same 6502 and same op-codes underneath.
>
> I'm in the middle of doing a little 6502 SBC right now so I've been poring
> through these publications quite a bit over the course of the last few
> weeks ;)
>
> Another neat reference is 'The 6800 Processor' by Jack Quinn, I know it's
> not 6502-specific but the two CPUs were so similar, there's a lot of
> relevance... nice book discussing the programming model on these CPUs
> including a very thorough treatment on hand-assembly which I found to be
> quite educational.
>
> Best,
>
> Sean
>
>
>
> On Sat, Aug 16, 2014 at 9:45 AM, A. P. Garcia <a.phillip.garcia at gmail.com>
> wrote:
>
>> Was there more or less a standard or reference 6502 assembly language (e.g.
>> from MOS) with regard to syntax and pseudo ops? With the cpu being used in
>> so many different computers, and so many vendors writing their own
>> assemblers for each platform, did the assemblers tend to resemble each
>> other (besides the instruction set), or did everyone tend to do their own
>> thing?
>
>
> ------------------------------
>
> Message: 14
> Date: Sat, 16 Aug 2014 16:01:26 +0100
> From: Dave Caroline <dave.thearchivist at gmail.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: standard 6502 syntax?
> Message-ID:
> <CALfYgtk7LJPCiAKHxRp-WsU-=LuxGdvM0MjzFBLdP-x_LBVBSQ at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> It is electrically different to the 6800 not to confuse the two chips,
> different clock etc
> There was a Rockwell version too
>
> Dave Caroline
>
>> On 16/08/2014, Sean Caron <scaron at umich.edu> wrote:
>> Hi A.P,
>>
>> The data sheets are out there; I've seen about three different datasheets
>> for the 6502 floating around, one is the original MOS preliminary, there's
>> a Synertek one, and there's the brand new one from WDC. I'm sure you could
>> find more if you hunted around.
>>
>> It's all the same op-codes and addressing modes; except in the currently
>> shipping 65C02(S) they added a few instructions and filled out a few pins
>> that aren't present in the earlier revs. So if you are working with an
>> older 6502, use the older datasheet; if you just went out and got a brand
>> new one from WDC, use the new data sheet.
>>
>> Other than that, any old 6502 data sheet is about as definitive as it gets
>> :)
>>
>> If you are talking about assembler macros and stuff like that, I'm sure
>> there are as many variants as there were assemblers, little to no
>> standardization there from my experience, LOL. But regardless of the
>> computer, it's the same 6502 and same op-codes underneath.
>>
>> I'm in the middle of doing a little 6502 SBC right now so I've been poring
>> through these publications quite a bit over the course of the last few
>> weeks ;)
>>
>> Another neat reference is 'The 6800 Processor' by Jack Quinn, I know it's
>> not 6502-specific but the two CPUs were so similar, there's a lot of
>> relevance... nice book discussing the programming model on these CPUs
>> including a very thorough treatment on hand-assembly which I found to be
>> quite educational.
>>
>> Best,
>>
>> Sean
>>
>>
>>
>> On Sat, Aug 16, 2014 at 9:45 AM, A. P. Garcia <a.phillip.garcia at gmail.com>
>> wrote:
>>
>>> Was there more or less a standard or reference 6502 assembly language
>>> (e.g.
>>> from MOS) with regard to syntax and pseudo ops? With the cpu being used
>>> in
>>> so many different computers, and so many vendors writing their own
>>> assemblers for each platform, did the assemblers tend to resemble each
>>> other (besides the instruction set), or did everyone tend to do their own
>>> thing?
>
>
> ------------------------------
>
> Message: 15
> Date: Sat, 16 Aug 2014 11:14:29 -0400
> From: Sean Caron <scaron at umich.edu>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>, Sean Caron <scaron at umich.edu>
> Subject: Re: CompuServe Magazine Scans
> Message-ID:
> <CAA43vkWT9FSPhky2PH4SONL_93mO+78zH0v3AfrBX5vu1nq7_g at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Is there a lot of interest in this sort of stuff? I have a bunch of old
> MacUser and Macworld magazines (various issues, 1985 thru 1996 or so)
> including a mint October 1985 MacUser issue 1, a bunch of old LisaTalk
> Report magazines, and some Sun Remarketing catalogs. I would have more but
> this is all I managed to save from my Dad's house-cleaning (AFAIK). Might
> still be able to scrape up a few more next time I visit. Hope to find a few
> more old MacUser/Macworld mags and a stack of mid-1990s Byte magazines I
> collected as a young'un.
>
> I suppose I could add some of these to my to-scan pile... we'll see what
> the masses think. I enjoy thumbing through them.
>
> Best,
>
> Sean
>
>
>
>> On Sat, Aug 16, 2014 at 3:31 AM, Jason T <silent700 at gmail.com> wrote:
>>
>> I am very pleased to announce, and be done with, the scanning of a
>> small stack of CompuServe Magazine, the magazine sent to subscribers
>> of the online service of the same name. There are 19 issues in all,
>> various months from 1990, 91 and 92. They're full of ads for "The
>> Mall," CompuServe's online shopping service, with a good sampling of
>> the products of the times. The articles cover a wide range of topics
>> (and how they're accessible on their service) as well as predictions
>> of CompuServe's existence for decades to come. Not much mention of
>> this "Internet" thing...
>>
>> Due to the size of the files and the ease of reading documents in
>> their browser, I uploaded the scans to archive.org instead of our
>> usual docs site. All of the issues should be accessible with this
>> search:
>>
>> https://archive.org/search.php?query=compuserve%20magazine
>>
>> Enjoy!
>>
>> - jht
>>
>> --
>> silent700.blogspot.com
>> Retrocomputing and collecting in the Chicago area:
>> http://chiclassiccomp.org
>
>
> ------------------------------
>
> Message: 16
> Date: Sat, 16 Aug 2014 11:20:24 -0400
> From: Sean Caron <scaron at umich.edu>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>, Sean Caron <scaron at umich.edu>
> Subject: Re: standard 6502 syntax?
> Message-ID:
> <CAA43vkU+vf8ta_XTRwb8115OFDU61HPwa=LcHaqOEfJX8r=uhg at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Oh, yes, sorry, I hope I wasn't unclear in my previous message; the only
> similarity between 6800 and 6502 is the general machine architecture and
> programming modality (they also share many assembly mnemonics). The 6800
> and 6502 are not op-code or pin compatible.
>
> I just referenced the Quinn text because I think it's pretty good for the
> high-level concepts and I'm not aware of any similar publication dedicated
> to the 6502 specifically.
>
> Best,
>
> Sean
>
>
> On Sat, Aug 16, 2014 at 11:01 AM, Dave Caroline <dave.thearchivist at gmail.com
>> wrote:
>
>> It is electrically different to the 6800 not to confuse the two chips,
>> different clock etc
>> There was a Rockwell version too
>>
>> Dave Caroline
>>
>>> On 16/08/2014, Sean Caron <scaron at umich.edu> wrote:
>>> Hi A.P,
>>>
>>> The data sheets are out there; I've seen about three different datasheets
>>> for the 6502 floating around, one is the original MOS preliminary,
>> there's
>>> a Synertek one, and there's the brand new one from WDC. I'm sure you
>> could
>>> find more if you hunted around.
>>>
>>> It's all the same op-codes and addressing modes; except in the currently
>>> shipping 65C02(S) they added a few instructions and filled out a few pins
>>> that aren't present in the earlier revs. So if you are working with an
>>> older 6502, use the older datasheet; if you just went out and got a brand
>>> new one from WDC, use the new data sheet.
>>>
>>> Other than that, any old 6502 data sheet is about as definitive as it
>> gets
>>> :)
>>>
>>> If you are talking about assembler macros and stuff like that, I'm sure
>>> there are as many variants as there were assemblers, little to no
>>> standardization there from my experience, LOL. But regardless of the
>>> computer, it's the same 6502 and same op-codes underneath.
>>>
>>> I'm in the middle of doing a little 6502 SBC right now so I've been
>> poring
>>> through these publications quite a bit over the course of the last few
>>> weeks ;)
>>>
>>> Another neat reference is 'The 6800 Processor' by Jack Quinn, I know it's
>>> not 6502-specific but the two CPUs were so similar, there's a lot of
>>> relevance... nice book discussing the programming model on these CPUs
>>> including a very thorough treatment on hand-assembly which I found to be
>>> quite educational.
>>>
>>> Best,
>>>
>>> Sean
>>>
>>>
>>>
>>> On Sat, Aug 16, 2014 at 9:45 AM, A. P. Garcia <
>> a.phillip.garcia at gmail.com>
>>> wrote:
>>>
>>>> Was there more or less a standard or reference 6502 assembly language
>>>> (e.g.
>>>> from MOS) with regard to syntax and pseudo ops? With the cpu being used
>>>> in
>>>> so many different computers, and so many vendors writing their own
>>>> assemblers for each platform, did the assemblers tend to resemble each
>>>> other (besides the instruction set), or did everyone tend to do their
>> own
>>>> thing?
>
>
> ------------------------------
>
> Message: 17
> Date: Sat, 16 Aug 2014 10:31:18 -0500
> From: "A. P. Garcia" <a.phillip.garcia at gmail.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: standard 6502 syntax?
> Message-ID:
> <CAFCBnZukAFOvmqi=hM+spOPr8u4io-Z8PYkyDg5CvWtr_kJqKA at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> On Sat, Aug 16, 2014 at 9:44 AM, Sean Caron <scaron at umich.edu> wrote:
>
> <snip>
>> If you are talking about assembler macros and stuff like that, I'm sure
>> there are as many variants as there were assemblers, little to no
>> standardization there from my experience, LOL. But regardless of the
>> computer, it's the same 6502 and same op-codes underneath.
>
> Yes, that's what I was getting at. Given the lack of standardization,
> my next set of questions would be: Was there a specific 6502 assembler
> that you particularly enjoyed working with? Was there a dominant one
> on the market--i.e. is there a particular assembler for which a
> majority of available code was written for? Probably the most famous
> bit of 6502 asm out there is the Apple II Prince of Persia
> [https://github.com/jmechner/Prince-of-Persia-Apple-II]. Which
> assembler(s) can process this source as-is?
>
>
>> I'm in the middle of doing a little 6502 SBC right now so I've been poring
>> through these publications quite a bit over the course of the last few
>> weeks ;)
>>
>> Another neat reference is 'The 6800 Processor' by Jack Quinn, I know it's
>> not 6502-specific but the two CPUs were so similar, there's a lot of
>> relevance... nice book discussing the programming model on these CPUs
>> including a very thorough treatment on hand-assembly which I found to be
>> quite educational.
>
> Nice. Thanks for the recommendation.
>
>
> ------------------------------
>
> Message: 18
> Date: Sat, 16 Aug 2014 10:06:02 -0600
> From: Mike Cesari <mcesari at comcast.net>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: VT240 Monitor Error - 9
> Message-ID: <4E13E18A-EECF-408B-96A5-EB14B0AAA16D at comcast.net>
> Content-Type: text/plain; charset=us-ascii
>
>
> Here's the Manx reference:
>
> http://manx.classiccmp.org/details.php/1,2969
>
> On page 12 it lists 3 possibilities:
>
> 1. Plug in VR201 (LED indicator only)
> 2. Reverse monitor cable.
> 3. replace monitor cable.
>
> Good luck,
>
> Mike
>
>> On Aug 16, 2014, at 8:31 AM, Robert Jarratt <robert.jarratt at ntlworld.com> wrote:
>>
>> I just got a VT240 with a VR201 monitor. When I switch it on it displays
>> "??240 Monitor Error - 9" (although the question marks are reversed).
>>
>>
>>
>> The terminal works otherwise. It displays the setup menus, and it works when
>> connected to one of my VAXen.
>>
>>
>>
>> I have looked in the docs I have, but none have troubleshooting information,
>> and I can't find anything online.
>>
>>
>>
>> Any idea what this error means?
>>
>>
>>
>> Incidentally, I used to use a software package called UNIRAS to do graphics
>> on VAXen, does anyone know if it is still possible to find this software?
>> Anyone got anything to exercise the VT240's graphical capabilities? I
>> believe Datatrieve has something, but I don't want to install that just to
>> test the VT240.
>>
>>
>>
>> Regards
>>
>>
>>
>> Rob
>
>
>
>
> ------------------------------
>
> Message: 19
> Date: Sat, 16 Aug 2014 09:12:38 -0700
> From: "Brian L. Stuart" <blstuart at bellsouth.net>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Subject: Re: Disk for HP 9825B
> Message-ID:
> <1408205558.88109.YahooMailBasic at web184706.mail.ne1.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
>> I and others have been looking for a
>> 98228A ROM for years, without luck.? If you do manage
>> to find one, please consider making it available to have the
>> contents of the ROM read out so we can build new ROM
>> modules!? I'd love to use my 9885M with my 9825T.?
>
> What would be involved with imaging a module? I've
> never cracked on open before, or is there a way to read
> its contents from the 9825 itself?
>
> BLS
>
>
>
>
> ------------------------------
>
> Message: 20
> Date: Sat, 16 Aug 2014 09:10:51 -0700 (PDT)
> From: "Ernest G. Allen" <eallen at owt.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Cc: eallen at owt.com
> Subject: Re: standard 6502 syntax?
> Message-ID: <alpine.LRH.2.00.1408160908040.23281 at oneworld.owt.com>
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
>
>
>> On Sat, 16 Aug 2014, A. P. Garcia wrote:
>>
>> Date: Sat, 16 Aug 2014 08:31:18
>> From: A. P. Garcia <a.phillip.garcia at gmail.com>
>> Reply-To: "General Discussion: On-Topic and Off-Topic Posts"
>> <cctalk at classiccmp.org>
>> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>> Subject: Re: standard 6502 syntax?
>>
>> On Sat, Aug 16, 2014 at 9:44 AM, Sean Caron <scaron at umich.edu> wrote:
>>
>> <snip>
>>> If you are talking about assembler macros and stuff like that, I'm sure
>>> there are as many variants as there were assemblers, little to no
>>> standardization there from my experience, LOL. But regardless of the
>>> computer, it's the same 6502 and same op-codes underneath.
>>
>> Yes, that's what I was getting at. Given the lack of standardization,
>> my next set of questions would be: Was there a specific 6502 assembler
>> that you particularly enjoyed working with? Was there a dominant one
>> on the market--i.e. is there a particular assembler for which a
>> majority of available code was written for? Probably the most famous
>> bit of 6502 asm out there is the Apple II Prince of Persia
>> [https://github.com/jmechner/Prince-of-Persia-Apple-II]. Which
>> assembler(s) can process this source as-is?
>>
>>
>>> I'm in the middle of doing a little 6502 SBC right now so I've been poring
>>> through these publications quite a bit over the course of the last few
>>> weeks ;)
>>>
>>> Another neat reference is 'The 6800 Processor' by Jack Quinn, I know it's
>>> not 6502-specific but the two CPUs were so similar, there's a lot of
>>> relevance... nice book discussing the programming model on these CPUs
>>> including a very thorough treatment on hand-assembly which I found to be
>>> quite educational.
>>
>> Nice. Thanks for the recommendation.
>
> Thank you for the github link.
>
> I think that the assembler source for Prince of Persia was
> written for the Merlin version 2.52 assemlber. See the line:
>
> * Merlin 2.52 --> RW18 "USR" interface routine.
>
> near the top of the file "04 Support/MakeDisk/USR18.S".
>
> --Ernest
>
>
>
> ------------------------------
>
> Message: 21
> Date: Sat, 16 Aug 2014 09:37:46 -0700
> From: Chuck Guzis <cclist at sydex.com>
> To: General Discussion: On-Topic and Off-Topic Posts
> <cctalk at classiccmp.org>
> Subject: Re: Displaywriter 8" filesystem?
> Message-ID: <53EF88DA.6030402 at sydex.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
>> On 08/15/2014 10:24 AM, David Schmidt wrote:
>>
>> I've browsed the manuals on Bitsavers, but of course IBM never intended
>> their users to actually look at the bytes on the disk. So none of the
>> information was geared towards revealing the file allocation secrets.
>>
>> Is there any reference material out there to help me decode (or find)
>> the file allocation structures?
>
> I did a DW to (of all things) HTML conversion utility some years back. I
> recall that the filesystem (if it could be called that) was a bit odd.
> The curious thing that I remember about the data was that all of the
> special effects (bolding, underlining) were actual printer codes fro the
> IBM daisywheel printer.
>
> If you're desperate, I can see if I can still find my work. I haven't
> seen a DW floppy in perhaps a decade.
>
> --Chuck
>
>
>
>
> ------------------------------
>
> Message: 22
> Date: Sat, 16 Aug 2014 17:41:22 +0100
> From: "Dave G4UGM" <dave.g4ugm at gmail.com>
> To: "'General Discussion: On-Topic and Off-Topic Posts'"
> <cctalk at classiccmp.org>
> Subject: Punched Cards
> Message-ID: <000201cfb970$eb46b8b0$c1d42a10$(a)gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Folks,
>
>
>
> I seem to remember that some time ago it was mentioned on here that there
> was a place in Germany that still sold punched cards?
>
> Any one in the UK?
>
>
>
> Dave
>
> G4UGM
>
>
>
>
>
> ------------------------------
>
> Message: 23
> Date: Sat, 16 Aug 2014 17:51:07 +0100
> From: "Robert Jarratt" <robert.jarratt at ntlworld.com>
> To: "'General Discussion: On-Topic and Off-Topic Posts'"
> <cctalk at classiccmp.org>
> Subject: RE: VT240 Monitor Error - 9
> Message-ID: <009301cfb972$46870da0$d39528e0$(a)ntlworld.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> I missed the pocket manual, thanks for that. I have reversed the monitor
> cable and it comes up with VT240 OK now.
>
> Thanks!
>
> Rob
>
>> -----Original Message-----
>> From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
>> On Behalf Of Mike Cesari
>> Sent: 16 August 2014 17:06
>> To: General Discussion: On-Topic and Off-Topic Posts
>> Subject: Re: VT240 Monitor Error - 9
>>
>>
>> Here's the Manx reference:
>>
>> http://manx.classiccmp.org/details.php/1,2969
>>
>> On page 12 it lists 3 possibilities:
>>
>> 1. Plug in VR201 (LED indicator only)
>> 2. Reverse monitor cable.
>> 3. replace monitor cable.
>>
>> Good luck,
>>
>> Mike
>>
>> On Aug 16, 2014, at 8:31 AM, Robert Jarratt <robert.jarratt at ntlworld.com>
>> wrote:
>>
>>> I just got a VT240 with a VR201 monitor. When I switch it on it
>>> displays
>>> "??240 Monitor Error - 9" (although the question marks are reversed).
>>>
>>>
>>>
>>> The terminal works otherwise. It displays the setup menus, and it
>>> works when connected to one of my VAXen.
>>>
>>>
>>>
>>> I have looked in the docs I have, but none have troubleshooting
>>> information, and I can't find anything online.
>>>
>>>
>>>
>>> Any idea what this error means?
>>>
>>>
>>>
>>> Incidentally, I used to use a software package called UNIRAS to do
>>> graphics on VAXen, does anyone know if it is still possible to find this
>> software?
>>> Anyone got anything to exercise the VT240's graphical capabilities? I
>>> believe Datatrieve has something, but I don't want to install that
>>> just to test the VT240.
>>>
>>>
>>>
>>> Regards
>>>
>>>
>>>
>>> Rob
>
>
>
>
> End of cctalk Digest, Vol 132, Issue 35
> ***************************************
The IBM 3278 terminal that I've been waiting for is now officially lost. UPS even said so!
What I found out is that when you track a package on UPS, most of the "scans" you see
are logical scans. That is, where UPS *thinks* the package is. UPS doesn't actually
know where a package is unless there are "physical" scans. At certain points in a
package's travels, there will be occasional physical scans but they are not as often as
UPS's tracking would imply.
It turns out that with my 3278 terminal, there was not *one* physical scan. The folks at
UPS said that is *very* unusual. It could mean that it's sitting where the shipper dropped
it off (here's hoping) and never actually went anywhere.
It's not like it's a small package (145# in a wooden crate). So it's not likely to have been
misplaced. ;-)
The other thing that I found out about UPS, is that they don't really want to talk to the
receiver. They only want to talk to the shipper. Fortunately the shipper in this case has
been really helpful and willing to deal with UPS on my behalf.
So, anyone know where there's an IBM 3278/9 terminal available? ;-)
TTFN - Guy
Does anyone know of a good source or have 2 or 3 of the little cylindrical
12.5V 2A plug type fuses commonly found on Sun hardware P/N 150-1174-01? I
blew one on my IPC and it would be nice to have a couple spares too.
-Kurt
Folks,
I seem to remember that some time ago it was mentioned on here that there
was a place in Germany that still sold punched cards?
Any one in the UK?
Dave
G4UGM
Who asked for the Timex Sinclair computer and RAM module?
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
830-792-3400 phone
830-792-3404 fax
sales at elecplus.com
AOL IM elcpls
>
> From: Marco Rauhut <marco at familie-rauhut.eu>
> Date: Fri, 15 Aug 2014 18:37:57 +0200
> Hello,
>
> i trie to copy a binary file with 6kw length from my Linux PC to a TU56
> DECTape. The TU56 is connected via TD8E to the PDP-8. I work with 9k6.
> Every time i try this, the transmission stops.
>
> What id on PDP-8:
>
> .R PIP
> *DTA1:CHESS.BN<PTR:/B
> ^
>
> then on Linux i send plain Chess file.
>
> Do i need hardware flow controll on RS232? Any other helpfull hints?
>
> Marco
>
When we tried something similar on an 8/I, and it also failed. It worked OK
after we connected the reader relay logic on the console to RTS/CTS on the
PC and enabled flow control.
You could make an image of the DECtape using SIMH and then use David
Gesswein's resttd8e. One part of the program runs on the PDP-8, and one
part runs on the PC. No hardware flow control is needed.
ftp://ftp.pdp8online.com/software/dumprest
--
Michael Thompson
