[GreenKeys] Text to Baudot

Sat May 13 00:02:04 EDT 2017

@Kevin,

You lost me totally on "my favorite TU, the AEA CP-1" - no idea what that's
about, or how it might apply to the C64 et al. As far as interfacing the
C64 to the broad RS-232 world, you will want a TTL (0-5V) to RS-232
(+/-12V) converter. These exist as prebuilt modules with header / DB-9
connectors, and cost ~$2/ea when ordered from Asian vendors. They are based
on an SMD version of the MAX232 chip, which is a TTL-level device that uses
ext. caps to run charge pumps, which then create the +/-12 levels from the
5V Vcc.

@All,

Turns out I have 3pc. ea. of chips and modules on-hand. Modules are $4/ea
shipped, MAX232 chip + socket are $2/ea shipped.

On Fri, May 12, 2017 at 10:25 PM, Kevin DeWitt <kevin.dewitt at gmail.com>
wrote:

> In preparing to build the adapter for my VIC-20/C64/SX64, I discovered
> something I had overlooked about my favorite TU, the AEA CP-1. It already
> has a TTL port. The first step will be to get a few of the blue "side
> connectors" from ebay and 5 pin TTL connectors from whomever sells them and
> make some cables. Once those are going ok then I'll move on to the TTL to
> RS232 gizmo. I was pretty tired today during my websearch, but I swear I
> saw an iPad to ttl cable for $59, I'll look for it again later.
>
> Kevin
>
> On May 12, 2017 10:04 PM, "drlegendre ." <drlegendre at gmail.com> wrote:
>
>> Whoops, one more thing on CBM TTL to RS-232..
>>
>> CBM did produce a proper RS-232 user port adapter, model "VIC-1011A" for
>> the C-64 / VIC, but it was quite expensive, useless for 95% of all
>> end-users and didn't sell well. Today they are very uncommon, but if you
>> have one, it should work just fine.
>>
>> Anyway, if I had to do it again, I'd just build one of the modules right
>> into the case.
>>
>> On Fri, May 12, 2017 at 8:47 PM, drlegendre . <drlegendre at gmail.com>
>> wrote:
>>
>>> Jordan, All who might have interest..
>>>
>>> The software / hardware offer is open to anyone who might be interested
>>> in trying it. Like I said, all the 'hard' work is done, it's pretty much a
>>> turn-key operation at this point to get it working (assuming you have
>>> rs-232 to 60ma loop conv.). I built one of the Aetheric converters, and
>>> while I've always used it with my rs-232 level converter, it seems that it
>>> should work just fine off the 'bare' CBM TTL-level port. Either way, it's
>>> good to have the TTL / 232 converter, as it opens up other possibilities.
>>>
>>> There are two ways to do the proper 232 port on the CBM: 1) Use a
>>> complete module (under $5) and build it right into the computer case -or-
>>> 2) Use a MAX232 chip (under $1) and build a converter out of an old
>>> VIC-1600 300 baud modem. You literally strip everything off the modem
>>> board, and only use the board itself and the port connector as a platform
>>> to build the circuit. I went the latter route, as I didn't know the
>>> complete modules were so cheap & easy!
>>>
>>> As for the software, well, LOAD and RUN it.. that's it. Also feel free
>>> to strip out the ASC2BAUD and BAUD2ASC routines for your own projects, or
>>> just use them as guides. That said, I'm +sure+ they could be improved,
>>> shrunk, sped up, etc. I only did the ASM version to see if I could (I
>>> needed to finally learn some ASM), it offers no advantages other than being
>>> somewhat smaller and faster - though the speed is of no issue at 45.45
>>> baud! Oh, and the ASM uses a very neat 'typewriter' custom char. set built
>>> by a fellow named Rudi.
>>>
>>> Just send me an off-list mail and I'll forward you the software. If you
>>> want 232 modules or chips, I have +plenty+ more than I will +ever+ use! So
>>> just ask, they are dirt-cheap.. and I'd like to see them used.
>>>
>>> On Fri, May 12, 2017 at 12:52 PM, Jordan Spencer Cunningham <js at cunni.co
>>> > wrote:
>>>
>>>> I have nine C64s here in my basement, most of them working in some
>>>> fashion. One of the many projects I have on my plate is to frankenstein
>>>> them all to a few 100% working, physically complete C64s. While I've also
>>>> been interested in building a text to Baudot interface (and vice versa--
>>>> I'm also working on joining the i-Telex network), mine has been focused on
>>>> interfacing with modern technology for the purpose of wider capabilities.
>>>> That being said, I'd be extremely interested to get more information on
>>>> your software and wiring a C64 up to a current loop. I have the military
>>>> labeled M15 and M19; getting them talking to one of my Commodores would
>>>> perhaps be among the chief accomplishments in my life.
>>>>
>>>> --Jordan
>>>>
>>>> On Fri, May 12, 2017 at 4:42 AM, drlegendre . <drlegendre at gmail.com>
>>>> wrote:
>>>>
>>>>> Kevin,
>>>>>
>>>>> The user port on the C-64 or the VIC-20 implements a simple RS-232
>>>>> interface. In terms of protocol, it's fairly well compatible - but it
>>>>> doesn't implement the proper +/-12V levels of true RS-232. In some cases,
>>>>> this doesn't many any difference, but to have a level-correct RS-232 you
>>>>> need one of the TTL to 232 adapter modules. I have several here, if you
>>>>> need one - they are very cheap.
>>>>>
>>>>> Once you have a functional serial port, it's as easy as connecting the
>>>>> port to your 20/60ma current-loop adapter, and then onto the TTY. My
>>>>> software will support 2-way, full duplex chat between the CBM and the M15,
>>>>> with full support for special chars, bell, cr, lf etc. You can also spool
>>>>> text files from the CBM to the M15, like a printer driver.
>>>>>
>>>>> On Thu, May 11, 2017 at 8:41 AM, Kevin DeWitt <kevin.dewitt at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Now that sounds like fun.
>>>>>>
>>>>>> I still have the VIC-20 I bought when they first came out. A few
>>>>>> years back a fellow HAM gave me his old BBS equipment (2-C64's, 2-1541
>>>>>> drives, an SX-64 portable and all the associated software) so I have no
>>>>>> shortage of machines for testing. Over the winter the kids (10 and 15)
>>>>>> expressed interest in programming so out came the machines and we ran
>>>>>> through some BASIC stuff (pun intended).
>>>>>>
>>>>>> Since the teletypes have revived the old "bug" I was thinking it
>>>>>> would be neat to build an interface for the one (or a few of) the old
>>>>>> Commodores. Would the port be able to drive a polar relay? I bet it will
>>>>>> take less time now to type in several pages of code.
>>>>>>
>>>>>> Kevin
>>>>>>
>>>>>> On Wed, May 10, 2017 at 9:25 PM, drlegendre . <drlegendre at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Not sure if it's worth mentioning, but I also wrote an (PET) ASCII
>>>>>>> <-> 5-line baudot program for C-64, which should also run on VIC & Pet.
>>>>>>> BASIC source is available, but there's also a pure-ML version for C-64
>>>>>>> available as a binary. If you are a real C-64 nerd, I might even share the
>>>>>>> source with you.. =P
>>>>>>>
>>>>>>> My software is designed to drive an M15 etc. from a C-64, but the
>>>>>>> ASCII / baudot routines can easily be transplanted into your software. It
>>>>>>> uses a simple lookup table (array), populated from DATA statements.
>>>>>>>
>>>>>>> On Wed, May 10, 2017 at 2:11 PM, Jeffrey D Angus <jdangus at att.net>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> And of course, there's HAL Communications DSRTTY as well.
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Jeff-1.0
>>>>>>>> wa6fwi
>>>>>>>> http://www.foxsmercantile.com
>>>>>>>>
>>>>>>>>
>>>>>>>> ---
>>>>>>>> This email has been checked for viruses by AVG.
>>>>>>>> http://www.avg.com
>>>>>>>>
>>>>>>>>
>>>>>>>> ______________________________________________________________
>>>>>>>> GreenKeys mailing list
>>>>>>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>>>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>>>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>>>>
>>>>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/piperma
>>>>>>>> il/greenkeys/
>>>>>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive
>>>>>>>> /greenkeys/greenkeys.html
>>>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>>>>>>
>>>>>>>> This list hosted by: http://www.qsl.net
>>>>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ______________________________________________________________
>>>>>>> GreenKeys mailing list
>>>>>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>>>
>>>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/piperma
>>>>>>> il/greenkeys/
>>>>>>> 1998-to-2001
>>>>>>> <http://mailman.qth.net/pipermail/greenkeys/1998-to-2001> greenkeys
>>>>>>> archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>>>>>
>>>>>>> This list hosted by: http://www.qsl.net
>>>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> ______________________________________________________________
>>>>> GreenKeys mailing list
>>>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>
>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/piperma
>>>>> il/greenkeys/
>>>>> 1998-to-2001 <http://mailman.qth.net/pipermail/greenkeys/1998-to-2001>
>>>>> greenkeys archive: http://mailman.qth.net/archive
>>>>> /greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>>>
>>>>> This list hosted by: http://www.qsl.net
>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>>>
>>>>
>>>>
>>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20170512/921ef781/attachment.html>