#xmodem — Public Fediverse posts

I'm turning to you people as I am at a loss with regards to the following issue:

On #rc2014bbs I use KMD to provide #xmodem transfer over the serial line (and, eventually via #wifimodem over the internet).

This works as long as you either connect with another #rc2014 using #qterm or #imp or if you use a #Commodore64 using #ccgms

But when you try to perform xmodem transfer from a modern machine (PC, Mac - it doesn't matter) using a modern terminal program (Syncterm, Qodem, TeraTerm, lrzsz etc. - it doesn't matter) the transfer begins, sending a few blocks and then gets into a NAK loop and aborts due to the error count reaching max.

So, my question to the wise, collective fedimind is: what can be the cause for such a behaviour? Timing issues?! Old xmodem implementation within KMD?! Some interference from the #Zimodem firmware?!

Any suggestions, comments etc. are welcome!

I'm turning to you people as I am at a loss with regards to the following issue:

On #rc2014bbs I use KMD to provide #xmodem transfer over the serial line (and, eventually via #wifimodem over the internet).

This works as long as you either connect with another #rc2014 using #qterm or #imp or if you use a #Commodore64 using #ccgms

But when you try to perform xmodem transfer from a modern machine (PC, Mac - it doesn't matter) using a modern terminal program (Syncterm, Qodem, TeraTerm, lrzsz etc. - it doesn't matter) the transfer begins, sending a few blocks and then gets into a NAK loop and aborts due to the error count reaching max.

So, my question to the wise, collective fedimind is: what can be the cause for such a behaviour? Timing issues?! Old xmodem implementation within KMD?! Some interference from the #Zimodem firmware?!

Any suggestions, comments etc. are welcome!

I'm turning to you people as I am at a loss with regards to the following issue:

On #rc2014bbs I use KMD to provide #xmodem transfer over the serial line (and, eventually via #wifimodem over the internet).

This works as long as you either connect with another #rc2014 using #qterm or #imp or if you use a #Commodore64 using #ccgms

But when you try to perform xmodem transfer from a modern machine (PC, Mac - it doesn't matter) using a modern terminal program (Syncterm, Qodem, TeraTerm, lrzsz etc. - it doesn't matter) the transfer begins, sending a few blocks and then gets into a NAK loop and aborts due to the error count reaching max.

So, my question to the wise, collective fedimind is: what can be the cause for such a behaviour? Timing issues?! Old xmodem implementation within KMD?! Some interference from the #Zimodem firmware?!

Any suggestions, comments etc. are welcome!

I'm turning to you people as I am at a loss with regards to the following issue:

On #rc2014bbs I use KMD to provide #xmodem transfer over the serial line (and, eventually via #wifimodem over the internet).

This works as long as you either connect with another #rc2014 using #qterm or #imp or if you use a #Commodore64 using #ccgms

But when you try to perform xmodem transfer from a modern machine (PC, Mac - it doesn't matter) using a modern terminal program (Syncterm, Qodem, TeraTerm, lrzsz etc. - it doesn't matter) the transfer begins, sending a few blocks and then gets into a NAK loop and aborts due to the error count reaching max.

So, my question to the wise, collective fedimind is: what can be the cause for such a behaviour? Timing issues?! Old xmodem implementation within KMD?! Some interference from the #Zimodem firmware?!

Any suggestions, comments etc. are welcome!

I'm turning to you people as I am at a loss with regards to the following issue:

On #rc2014bbs I use KMD to provide #xmodem transfer over the serial line (and, eventually via #wifimodem over the internet).

This works as long as you either connect with another #rc2014 using #qterm or #imp or if you use a #Commodore64 using #ccgms

But when you try to perform xmodem transfer from a modern machine (PC, Mac - it doesn't matter) using a modern terminal program (Syncterm, Qodem, TeraTerm, lrzsz etc. - it doesn't matter) the transfer begins, sending a few blocks and then gets into a NAK loop and aborts due to the error count reaching max.

So, my question to the wise, collective fedimind is: what can be the cause for such a behaviour? Timing issues?! Old xmodem implementation within KMD?! Some interference from the #Zimodem firmware?!

Any suggestions, comments etc. are welcome!

This may be of interest to those who are running VICE to emulate a Commodore 64 and using tcpser to bridge serial I/O to the internet:

There seems to be an isssue with how tcpser encodes the carrier status (see post from lemon64.com below), affecting serial file transfers.

I have tried a few of the many forks of tcpser (including the fozztexx one and Jim Brain's original code) and none of them worked when trying to transfer files.

Discussion: https://www.lemon64.com/forum/viewtopic.php?t=72228#top

The solution to the problem was to use a different tool to "bridge" the serial communication: TCPSerial.jar which is a Java based implementation of tcpser. It is an updated version of Jim Brain's Java codebase (tcpser4j) to work with Java 21:

https://github.com/MyDeveloperThoughts/tcpserial/releases/tag/Version1.00

Using this tool instead of the original, C code based tcpser made it possible to finally transfer files using x/ymodem.

I thought I should let you know ... 🤔

#Commodore64
#VICE
#tcpser
#xmodem
#problems
#solution
#TCPSerial

Oh, the smell of 8-bit file transfers from a BBS ...

(on the sending end, at RC-BOX BBS, the CP/M program KMD.COM is being used)

#xmodem
#crc
#CCGMSfuture
#Commodore64
#Striketerm

Oh, the smell of 8-bit file transfers from a BBS ...

(on the sending end, at RC-BOX BBS, the CP/M program KMD.COM is being used)

#xmodem
#crc
#CCGMSfuture
#Commodore64
#Striketerm

Oh, the smell of 8-bit file transfers from a BBS ...

(on the sending end, at RC-BOX BBS, the CP/M program KMD.COM is being used)

#xmodem
#crc
#CCGMSfuture
#Commodore64
#Striketerm

Oh, the smell of 8-bit file transfers from a BBS ...

(on the sending end, at RC-BOX BBS, the CP/M program KMD.COM is being used)

#xmodem
#crc
#CCGMSfuture
#Commodore64
#Striketerm

Oh, the smell of 8-bit file transfers from a BBS ...

(on the sending end, at RC-BOX BBS, the CP/M program KMD.COM is being used)

#xmodem
#crc
#CCGMSfuture
#Commodore64
#Striketerm

Звоним через полстраны по dial-up модему в 2025 году

Приветствую всех! Многие из нас застали лично и всё ещё помнят «модемную» эпоху. И даже мне самому доводилось ими пользоваться, а много позже я писал про то, каково в нынешних реалиях сидеть в интернете через старый аналоговый модем. Но вот мне стало интересно: а как насчёт попробовать позвонить не через мини-АТС, а на модем в другом районе или даже в другом городе? Именно этим мы сейчас и займёмся. Итак, в сегодняшней статье проверим на практике, реально ли заставить два модема связаться друг с другом в наши дни заката эпохи медных линий. Узнаем, насколько стабильным будет соединение и будет ли оно вообще. Традиционно будет много интересного.

https://habr.com/ru/companies/timeweb/articles/812137/

#timeweb_статьи #телефон #модем #gpon #линия #rs232 #uart #xmodem #ymodem #zmodem #crc #ppp #putty #hyperterminal #norton_commander

I missed his passing last year.

https://en.m.wikipedia.org/wiki/Ward_Christensen

#Xmodem

Well, what do you know, you *can* revive the old days 😉

https://defsol.com/downloads/definite-solutions/frontdoor-re-boot

#fidonet #retrocomputing #retro #geek #frontdoor #xmodem #zmodem #lotech #hitech #lol #becauseican

Well, what do you know, you *can* revive the old days 😉

https://defsol.com/downloads/definite-solutions/frontdoor-re-boot

#fidonet #retrocomputing #retro #geek #frontdoor #xmodem #zmodem #lotech #hitech #lol #becauseican

Well, what do you know, you *can* revive the old days 😉

https://defsol.com/downloads/definite-solutions/frontdoor-re-boot

#fidonet #retrocomputing #retro #geek #frontdoor #xmodem #zmodem #lotech #hitech #lol #becauseican

Well, what do you know, you *can* revive the old days 😉

https://defsol.com/downloads/definite-solutions/frontdoor-re-boot

#fidonet #retrocomputing #retro #geek #frontdoor #xmodem #zmodem #lotech #hitech #lol #becauseican

Well, what do you know, you *can* revive the old days 😉

https://defsol.com/downloads/definite-solutions/frontdoor-re-boot

#fidonet #retrocomputing #retro #geek #frontdoor #xmodem #zmodem #lotech #hitech #lol #becauseican

Hackaday Links: November 24, 2024 https://hackaday.com/2024/11/24/hackaday-links-november-24-2024/ #HackadayColumns #perpetualmotion #WardChristensen #opticalsorting #Hackadaylinks #bulletinboard #hackadaylinks #machinevision #simulation #Smartring #timepiece #wearable #openems #XMODEM #Atmos #casio #clock #KiCAD #watch #bbs #emc

Hackaday Links: November 24, 2024 - We received belated word this week of the passage of Ward Christensen, who died un... - https://hackaday.com/2024/11/24/hackaday-links-november-24-2024/ #hackadaycolumns #perpetualmotion #wardchristensen #opticalsorting #hackadaylinks #bulletinboard #machinevision #simulation #smartring #timepiece #wearable #openems #xmodem #atmos #casio #clock #kicad #watch #bbs #emc

#WardChristiansen was one of the unkown pioneers. He, along with his friend Randy Seuss, founding the first computer #BBS in Chicago due to a snowstorm. You can read more about Ward here:

https://honoraryunsubscribe.com/ward-christensen/

#Ward also created the #XMODEM protocol in 1977. He was interviewed for the fantastic BBS Documentary by @textfiles , and appears in it at various places, starting here: https://youtu.be/Dddbe9OuJLU?feature=shared&t=405

The raw interview footage is at: https://archive.org/details/20020216-bbs-christensen

1/

Ward Christensen, BBS inventor and architect of our online age, dies at age 78 https://arstechnica.com/gadgets/2024/10/ward-christensen-bbs-inventor-and-architect-of-our-online-age-dies-at-age-78/ #RIP #XModem #BBS #RetroComputing #History

RIP Ward Christensen, another modest human that shaped our online lives more than we probably realise. https://arstechnica.com/gadgets/2024/10/ward-christensen-bbs-inventor-and-architect-of-our-online-age-dies-at-age-78/ #BBS #XMODEM

RIP Ward Christensen, co-founder of the first computer Bulletin Board System to go online and author of the XMODEM protocol, among other accolades.

https://en.wikipedia.org/wiki/Ward_Christensen

#RIP #BBS #BBSing #xmodem #filetransfer #pioneers #computinghistory #vintagecomputing #retrocomputing #computers #history

A typical #RetroComputing sunday with my #Commodore64 - first, testing #xmodem #CRC #file #transfer to #rc2014bbs and then checking out #QLink (the "reloaded" system). Unfortunately, there aren't that much services active there (anymore?!), except the community boards.

I am currently doing some testing with #rc2014bbs and there is something strange here:

#rcbox #BBS runs on a Z80 CP/M system ( #rc2014 ) and I am using the CP/M file transfer tool KMD.COM to #transfer #files to and from the system via #xmodem (CRC and 1K - both possible).

This seems to work as long as the client machine up- or downloading files is an #8bit machine: a RC2014 with #Qterm works, a #Commodore64 with #CCGMS works - but as soon as I try to use #Syncterm or #Qodem or any other modern #Linux #terminal #program the transfers fail with either "error in header" or, more often, with "CRC error".

How is this possible?! 🤔

I am currently doing some testing with #rc2014bbs and there is something strange here:

#rcbox #BBS runs on a Z80 CP/M system ( #rc2014 ) and I am using the CP/M file transfer tool KMD.COM to #transfer #files to and from the system via #xmodem (CRC and 1K - both possible).

This seems to work as long as the client machine up- or downloading files is an #8bit machine: a RC2014 with #Qterm works, a #Commodore64 with #CCGMS works - but as soon as I try to use #Syncterm or #Qodem or any other modern #Linux #terminal #program the transfers fail with either "error in header" or, more often, with "CRC error".

How is this possible?! 🤔

I am currently doing some testing with #rc2014bbs and there is something strange here:

#rcbox #BBS runs on a Z80 CP/M system ( #rc2014 ) and I am using the CP/M file transfer tool KMD.COM to #transfer #files to and from the system via #xmodem (CRC and 1K - both possible).

This seems to work as long as the client machine up- or downloading files is an #8bit machine: a RC2014 with #Qterm works, a #Commodore64 with #CCGMS works - but as soon as I try to use #Syncterm or #Qodem or any other modern #Linux #terminal #program the transfers fail with either "error in header" or, more often, with "CRC error".

How is this possible?! 🤔

I am currently doing some testing with #rc2014bbs and there is something strange here:

#rcbox #BBS runs on a Z80 CP/M system ( #rc2014 ) and I am using the CP/M file transfer tool KMD.COM to #transfer #files to and from the system via #xmodem (CRC and 1K - both possible).

This seems to work as long as the client machine up- or downloading files is an #8bit machine: a RC2014 with #Qterm works, a #Commodore64 with #CCGMS works - but as soon as I try to use #Syncterm or #Qodem or any other modern #Linux #terminal #program the transfers fail with either "error in header" or, more often, with "CRC error".

How is this possible?! 🤔

I am currently doing some testing with #rc2014bbs and there is something strange here:

#rcbox #BBS runs on a Z80 CP/M system ( #rc2014 ) and I am using the CP/M file transfer tool KMD.COM to #transfer #files to and from the system via #xmodem (CRC and 1K - both possible).

This seems to work as long as the client machine up- or downloading files is an #8bit machine: a RC2014 with #Qterm works, a #Commodore64 with #CCGMS works - but as soon as I try to use #Syncterm or #Qodem or any other modern #Linux #terminal #program the transfers fail with either "error in header" or, more often, with "CRC error".

How is this possible?! 🤔

Trying - and totally failing - to send files via #xmodem on Linux to a slightly special Z80 machine.

It's a MinZ, a 36 MHz Z180 in a tiny case. It runs CP/M, but uses a dual serial USB interface. It gives me /dev/ttyUSB0 for terminal but /dev/ttyUSB2 for xmodem transfers. It comes with patched xmodem COM files that use this second serial port. But can I get Linux to do anything but immediately disconnect?

+++ SYSOP NEWS +++ SYSOP NEWS +++ SYSOP NEWS +++

I took my time today to rework some of the menus of #rc2014bbs (RC-BOX BBS - the world's first and probably only #rc2014 based #BBS system in the world) and do a little maintenance.

There's a new tool, "FOR", which will list all #files that have recently been #uploaded via #xmodem or #ymodem

There's now also a help file in the default user area, which you can view by entering TYPE HELP.TXT on the CP/M command line.

Up-/and downloads work, but not with modern terminal clients. Use your #8bit hardware and an appropriate #terminal program with #xmodem support to successfully upload files. I have successfully tested xmodem transfers using #StrikeTerm on a Commodore 64.

See my profile for information on how to connect to RC-BOX BBS (the address is listed there)

EDIT: the C64 terminal program I used for the screenshots is "X-Term!"

Let's Make a DOS BBS in an offensively modern way [video]
https://www.youtube.com/watch?v=wLVHXn79l8M
#ycombinator #BBS #Renegade_BBS #Renegade #Kubernetes #Ceph #ArgoCD #Dosemu #DOS_workload_kuberenets #fTelnet #fidonet #xmodem #ymodem

Let's Make a DOS BBS in an offensively modern way [video]
https://www.youtube.com/watch?v=wLVHXn79l8M
#ycombinator #BBS #Renegade_BBS #Renegade #Kubernetes #Ceph #ArgoCD #Dosemu #DOS_workload_kuberenets #fTelnet #fidonet #xmodem #ymodem

Let's Make a DOS BBS in an offensively modern way [video]
https://www.youtube.com/watch?v=wLVHXn79l8M
#ycombinator #BBS #Renegade_BBS #Renegade #Kubernetes #Ceph #ArgoCD #Dosemu #DOS_workload_kuberenets #fTelnet #fidonet #xmodem #ymodem

Let's Make a DOS BBS in an offensively modern way [video]
https://www.youtube.com/watch?v=wLVHXn79l8M
#ycombinator #BBS #Renegade_BBS #Renegade #Kubernetes #Ceph #ArgoCD #Dosemu #DOS_workload_kuberenets #fTelnet #fidonet #xmodem #ymodem

Auf Linux nutzt man sowas wie #Minicom.
Was gibts vergleichbares bedienbar übers #Terminal (bevorzugt Git-#Bash) unter Windows mit dem zB #XModem gesprochen werden kann? 🤔

@bigzaphod When I started #BBSing in the early #1980s on my #Commodore64 the file transfer protocol choices were #XMODEM and #Punter, the latter largely exclusive to #Commodore #BBSes.

Trivia: XMODEM was invented by Ward Christensen, co-creator of the first #BBS