MT MODEM by Darrell Pelan

49 views
Skip to first unread message

Les Bird

unread,
Nov 4, 2021, 6:47:50 PM11/4/21
to SEBHC
Darrell, going through my collection of disks and came across this disk with your name on it. Nice job! (Big thumbs up)

IMG_0162.JPG

Joseph Travis

unread,
Nov 4, 2021, 8:42:57 PM11/4/21
to se...@googlegroups.com
eMpTy modem... Is that a null device?  ;)



On Thu, Nov 4, 2021 at 6:47 PM Les Bird <lesb...@gmail.com> wrote:
Darrell, going through my collection of disks and came across this disk with your name on it. Nice job! (Big thumbs up)

IMG_0162.JPG

--
You received this message because you are subscribed to the Google Groups "SEBHC" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/5a1bf631-195d-47d3-a201-c173bc1066d3n%40googlegroups.com.

Darrell Pelan

unread,
Nov 4, 2021, 10:18:53 PM11/4/21
to SEBHC
Les, 
Thanks! A nice blast from the past :-)

  Darrell

Kenneth L. Owen tx836519

unread,
Nov 6, 2021, 11:14:41 AM11/6/21
to se...@googlegroups.com

Hi All,

 

Since the topic deals with modem programs for Heath, I am curious about what some of you may be using for a modem on Windows 10 to talk to the Heaths?

 

  • ken

 

Sent from Mail for Windows

 

From: Joseph Travis
Sent: Thursday, November 4, 2021 8:43 PM
To: se...@googlegroups.com
Subject: Re: [sebhc] MT MODEM by Darrell Pelan

 

eMpTy modem... Is that a null device?  ;)

 

 

 

On Thu, Nov 4, 2021 at 6:47 PM Les Bird <lesb...@gmail.com> wrote:

Darrell, going through my collection of disks and came across this disk with your name on it. Nice job! (Big thumbs up)

 

--
You received this message because you are subscribed to the Google Groups "SEBHC" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/5a1bf631-195d-47d3-a201-c173bc1066d3n%40googlegroups.com.

--
You received this message because you are subscribed to the Google Groups "SEBHC" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.

IMG_0162.JPG

Darrell Pelan

unread,
Nov 6, 2021, 12:29:45 PM11/6/21
to SEBHC
I'm using Absolute Telnet. It handles com ports and telnet sessions well.

Joseph Travis

unread,
Nov 6, 2021, 1:20:43 PM11/6/21
to se...@googlegroups.com
TeraTerm

To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/122122803.280019.1636211679464%40bellsouth.net.

Mike Enkelis

unread,
Nov 6, 2021, 3:30:12 PM11/6/21
to se...@googlegroups.com
‘putty’. Does com ports and SSH.
From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Joseph Travis <jtravi...@gmail.com>
Sent: Saturday, November 6, 2021 10:20:30 AM
To: se...@googlegroups.com <se...@googlegroups.com>

Glenn Roberts

unread,
Nov 6, 2021, 5:58:46 PM11/6/21
to <sebhc@googlegroups.com>
For a quick console connection I use TeraTerm as long as I don't need h19 functions

If I need h19 function I usually just use the real thing, though I've tried both George's and Les' emulators.

For emulating cassette file transfer I use Realterm

Other than that, I don't use modem programs for file transfer. I use USB flash sticks and the VDIP interface

To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/CAGQDgBApL8u5tyxWbAx1LmLZjyYxj9Mj%2BmCprg7UYFfm2cpZhQ%40mail.gmail.com.

Kenneth L. Owen tx836519

unread,
Nov 6, 2021, 6:08:04 PM11/6/21
to se...@googlegroups.com

Hi Joseph,

 

I downloaded TeraTerm and set up the Com port and baud.  It is communicating with the H8 both ways using the keyboard.  But, I haven’t been able to get it to send a file to the H8 using Z-modem.  It doesn’t seem to sent the Z-modem code to the H8 to receive the file.  It just starts sending giving garbage on the H-19.  Do you use it for Z-modem transfers?

 

  • ken

 

Sent from Mail for Windows

 

From: Joseph Travis
Sent: Saturday, November 6, 2021 1:20 PM
To: se...@googlegroups.com
Subject: Re: [sebhc] MT MODEM by Darrell Pelan

 

TeraTerm

 

On Sat, Nov 6, 2021, 11:14 AM Kenneth L. Owen tx836519 <tx83...@bellsouth.net> wrote:

Hi All,

 

Since the topic deals with modem programs for Heath, I am curious about what some of you may be using for a modem on Windows 10 to talk to the Heaths?

 

  • ken

 

Sent from Mail for Windows

 

From: Joseph Travis
Sent: Thursday, November 4, 2021 8:43 PM
To: se...@googlegroups.com
Subject: Re: [sebhc] MT MODEM by Darrell Pelan

 

eMpTy modem... Is that a null device?  ;)

 

 

 

On Thu, Nov 4, 2021 at 6:47 PM Les Bird <lesb...@gmail.com> wrote:

Darrell, going through my collection of disks and came across this disk with your name on it. Nice job! (Big thumbs up)

 

--

You received this message because you are subscribed to the Google Groups "SEBHC" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/5a1bf631-195d-47d3-a201-c173bc1066d3n%40googlegroups.com.

--
You received this message because you are subscribed to the Google Groups "SEBHC" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/CAGQDgBCRh_zs7jG%3Djy2NjdRx_Cp7gdj4cbfik11fMX6sDUAA8g%40mail.gmail.com.

 

--
You received this message because you are subscribed to the Google Groups "SEBHC" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/122122803.280019.1636211679464%40bellsouth.net.

--
You received this message because you are subscribed to the Google Groups "SEBHC" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.

Mike Enkelis

unread,
Nov 6, 2021, 6:31:29 PM11/6/21
to se...@googlegroups.com
I believe that the H8 used Xmodem protocol, at least that’s what MAPLE from HUG used.
BTW in the early days of computers I founded a computer group in Portland Oregon and one of the members was Chuck Forsberg who later created the Zmodem protocol.

From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Kenneth L. Owen tx836519 <tx83...@bellsouth.net>
Sent: Saturday, November 6, 2021 3:08:01 PM
To: se...@googlegroups.com <se...@googlegroups.com>
Subject: RE: [sebhc] MT MODEM by Darrell Pelan
 

Kenneth L. Owen tx836519

unread,
Nov 6, 2021, 9:40:47 PM11/6/21
to se...@googlegroups.com

Hi Mike,

 

Yes, HDOS used Maple which was Xmodem on port 330Q.  I modified Maple’s port for a version that used port 340Q so I didn’t have to re-cable after using the H8D utility.

I using ZMP on the CP/M systems and like to use Zmodem so I can do the entire transfer from the sending machine.  TeraTerm has Zmodem protocol, but not all of the Zmodem functionality or I just haven’t set something up correctly.

 

  • ken

 

Sent from Mail for Windows

 

From: Mike Enkelis
Sent: Saturday, November 6, 2021 6:31 PM
To: se...@googlegroups.com
Subject: Re: [sebhc] MT MODEM by Darrell Pelan

 

I believe that the H8 used Xmodem protocol, at least that’s what MAPLE from HUG used.

BTW in the early days of computers I founded a computer group in Portland Oregon and one of the members was Chuck Forsberg who later created the Zmodem protocol.

 

Mike Enkelis

unread,
Nov 7, 2021, 12:13:07 AM11/7/21
to se...@googlegroups.com
Yes I also used Tera-Term to transfer programs from Windows-10 to my H89.
Maple (CP/M) only supports simple Xmodem file send/receive of a single file at a time.

I have ZMP, but not correctly configured for the H89 comm port yet (not receiving data).
If you can post the port mods that would help me.

The other reason why I used Maple is that it’s interrupt driven and buffered serial port
along with the 16550 UART’s large fifo buffer allow for faster data transfer.

I 
From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Kenneth L. Owen tx836519 <tx83...@bellsouth.net>
Sent: Saturday, November 6, 2021 6:40:40 PM

Mike Enkelis

unread,
Nov 7, 2021, 12:17:14 AM11/7/21
to se...@googlegroups.com
One thing about TeriTerm and multiple files is to configure the serial port for HARDWARE handshake,
using Xon/Xoff handshake disables multi-file transfer. 
From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Kenneth L. Owen tx836519 <tx83...@bellsouth.net>
Sent: Saturday, November 6, 2021 6:40:40 PM

Mike Enkelis

unread,
Nov 9, 2021, 5:36:29 PM11/9/21
to se...@googlegroups.com
I have made a custom overlay for ZMP.COM for the H89 that allows using DCE or DTE ports up to 57600 baud, and if the UART is a 16550 will enable the FIFO in the chip.
I have tested sending files at full speed with a “Zmodem” protocol 
But it times out trying to receive from remote computer. 

Michael Enkelis
From: Mike Enkelis <mike.e...@gmail.com>
Sent: Saturday, November 6, 2021 9:17:10 PM
To: se...@googlegroups.com <se...@googlegroups.com>

Joseph Travis

unread,
Nov 9, 2021, 9:35:30 PM11/9/21
to se...@googlegroups.com
Hi Ken,

I just read your message to me, 'sorry if I had missed it earlier.  No, I don't use TeraTerm for ZMODEM transfers with the H8.  I had been using it as the terminal for the H8 when creating programs in BHBASIC or MBASIC.  I could do program editing on my laptop then send it to the H8 (while in BASIC) just as if it was being typed in.  It's relatively fast, easy and I don't need to worry about the end of line differences (CR vs LF).  I did have to throttle the sending the file by adding 1 mS to each character and 10 mS per line.  BHBASIC may appear to have difficulty keeping up but it's really OK unless there is an error in your code.  Once it's downloaded, you can save it to disk in the normal fashion.

Regards,
Joe Travis n6ypc

To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/173486093.223342.1636249246063%40bellsouth.net.
Reply all
Reply to author
Forward
0 new messages