Re: [M100] Convert integer to string WITHOUT leading space?

[John R. Hogerhuis]

On Mon, Jul 10, 2023, 1:35 PM Joshua O'Keefe 
wrote:

> On Jul 9, 2023, at 7:22 PM, John R. Hogerhuis  wrote:
>
> MID$(STR$(A%),2+(A%<0))
>
>
> This is a lovely, compact way to address something I’ve used a verbose
> solution for.  Thank you!
>

You're welcome. It's nice when you can find something minimal like that...
it is as if it was there waiting for you.

-- John.





-- John.

Re: [M100] Intermittent problem at higher baud rates on RS-232 interface

[birt_j]

Yes, the M100 caps always need to be replaced. The RS232 output puts a 
significant load on the -5V which makes for flaky LCD and RS232 operation. If 
there are any traces under/around the caps that look dark they need to be 
mechanically cleaned and neutralized (if corrosion was bad) to stave off 
further corrosion. I have done a few videos on M100 recapping describing the 
process. 

Jeff

 

From: M100  On Behalf Of Jesse Bertier
Sent: Monday, July 10, 2023 12:57 PM
To: m...@bitchin100.com
Subject: Re: [M100] Intermittent problem at higher baud rates on RS-232 
interface

 

Hi Jeff,

 

Thank you - I noted my serial # was after the 30601 mark, and verified the 
330 ohm resistors are in fact on my board.  I then took a closer look over the 
board and noticed just about every electrolytic cap leaked.  The flipflop near 
the power supply area was also warm, so I powered it off and may order some 
caps.  I’m thinking at this point a recap before digging into the RS-232 port 
any further would be a good place to start.  

 

This is a fantastic group, thank you all for the replies!





On Jul 9, 2023, at 7:12 PM, mailto:bir...@soigeneris.com> > mailto:bir...@soigeneris.com> > wrote:

 

The TPDD1, TPDD2, Backpack, etc. use 19200 successfully. If you can adjust the 
intercharacter delay on the TNC is might help. Also note that some early M100s 
had the wrong resistors in the output lines for the RS232 port. They fitted 
5.6K from factory but they quickly revised that down to 330ohm as some devise 
would not work with it. 

I did a video on the factory mod a while back. A link to the technical bulletin 
is in the video description:

https://youtu.be/KPFnwv_nDD8

 

Jeff Birt

 

From: M100 mailto:m100-boun...@lists.bitchin100.com> > On Behalf Of Gregory McGill
Sent: Sunday, July 9, 2023 5:40 PM
To: m...@bitchin100.com  
Subject: Re: [M100] Intermittent problem at higher baud rates on RS-232 
interface

 

there's no hardware flow control on the 100 with telcom

use a better terminal and hardware flow control at any baud rate over 2400 

 

 

On Sun, Jul 9, 2023 at 3:19 PM Jesse Bertier mailto:berti...@gmail.com> > wrote:

First time getting my hands on a model T.  I am attempting to connect to a TNC 
at 9600 baud.  I have both matched for 8,N,1 and 9600 baud.  TNC works with 
other PCs.  I’m using TELCOM and set the parameters correctly.  What happens at 
9600 baud is the text coming into the m100 is garbled mostly and on occasion 
some valid words come across.  When I set both to 300 baud, works perfectly.   
It seems to be problematic if there’s a solid block of text coming in, like a 
string of 20-30 words for example.  

Before I dig into the problem with the service manual and get out the scope, 
does anyone know if these are supposed to work well at 9600 or up to 19,200 ?  
Or, does the buffer or machine get overloaded at higher rates?  Is TELCOM the 
issue? 

Sent from my iPhone

 

Re: [M100] Convert integer to string WITHOUT leading space?

[Joshua O'Keefe]

> On Jul 9, 2023, at 7:22 PM, John R. Hogerhuis  wrote:
> 
> MID$(STR$(A%),2+(A%<0))

This is a lovely, compact way to address something I’ve used a verbose solution 
for.  Thank you!

Re: [M100] Convert integer to string WITHOUT leading space?

[Peter Vollan]

This is even detailed in the entry for STR$ on page 182 of the Model 100
manual. There is a blank if positive, a minus if negative, and this turns
up on many early Microsoft products. Thanks, Bill.

On Sun, 9 Jul 2023 at 19:24, John R. Hogerhuis  wrote:

>
> Less messy... or at least faster:
>
> If you know A% is always positive:
> MID$(STR$(A%,2))
>
> If you don't know:
> MID$(STR$(A%),2+(A%<0))
>
> -- John.
>

Re: [M100] Convert integer to string WITHOUT leading space?

[lloydelmer]

Nice!  

 

From: M100  On Behalf Of John R. Hogerhuis
Sent: Sunday, July 9, 2023 9:23 PM
To: m...@bitchin100.com
Subject: Re: [M100] Convert integer to string WITHOUT leading space?

 

 

Less messy... or at least faster:

 

If you know A% is always positive:

MID$(STR$(A%,2))

 

If you don't know:
MID$(STR$(A%),2+(A%<0))

 

-- John.

Re: [M100] Intermittent problem at higher baud rates on RS-232 interface

[Gregory McGill]

i have cap kits in my store arcadeshopper.com

On Mon, Jul 10, 2023 at 10:58 AM Jesse Bertier  wrote:

> Hi Jeff,
>
> Thank you - I noted my serial # was after the 30601 mark, and verified
> the 330 ohm resistors are in fact on my board.  I then took a closer look
> over the board and noticed just about every electrolytic cap leaked.  The
> flipflop near the power supply area was also warm, so I powered it off and
> may order some caps.  I’m thinking at this point a recap before digging
> into the RS-232 port any further would be a good place to start.
>
> This is a fantastic group, thank you all for the replies!
>
> On Jul 9, 2023, at 7:12 PM,  
> wrote:
>
> The TPDD1, TPDD2, Backpack, etc. use 19200 successfully. If you can adjust
> the intercharacter delay on the TNC is might help. Also note that some
> early M100s had the wrong resistors in the output lines for the RS232 port.
> They fitted 5.6K from factory but they quickly revised that down to 330ohm
> as some devise would not work with it.
>
> I did a video on the factory mod a while back. A link to the technical
> bulletin is in the video description:
>
> https://youtu.be/KPFnwv_nDD8
>
> Jeff Birt
>
> *From:* M100  *On Behalf Of *Gregory
> McGill
> *Sent:* Sunday, July 9, 2023 5:40 PM
> *To:* m...@bitchin100.com
> *Subject:* Re: [M100] Intermittent problem at higher baud rates on RS-232
> interface
>
> there's no hardware flow control on the 100 with telcom
> use a better terminal and hardware flow control at any baud rate over 2400
>
>
> On Sun, Jul 9, 2023 at 3:19 PM Jesse Bertier  wrote:
>
> First time getting my hands on a model T.  I am attempting to connect to a
> TNC at 9600 baud.  I have both matched for 8,N,1 and 9600 baud.  TNC works
> with other PCs.  I’m using TELCOM and set the parameters correctly.  What
> happens at 9600 baud is the text coming into the m100 is garbled mostly and
> on occasion some valid words come across.  When I set both to 300 baud,
> works perfectly.   It seems to be problematic if there’s a solid block of
> text coming in, like a string of 20-30 words for example.
>
> Before I dig into the problem with the service manual and get out the
> scope, does anyone know if these are supposed to work well at 9600 or up to
> 19,200 ?  Or, does the buffer or machine get overloaded at higher rates?
> Is TELCOM the issue?
>
> Sent from my iPhone
>
>
>

Re: [M100] Intermittent problem at higher baud rates on RS-232 interface

[Peter Vollan]

stat 98n1,e

On Sun, 9 Jul 2023 at 15:40, Gregory McGill  wrote:

> there's no hardware flow control on the 100 with telcom
> use a better terminal and hardware flow control at any baud rate over 2400
>
>
> On Sun, Jul 9, 2023 at 3:19 PM Jesse Bertier  wrote:
>
>> First time getting my hands on a model T.  I am attempting to connect to
>> a TNC at 9600 baud.  I have both matched for 8,N,1 and 9600 baud.  TNC
>> works with other PCs.  I’m using TELCOM and set the parameters correctly.
>> What happens at 9600 baud is the text coming into the m100 is garbled
>> mostly and on occasion some valid words come across.  When I set both to
>> 300 baud, works perfectly.   It seems to be problematic if there’s a solid
>> block of text coming in, like a string of 20-30 words for example.
>>
>> Before I dig into the problem with the service manual and get out the
>> scope, does anyone know if these are supposed to work well at 9600 or up to
>> 19,200 ?  Or, does the buffer or machine get overloaded at higher rates?
>> Is TELCOM the issue?
>>
>> Sent from my iPhone
>
>

Re: [M100] Intermittent problem at higher baud rates on RS-232 interface

[Peter Vollan]

What about software flow control?

On Sun, 9 Jul 2023 at 15:40, Gregory McGill  wrote:

> there's no hardware flow control on the 100 with telcom
> use a better terminal and hardware flow control at any baud rate over 2400
>
>
> On Sun, Jul 9, 2023 at 3:19 PM Jesse Bertier  wrote:
>
>> First time getting my hands on a model T.  I am attempting to connect to
>> a TNC at 9600 baud.  I have both matched for 8,N,1 and 9600 baud.  TNC
>> works with other PCs.  I’m using TELCOM and set the parameters correctly.
>> What happens at 9600 baud is the text coming into the m100 is garbled
>> mostly and on occasion some valid words come across.  When I set both to
>> 300 baud, works perfectly.   It seems to be problematic if there’s a solid
>> block of text coming in, like a string of 20-30 words for example.
>>
>> Before I dig into the problem with the service manual and get out the
>> scope, does anyone know if these are supposed to work well at 9600 or up to
>> 19,200 ?  Or, does the buffer or machine get overloaded at higher rates?
>> Is TELCOM the issue?
>>
>> Sent from my iPhone
>
>

Re: [M100] Intermittent problem at higher baud rates on RS-232 interface

[Jesse Bertier]

Hi Jeff,

Thank you - I noted my serial # was after the 30601 mark, and verified the 
330 ohm resistors are in fact on my board.  I then took a closer look over the 
board and noticed just about every electrolytic cap leaked.  The flipflop near 
the power supply area was also warm, so I powered it off and may order some 
caps.  I’m thinking at this point a recap before digging into the RS-232 port 
any further would be a good place to start.  

This is a fantastic group, thank you all for the replies!

> On Jul 9, 2023, at 7:12 PM,   
> wrote:
> 
> The TPDD1, TPDD2, Backpack, etc. use 19200 successfully. If you can adjust 
> the intercharacter delay on the TNC is might help. Also note that some early 
> M100s had the wrong resistors in the output lines for the RS232 port. They 
> fitted 5.6K from factory but they quickly revised that down to 330ohm as some 
> devise would not work with it. 
> 
> I did a video on the factory mod a while back. A link to the technical 
> bulletin is in the video description:
> 
> https://youtu.be/KPFnwv_nDD8
>  
> Jeff Birt
>  
> From: M100  > On Behalf Of Gregory McGill
> Sent: Sunday, July 9, 2023 5:40 PM
> To: m...@bitchin100.com 
> Subject: Re: [M100] Intermittent problem at higher baud rates on RS-232 
> interface
>  
> there's no hardware flow control on the 100 with telcom
> use a better terminal and hardware flow control at any baud rate over 2400 
>  
>  
> On Sun, Jul 9, 2023 at 3:19 PM Jesse Bertier  > wrote:
>> First time getting my hands on a model T.  I am attempting to connect to a 
>> TNC at 9600 baud.  I have both matched for 8,N,1 and 9600 baud.  TNC works 
>> with other PCs.  I’m using TELCOM and set the parameters correctly.  What 
>> happens at 9600 baud is the text coming into the m100 is garbled mostly and 
>> on occasion some valid words come across.  When I set both to 300 baud, 
>> works perfectly.   It seems to be problematic if there’s a solid block of 
>> text coming in, like a string of 20-30 words for example.  
>> 
>> Before I dig into the problem with the service manual and get out the scope, 
>> does anyone know if these are supposed to work well at 9600 or up to 19,200 
>> ?  Or, does the buffer or machine get overloaded at higher rates?  Is TELCOM 
>> the issue? 
>> 
>> Sent from my iPhone

Re: [M100] Intermittent problem at higher baud rates on RS-232 interface

[Brian Brindle]

And of course I didn't see my mistake until seconds after hitting send..
The settings to enable flow control are STAT 88N1E - sorry about that.



On Mon, Jul 10, 2023 at 7:02 AM Brian Brindle  wrote:

> Hey Jesse - congrats on getting the model T! They make great packet
> stations for sure. The issue you are describing sounds like a flow control
> one. Depending on what TNC you are using you should be able to activate
> XON/XOFF. On my old Timewave I think the command is XFLOW ON.
>
> Then just ensure that you have flow control enabled in TERM with STAT
> 88N1D (For 9600 bps) and you should be good to go.
>
> Great to see other amateurs on the list and I know you are going to love
> the M100 as a tool. My club used them and the LOGBA program for field day
> this year and it worked out fantastic. Can't beat that screen and battery
> life.
>
> 73 - DE KW4KB
>
> Brian
>
>
> On Sun, Jul 9, 2023 at 6:20 PM Jesse Bertier  wrote:
>
>> First time getting my hands on a model T.  I am attempting to connect to
>> a TNC at 9600 baud.  I have both matched for 8,N,1 and 9600 baud.  TNC
>> works with other PCs.  I’m using TELCOM and set the parameters correctly.
>> What happens at 9600 baud is the text coming into the m100 is garbled
>> mostly and on occasion some valid words come across.  When I set both to
>> 300 baud, works perfectly.   It seems to be problematic if there’s a solid
>> block of text coming in, like a string of 20-30 words for example.
>>
>> Before I dig into the problem with the service manual and get out the
>> scope, does anyone know if these are supposed to work well at 9600 or up to
>> 19,200 ?  Or, does the buffer or machine get overloaded at higher rates?
>> Is TELCOM the issue?
>>
>> Sent from my iPhone
>
>

Re: [M100] Intermittent problem at higher baud rates on RS-232 interface

[Brian Brindle]

Hey Jesse - congrats on getting the model T! They make great packet
stations for sure. The issue you are describing sounds like a flow control
one. Depending on what TNC you are using you should be able to activate
XON/XOFF. On my old Timewave I think the command is XFLOW ON.

Then just ensure that you have flow control enabled in TERM with STAT 88N1D
(For 9600 bps) and you should be good to go.

Great to see other amateurs on the list and I know you are going to love
the M100 as a tool. My club used them and the LOGBA program for field day
this year and it worked out fantastic. Can't beat that screen and battery
life.

73 - DE KW4KB

Brian


On Sun, Jul 9, 2023 at 6:20 PM Jesse Bertier  wrote:

> First time getting my hands on a model T.  I am attempting to connect to a
> TNC at 9600 baud.  I have both matched for 8,N,1 and 9600 baud.  TNC works
> with other PCs.  I’m using TELCOM and set the parameters correctly.  What
> happens at 9600 baud is the text coming into the m100 is garbled mostly and
> on occasion some valid words come across.  When I set both to 300 baud,
> works perfectly.   It seems to be problematic if there’s a solid block of
> text coming in, like a string of 20-30 words for example.
>
> Before I dig into the problem with the service manual and get out the
> scope, does anyone know if these are supposed to work well at 9600 or up to
> 19,200 ?  Or, does the buffer or machine get overloaded at higher rates?
> Is TELCOM the issue?
>
> Sent from my iPhone