Re: [M100] Dead Model 100

[B 9]



On Thu, Nov 19, 2020 at 11:16 AM Peter Vollan  wrote:

> Wow, thanks! That did it! Happy New Year, it is January 1st 1900!
>
>
> On Wed, 18 Nov 2020 at 17:23, Robert J. Hutchins 
> wrote:
>
>> I assumed you switched off the memory voltage. Hit the reset button. This
>> is what corrupted memory does…
>>
>> Try your memory one piece at a time…
>>
>>
>>
>> *From:* M100 [mailto:m100-boun...@lists.bitchin100.com] *On Behalf Of *Peter
>> Vollan
>> *Sent:* Wednesday, November 18, 2020 12:04 PM
>> *To:* m...@bitchin100.com
>> *Subject:* [M100] Dead Model 100
>>
>>
>>
>> * modelt.jpg
>> *
>>
>>
>>
>> This is what my Model 100s screen looks like now. I cold started, removed
>> the REX and even swapped out another main ROM and no change. I was using
>> TS-DOS to download files from Dlplus when it happened although I have no
>> idea if that is the reason. Anyone have any ideas? Anyone do repairs? Sorry
>> to burden everyone with my problems.
>>
>>
>>
>

Re: [M100] M100 overclock

[Stephen Adolph]

I got my first 5MHz NSC800 adapter board back today.  I have one built and
installed in an M100 dedicated to CP/M.  It worked as planned.

The only mods to the M100 were-
1.  Remove 80c85 and install socket
2.  Install Z80 version of M100 OS in 100nsec eprom
3. And of course RECXPM for ram.

I have a design done for an 80c85 board as well, but I'm not sure if I will
get them built.  I probably will, if only to complete the project.

It certainly is fast!  Feels pretty nice indeed.
I'm just going to use it and observe.  It should be fine.  One thing... the
faster speed does soak up more current.  I see a jump from about 60mA to
about 85 mA.

Also, my BCR port hack for serial video now runs at 115200 Baud2x
faster.

I suppose that the regular serial port can now run reliably at 76800 baud.
May test that.

Cassette port will be non functional for several reasons!  The 2x speed
definitely kills that...as does the lack of SID and SOD on the NSC800.

Sound in general is 2x higher pitch.  Modem rates themselves are unchanged.

Anyhow, all in all, a reasonable set of tradeoffs for a 2x speed up.

Re: [M100] Anyone selling dead Model 100 (shells or otherwise)?

[Benjamin Forster]

The reel to reel collection is audio. I collected a lot in the late 1990s and 
early 2000s, and my wife has been complaining that the entire basement has 
become a man-cave.
Ben
P.S. She does enjoy the music!

From: M100  on behalf of Jim Anderson 

Sent: November 19, 2020 1:35 PM
To: m...@bitchin100.com 
Subject: Re: [M100] Anyone selling dead Model 100 (shells or otherwise)?

> -Original Message-
> Nice thought Robert, but I don't have any parted out and don't have time
> to do that; right now I am completely occupied selling off bits and
> pieces of my reel-to-reel collection

Audio or data?  ;)

> Josh: All I know about the 200 is that it seems to power up and
> occasionally shows the directory; otherwise the screen blacks out (i.e.
> all the pixels go black at the same time -- from what I remember,  I
> think there is rolling bar that shows as well).

Kinda sounds like the symptoms of a bad memory nicd (I get the same thing on 
T200 when the memory supercap isn't charged after it's been sitting without 
batteries; this is why I'm going to change the supercap back to a nimh battery 
because the T200 doesn't handle lack of memory battery voltage very well).  
Does it refuse to power off when you press the power button while the screen is 
rolling/flickering?







jim

Re: [M100] Dead Model 100

[Peter Vollan]

Wow, thanks! That did it! Happy New Year, it is January 1st 1900!


On Wed, 18 Nov 2020 at 17:23, Robert J. Hutchins 
wrote:

> I assumed you switched off the memory voltage. Hit the reset button. This
> is what corrupted memory does…
>
> Try your memory one piece at a time…
>
>
>
> *From:* M100 [mailto:m100-boun...@lists.bitchin100.com] *On Behalf Of *Peter
> Vollan
> *Sent:* Wednesday, November 18, 2020 12:04 PM
> *To:* m...@bitchin100.com
> *Subject:* [M100] Dead Model 100
>
>
>
> * modelt.jpg
> *
>
>
>
> This is what my Model 100s screen looks like now. I cold started, removed
> the REX and even swapped out another main ROM and no change. I was using
> TS-DOS to download files from Dlplus when it happened although I have no
> idea if that is the reason. Anyone have any ideas? Anyone do repairs? Sorry
> to burden everyone with my problems.
>
>
>

Re: [M100] Anyone selling dead Model 100 (shells or otherwise)?

[Jim Anderson]

> -Original Message-
> Nice thought Robert, but I don't have any parted out and don't have time
> to do that; right now I am completely occupied selling off bits and
> pieces of my reel-to-reel collection

Audio or data?  ;)

> Josh: All I know about the 200 is that it seems to power up and
> occasionally shows the directory; otherwise the screen blacks out (i.e.
> all the pixels go black at the same time -- from what I remember,  I
> think there is rolling bar that shows as well).

Kinda sounds like the symptoms of a bad memory nicd (I get the same thing on 
T200 when the memory supercap isn't charged after it's been sitting without 
batteries; this is why I'm going to change the supercap back to a nimh battery 
because the T200 doesn't handle lack of memory battery voltage very well).  
Does it refuse to power off when you press the power button while the screen is 
rolling/flickering?







jim

Re: [M100] M102 TANDY + TS-DOS + TPDD 100k issue

[jp.vanroy]

Hi Brian,

thank you for the info.

Jean – Pierre



From: Brian White 
Sent: Wednesday, November 18, 2020 11:28 PM
To: m...@bitchin100.com 
Subject: Re: [M100] M102 TANDY + TS-DOS + TPDD 100k issue

It's possible they made a EU version of TS-DOS that just isn't very common or 
documented. We have seen other special versions of things like that.

On Wed, Nov 18, 2020, 2:28 PM  wrote:

  Steve,

  ok, I understand better now, thank you.

  I am not aware of the software architecture inside the ROM, so for now, I 
can’t understand the program from Microsoft
  (and this is the same for TS-DOS) without spend months to analyse and try to 
decode the soft.
  But anyway, I am happy that Kurt and you agreed to the fact that TS-DOS was 
certainly not compatible with my EU version.
  Thank you infinitely for all your help and time.

  Jean – Pierre

  From: Stephen Adolph 
  Sent: Wednesday, November 18, 2020 8:14 PM
  To: m...@bitchin100.com 
  Subject: Re: [M100] M102 TANDY + TS-DOS + TPDD 100k issue

  Jean-Pierre, 

  I think when I looked at the ROM, the sections that were different included 
the TELCOM section, and I assume that it means the modem tone generation is 
different.  That implies the RC filter networks on the modem circuitry would 
also be different.
  I can't say for sure but I believe the ROM functions are written to match the 
analog capabilities of the modem itself.

  but who uses the modem anyways!

  ..Steve



  On Wed, Nov 18, 2020 at 1:51 PM  wrote:


Yes, I don’t take into account that the ASCII character table was extended 
for EU, very interesting !

I am a litle bit surprised that Traveling software don’t think about the 
European version but after all,
this is normal because in the past, we are not a market of big concern and 
Traveling can not support
to write code for a such little market.

Steve, you say that the modem will be no more usable if I replace the 
European ROM image; can you explain why ?

By the way,  here is the link for the pictures of the machine :

https://e.pcloud.link/publink/show?code=kZ4pH7Z2uHNY094ADm5E2Kv3ccp2Vct8OcX


Jean – Pierre



From: Kurt McCullum 
Sent: Wednesday, November 18, 2020 5:15 PM
To: m100@lists.bitchin100.com 
Subject: Re: [M100] M102 TANDY + TS-DOS + TPDD 100k issue

Most likely, the folks at Traveling Software didn't take into account the 
EU version. Or perhaps they were unaware of it. Those details are likely lost 
to time. 


As for compatibility. I would check the model number on the main board to 
make sure it matches the US mainboard. If not, there could be issues. Hopefully 
the ROM patch was something specific to EU use such as the extended ASCII 
character table.


Kurt

On Wed, Nov 18, 2020, at 8:12 AM, jp.van...@belgacom.net wrote:

  Yes, I have compared the ROM provided with Virtual T and my own ROM and 
effectively, she are differents.

  Like I say to Steve, I wonder if, maybe, I can burn the VIRTUAL T M102 
ROM inside a 27C256 to make a try ?

  Naturally, there is a risk of hardware incompatibility, so, this is maybe 
not a good idea.


   

   
  This is very strange that Microsoft did an another version of ROM for the 
European version.


   

   
  Jean – Pierre


   

   

   
  From: Stephen Adolph

  Sent: Wednesday, November 18, 2020 5:00 PM

  To: m...@bitchin100.com

  Cc: Model 100 Discussion

  Subject: Re: [M100] M102 TANDY + TS-DOS + TPDD 100k issue


   
  yah, we know the rom is different.  Already compared.

  So, maybe that EU ROM is not really compatible with TS-DOS.


   

   
  On Wed, Nov 18, 2020 at 10:59 AM Kurt McCullum  wrote:



When using the ROM you sent, Virtual-T does crash like you indicated. 
I'm comparing the ROMs right now. They are different. The first byte I found 
that was different is at 0395h. I'll see what else I can find.


 
Kurt


 
On Wed, Nov 18, 2020, at 7:59 AM, jp.van...@belgacom.net wrote:

  I dumped the image directly from my ROM with a little program 
provided by Steve.



   


   
  From: Brian White

  Sent: Wednesday, November 18, 2020 4:53 PM

  To: m...@bitchin100.com

  Subject: Re: [M100] M102 TANDY + TS-DOS + TPDD 100k issue



   
  Did you actually dump this from your machine? Or is this just on of 
the archived copies like from the rex documentation wiki pages? 



   


   


   
  On Wed, Nov 18, 2020, 10:41 AM  wrote:

Here is the ROM image.



 
Thank you for the test !



 


 
Jean – Pierre



 


 
From: Kurt McCullum

Sent: Wednesday, November 18, 2020 4:26 PM

To: m100@lists.bitchin100.com

Subject: Re: [M100]