Re: [M100] Clock Doubler Video

[Stephen Adolph]

no, I don't think that is a valid explanation.
The modification indeed drives the display twice as fast and works for text.

Perhaps it is time to read the LCD driver chip datasheets again.
Steve

On Wed, Feb 21, 2024 at 6:57 PM Ken St. Cyr  wrote:

> Re Starblaze, someone left the following comment on the video:
>
> "I suspect the game display doesn't work because it's already driving the
> LCD controller at close to its maximum bandwidth at 2.5MHz."
>
> Does anyone know if this is indeed the case? I would've thought other
> things would've broken as well, but everything else I've tried runs
> normally. Unless Starblaze is doing something to refresh the display more
> quickly than other games/apps?
>
> //Ken S.
>
>
> --
> *From:* M100  on behalf of
> bir...@soigeneris.com 
> *Sent:* Friday, February 16, 2024 6:23 PM
> *To:* m...@bitchin100.com 
> *Subject:* Re: [M100] Clock Doubler Video
>
>
> Even at the normal clock rates the TS-DOS timing issues can cause lock
> ups. In normal use one might only stumble on this occasionally. I noticed
> this testing Backpack drives when I’m doing a lot of the same operations
> over and over again.
>
> It seems to stem around pressing the next button you want before it is
> down drawing the screen. If I don’t get in a hurry and wait for a second
> after each screen is drawn it never locks up. I suspect that the faster
> clock exacerbates this latent bug.
>
>
>
> Jeff Birt
>
>
>
> *From:* M100  *On Behalf Of *Stephen
> Adolph
> *Sent:* Friday, February 16, 2024 2:16 PM
> *To:* m...@bitchin100.com
> *Subject:* Re: [M100] Clock Doubler Video
>
>
>
> Ken ,
>
> What a great job you've done!  Thank you sir.
>
> You really did a nice job with the assembly and commentary on how to
> install it.
>
> At some point I have to find out why Starblaze video is broken
>
> I'm adding the upgrade to all my machines to try and get as much
> experience with it as possible.
>
>
>
> I have noticed that TSDOS sometimes does not work in 5MHz mode, whereas
> Teeny does.  So that has to be a software and timing issue to sort out.
>
>
>
> Thanks again Ken!  Cheers Steve
>
>
>
>

Re: [M100] Clock Doubler Video

[Ken St. Cyr]

Re Starblaze, someone left the following comment on the video:

"I suspect the game display doesn't work because it's already driving the LCD 
controller at close to its maximum bandwidth at 2.5MHz."

Does anyone know if this is indeed the case? I would've thought other things 
would've broken as well, but everything else I've tried runs normally. Unless 
Starblaze is doing something to refresh the display more quickly than other 
games/apps?

//Ken S.



From: M100  on behalf of 
bir...@soigeneris.com 
Sent: Friday, February 16, 2024 6:23 PM
To: m...@bitchin100.com 
Subject: Re: [M100] Clock Doubler Video


Even at the normal clock rates the TS-DOS timing issues can cause lock ups. In 
normal use one might only stumble on this occasionally. I noticed this testing 
Backpack drives when I’m doing a lot of the same operations over and over again.

It seems to stem around pressing the next button you want before it is down 
drawing the screen. If I don’t get in a hurry and wait for a second after each 
screen is drawn it never locks up. I suspect that the faster clock exacerbates 
this latent bug.



Jeff Birt



From: M100  On Behalf Of Stephen Adolph
Sent: Friday, February 16, 2024 2:16 PM
To: m...@bitchin100.com
Subject: Re: [M100] Clock Doubler Video



Ken ,

What a great job you've done!  Thank you sir.

You really did a nice job with the assembly and commentary on how to install it.

At some point I have to find out why Starblaze video is broken

I'm adding the upgrade to all my machines to try and get as much experience 
with it as possible.



I have noticed that TSDOS sometimes does not work in 5MHz mode, whereas Teeny 
does.  So that has to be a software and timing issue to sort out.



Thanks again Ken!  Cheers Steve

Re: [M100] Clock Doubler Video

[birt_j]

Even at the normal clock rates the TS-DOS timing issues can cause lock ups. In 
normal use one might only stumble on this occasionally. I noticed this testing 
Backpack drives when I’m doing a lot of the same operations over and over again.

It seems to stem around pressing the next button you want before it is down 
drawing the screen. If I don’t get in a hurry and wait for a second after each 
screen is drawn it never locks up. I suspect that the faster clock exacerbates 
this latent bug. 

 

Jeff Birt

 

From: M100  On Behalf Of Stephen Adolph
Sent: Friday, February 16, 2024 2:16 PM
To: m...@bitchin100.com
Subject: Re: [M100] Clock Doubler Video

 

Ken ,

What a great job you've done!  Thank you sir.

You really did a nice job with the assembly and commentary on how to install it.

At some point I have to find out why Starblaze video is broken

I'm adding the upgrade to all my machines to try and get as much experience 
with it as possible.

 

I have noticed that TSDOS sometimes does not work in 5MHz mode, whereas Teeny 
does.  So that has to be a software and timing issue to sort out.

 

Thanks again Ken!  Cheers Steve

Re: [M100] Clock Doubler Video

[Stephen Adolph]

Ken ,
What a great job you've done!  Thank you sir.
You really did a nice job with the assembly and commentary on how to
install it.
At some point I have to find out why Starblaze video is broken
I'm adding the upgrade to all my machines to try and get as much experience
with it as possible.

I have noticed that TSDOS sometimes does not work in 5MHz mode, whereas
Teeny does.  So that has to be a software and timing issue to sort out.

Thanks again Ken!  Cheers Steve

On Friday, February 16, 2024, Ken St. Cyr  wrote:

> Hi folks -
>
> Just wanted to share that I released a video today detailing my journey in
> building and installing Steve Adolph's clock doubler mod:
>
> Adding TURBO MODE to the Tandy Model 100 (youtube.com)
> 
>
> I really enjoyed this one, and am super appreciative of Steve for
> patiently answering all of my questions and helping me understand how it
> all worked so I could explain it (hopefully) semi-adequately in the video.
> I've been using the mod daily for the past couple of weeks now, and while
> there are some quirks, once you have that speed boost, it's hard to live
> without it!
>
> I know Steve's not planning on selling any kits, but I do have a couple of
> boards and parts left over. If you're interested in one, please feel free
> to reach out to me directly and we can arrange something -
>
> Thanks -
> //Ken S.
>