TT Rom access speedup

The latest tweaks and fixes to keep your machine running in tip-top shape.
Steve
Posts: 2747
Joined: Fri Sep 15, 2017 11:49 am

Re: TT Rom access speedup

Post by Steve »

Hey Atarian would it be possible for you to post a simplified guide with some mobo photos to help? Thx

Also is it possible for me to find out what speed my thunderstorm roms are? I can't program roms so it might be problematic for me.
Atarian Computing
Posts: 451
Joined: Tue Aug 22, 2017 4:27 am

Re: TT Rom access speedup

Post by Atarian Computing »

Steve wrote: Sun Mar 10, 2019 11:47 pm Hey Atarian would it be possible for you to post a simplified guide with some mobo photos to help? Thx

Also is it possible for me to find out what speed my thunderstorm roms are? I can't program roms so it might be problematic for me.
Sure, I can make a guide. I just need to finalize my custom ROMs and install them before I can do that.

You'd have to scrape away the sticker to reveal the chip details from one of the chips. No other way around it I'm afraid. But there are many variables involved so I wouldn't discount 150ns ROMs even though they didn't work for me.
guus.assmann
Posts: 94
Joined: Sat Sep 23, 2017 8:52 pm
Location: Ede Netherlands

TT Rom access speedup

Post by guus.assmann »

Hello,

Here's a picture of the 2 diodes on pin 15 and 16.
The grey wire goes to the Eprom-CS at pin 22.
That's all there is to it.

BR/
Guus
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Atarian Computing
Posts: 451
Joined: Tue Aug 22, 2017 4:27 am

Re: TT Rom access speedup

Post by Atarian Computing »

guus.assmann wrote: Mon Mar 11, 2019 6:26 pm Hello,

Here's a picture of the 2 diodes on pin 15 and 16.
The grey wire goes to the Eprom-CS at pin 22.
That's all there is to it.

BR/
Guus
Exactly how I did mine :)
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Icky
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Joined: Sun Sep 03, 2017 10:57 am
Location: UK

Re: TT Rom access speedup

Post by Icky »

guus.assmann wrote: Mon Mar 11, 2019 6:26 pm Hello,

Here's a picture of the 2 diodes on pin 15 and 16.
The grey wire goes to the Eprom-CS at pin 22.
That's all there is to it.

BR/
Guus
H guss. You seem to have a large 2200uF cap piggy backing one of the original caps. Is this one of your mods?
guus.assmann
Posts: 94
Joined: Sat Sep 23, 2017 8:52 pm
Location: Ede Netherlands

Re: TT Rom access speedup

Post by guus.assmann »

No, I've not mounted that capacitor.
But it doesn't hurt.

BTW: It's possible to mount a switch in series with the grey cable.
This makes it possible to have the standard speed.
May be needed in some cases, altough I've not encountered that yet.

BR/
Guus
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