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Falcon ROM Wait States (Speed up your falcon ROM)
Posted: 28 Aug 2017 11:28
by exxos
- FALCWS.JPG (162.96 KiB) Viewed 7152 times
A lot of Falcon's had slower ROM's meaning Atari had to use "wait states" in order to slow the ROM access speed down. You can however update the ROM with a "Fast ROM" as sold in my store and update the solder links on the falcon to use the faster ROM access speeds. This will give your machine a small speed boost!
The image above shows the solder locations on U46 pads to enable zero wait states.
Below is a benchmark of before and after the fast ROM is fitted.
(click for larger image)
- falc1300.png (150.85 KiB) Viewed 7152 times
The jumper speed settings I have found as stated below.
Where 1 is soldered, and 0 is open. %= ROM speed test in GB5.
10010000 165%
10110000 196%
10100000 142%
10000000 196% (reserved)
While you can try this with your original ROM, I found after several hours of running the Falcon did not power up anymore. So I really do suggest updating your ROM for a "fast-rom" and also TOS404 is the best version of TOS to have on your falcon anyway, so well worth the upgrade if you have a less version.
HOME PAGE
http://www.exxosforum.co.uk/atari/last/FALCWS/index.htm
STORE PAGE
https://www.exxosforum.co.uk/atari/store2/#0019
Re: Falcon ROM Wait States (Speed up your falcon ROM)
Posted: 16 Jan 2018 13:25
by dhedberg
exxos wrote: 28 Aug 2017 11:28
While you can try this with your original ROM, I found after several hours of running the Falcon did not power up anymore. So I really do suggest updating your ROM for a "fast-rom" and also TOS404 is the best version of TOS to have on your falcon anyway, so well worth the upgrade if you have a less version.
The original ROM gave up permanently due to lowering the number of wait states? Did it run too hot?
Re: Falcon ROM Wait States (Speed up your falcon ROM)
Posted: 16 Jan 2018 13:34
by exxos
dhedberg wrote: 16 Jan 2018 13:25
The original ROM gave up permanently due to lowering the number of wait states? Did it run too hot?
The original ROM isn't fast enough. When I tried it, the Falcon worked for about 6 or 7 hours then refused to boot after that.
Possible putting the slower waitstates back could work.. but I never investigated it, I just put a faster ROM in instead ;)
Re: Falcon ROM Wait States (Speed up your falcon ROM)
Posted: 09 Aug 2018 20:47
by exxos
A better benchmark with GB6 to show the 0WS speed up...
This particular machine benchmaked all tests at 99% (hence RAM speed 99%) To lazy to get it all accurate, but gives the idea anyway...
- 0WS_result.png (183.59 KiB) Viewed 6649 times